3.0.0 (2020-09-18)

3.0.0-rc.13 (2020-09-18)

Bug Fixes

hmr: make hmr working with class components (#2144) (422f05e)
reactivity: avoid length mutating array methods causing infinite updates (#2138) (f316a33), closes #2137
suspense: should discard unmount effects of invalidated pending branch (5bfcad1)
types: component instance inference without props (#2145) (57bdaa2)

Code Refactoring

watch APIs default to trigger pre-flush (49bb447), closes /github.com/vuejs/vue-next/issues/1706#issuecomment-666258948

Features

runtime-core: support using inject() inside props default functions (58c31e3)
watch: support dot-delimited path in watch option (1c9a0b3)

BREAKING CHANGES

watch APIs now default to use flush: 'pre' instead of flush: 'post'. This change affects watch, watchEffect, the watch component option, and this.$watch. See (49bb447) for more details.

3.0.0-rc.12 (2020-09-16)

Bug Fixes

reactivity: effect should only recursively self trigger with explicit options (3810de7), closes #2125
runtime-core: ensure root stable fragments inherit elements for moving (bebd44f), closes #2134
runtime-core: should still do full traverse of stable fragment children in dev + hmr (dd40ad8)
runtime-core/async-component: fix error component when there are no error handlers (c7b4a37), closes #2129
types/tsx: optional props from Mixin/Extends are treated as required (#2048) (89e9ab8)

Features

compiler-sfc: additionalData support for css preprocessors (#2126) (066d514)

3.0.0-rc.11 (2020-09-15)

Bug Fixes

compiler-core: fix prefixing for <template v-for> key expressions (be946ea), closes #2085
compiler-core: fix v-if block handling for components that fail to resolve (a096a58), closes #2058
compiler-sfc: should extract comment for import or type declarations (#2107) (05df696), closes #2102
compiler-ssr: correct the variable name generated by the generator (#2065) (aa8dc9a)
compiler-ssr/teleport: correct the target prop of teleport (#2053) (7455dca)
inject: fix support for inject option default function (d472461), closes #2050
keep-alive: should use onMounted and onUpdated to invoke cacheSubtree (#1984) (890ca8a)
KeepAlive: when exclude prop change, it should prune cache that not matched (#2111) (98cc1f9)
reactivity: toRef should not wrap a ref (#2103) (d4bf9bc)
should be able to parse decorators in script lang="ts" & jsx (#2088) (273d19a)
reactivity: add NaN prop on Array should not trigger length dependency. (#1998) (0d4910a)
reactivity: revert ac81dcf (5f40539), closes #2043
reactivity: should trigger collection's write-function correctly on non-reactive keys (#1992) (fcf9b2c)
inherit el for static nodes inside keyed template fragment (#2089) (a32870a), closes #2080
runtime-core: fix priority of option merging (#2041) (95c07d8)
runtime-core: warn reserved prefix for setup return properties and ensure consistent dev/prod behavior (fa7ab0a), closes #2042
runtime-core/inject: handle optional from option in inject object config (#2073) (313dd06)
runtime-core/refs: handle multiple merged refs for dynamic component with vnode (612eb67), closes #2078
sfc: fix scoped style regression for child component with single root + comment (6dbc6c4), closes #2046
types: properly infer return type from async setup (#2051) (24fcf6a), closes #2049

Features

update Suspense usage (#2099) (5ae7380)
compiler-sfc: support additionalData option in compileStyle when processing sass (#1952) (9377352)
runtime-dom: allow native Set as v-model checkbox source (#1957) (cf1b6c6)

Performance Improvements

should not trigger child update if changed prop is declared emit listener (124c385), closes #2072

Reverts

Revert "refactor(runtime-core): add @internal for instance.proxy (#1849)" (#2024) (09a939d), closes #1849 #2024

3.0.0-rc.10 (2020-09-02)

Bug Fixes

devtools: make el extra properties non-enumerable (7fd3436)
runtime-core: enable block tracking when normalizing plain element with slot children (#1987) (5b82c48), closes #1980
runtime-core: ensure consistent $options merge behavior with 2.x (#1986) (706b52a), closes #1978 #1979
runtime-core: fix props/emits resolving with global mixins (8ed0b34), closes #1975
runtime-core: openBlock() should not be tracked when block tracking is disabled (ad93fa4)
runtime-core: v-model listeners that already exists on the component should not be merged (#2011) (63f1f18), closes #1989
sfc/scoped-style: inherit scopeId through nested HOCs with inheritAttrs: false (c0427b4), closes #1988
types: fix this type of this.$watch (#2022) (aa757e8)
v-once: fix v-once usage with v-if and v-for (52e45a9), closes #2035

Features

compiler-sfc: analyze script bindings (#1962) (4421c00)
devtools: expose vnode and component on elements (38ca7e8)
ssr: serverPrefetch (c73b4a0)

Performance Improvements

reactivity: no need to proxy has/ownKeys for readonly objects (691a4b9)

3.0.0-rc.9 (2020-08-26)

Bug Fixes

runtime-core: class and style should be properly normalized in cloneVNode (#1967) (9153fc2), closes #1964
runtime-core: fix resolving assets from mixins and extends (0cb7f7f), closes #1963
runtime-core: properly call lifecycle hooks in chained mixins & extends (#1974) (6df0e73), closes #1973

Performance Improvements

reactivity: add existing index or non-integer prop on Array should not trigger length dependency (#1969) (d5c4f6e)
reactivity: avoid triggering Map.has twice on non-reactive keys (#1972) (97bc30e)

3.0.0-rc.8 (2020-08-25)

Bug Fixes

devtools: unmountApp not behind compile flag (6eb7fd8)
hmr: properly force hmr full component props update (499bc0b), closes #1942
keep-alive: should remove wrapped version of injected keep alive hooks (#1959) (1ea2400)
reactivity: fix iOS 12 JSON.stringify error on reactive objects (016ba11), closes #1916
runtime-core: fix data merge order for mixins/extends (c15311c), closes #1953
runtime-core/scheduler: handle nested flushPostFlushCbs calls (36fa42a), closes #1947
runtime-dom: avoid setting unchanged input value (#1937) (1d55454), closes #1935
ssr: invoke directive created hook during hydration (57642fa)
types: relax ComponentPublicInstanceConstructor type for class components (#1943) (67b6e0f)
watch: traverse refs in deep watch (#1939) (10293c7), closes #1900

Features

devtools: catch events (23233dc)
devtools: expose setupState target object (31b99a9)
directives: introduce created custom directive hook and ensure (11804fe), closes #1931
runtime-core: support variadic children in h for simple JSX compat (54d06ec), closes #1917

3.0.0-rc.7 (2020-08-21)

Bug Fixes

compiler-core: should attach key to single element child of <template v-for> (#1910) (69cfed6)
reactivity: unwrap non-index accessed refs on reactive arrays (#1859) (3c05f8b), closes #1846
runtime-core: correctly track dynamic nodes in renderSlot (#1911) (7ffb79c)
runtime-core: disable block tracking when calling compiled slot function in tempalte expressions (f02e2f9), closes #1745 #1918
teleport: only inherit el for non-patched nodes (d4cc7b2), closes #1903

Performance Improvements

reactivity: improve ref performance by using class-based implementation (#1900) (07919e0)

3.0.0-rc.6 (2020-08-19)

Bug Fixes

codeframe: Added Math.max to prevent RangeError (#1807) (b14f4a5), closes #1806
compiler-core: generate NEED_PATCH flag for element with vnode hooks (24041b7)
compiler-core: v-if key error should only be checking same key on different branches (de0c8a7)
compiler-sfc: custom blocks sourcemap (#1812) (619efd9)
keep-alive: fix activated hook invocation on nested components (#1743) (233d191), closes #1742
reactivity: accept subtypes of collections (#1864) (d005b57)
reactivity: effect should still check sync self-trigger (ac81dcf)
reactivity: readonly+reactive collection should also expose readonly+reactive values (ed43810), closes #1772
reactivity: use isExtensible instead of isFrozen (#1753) (2787c34), closes #1784
runtime-core: avoid manual slot invocation in template expressions interfering with block tracking (791eff3), closes #1745
runtime-core: check if the key is string on undefined property warning (#1731) (ce78eac)
runtime-core: fix beforeUpdate call timing to allow state mutation (1eb6067), closes #1899
runtime-core: fix Object props validation for objects with custom toStringTag (6ccd9ac), closes #1872
runtime-core: separate null vs. non-null ref value updates (#1835) (3991ff0), closes #1789 #1834
runtime-core: should correctly call beforeEnter inside Suspense (#1805) (bc6f252), closes #1795
runtime-core/scheduler: allow component render functions to trigger itself (611437a), closes #1801
runtime-core/scheduler: only allow watch callbacks to be self-triggering (09702e9), closes #1740 #1727
runtime-core/scheduler: prevent duplicate queue (#1767) (b2a9142)
runtime-core/scheduler: sort postFlushCbs to ensure refs are set before lifecycle hooks (#1854) (caccec3), closes #1852
runtime-dom: fix v-on same computed handler on multiple elements (1c967fc), closes #1747
runtime-dom: patch form as an attribute (#1788) (00683fc), closes #1787
runtime-dom: style binding multi value support (0cd98c3), closes #1759
runtome-core: do not cache property access in beforeCreate hook (f6afe70), closes #1756
teleport: always inherit root DOM nodes on patch (#1836) (517c2b8), closes #1813
transition: transition should accept multiple handlers on same event (48576e5), closes #1746
types: handling PropType with default value (#1896) (c2913d5), closes #1891
types/jsx: update innerHTML property in jsx typing (#1814) (b984d47)
watch: allow handler to be a string (#1775) (b5f91ff), closes #1774
watch: exhaust pre-flush watchers + avoid duplicate render by pre-flush watchers (a0e34ce), closes #1777
watch: pre-flush watcher watching props should trigger before component update (d4c17fb), closes #1763
watch: should trigger watcher callback on triggerRef when watching ref source (fce2689), closes #1736

Features

compiler-core: add comments parser option (#1858) (62b9d02)
reactivity: return array when calling toRefs on array (#1768) (4172fdb), closes #1764
runtime-core: pass current props to prop default value functions (0d508e9), closes #1886

3.0.0-rc.5 (2020-07-28)

Bug Fixes

build: fix component resolution when disabling options API (a75b8a2), closes #1688
compiler-core: always compile Teleport and Suspense as blocks (fbf865d)
compiler-core: prevent generating invalid code for v-bind with empty expression (#1720) (d452723)
compiler-core/v-on: only cache empty handler when the option is used (5fbd1f4), closes #1716
compiler-sfc: less and stylus output deps path is absolute p… (#1685) (578f25c)
compiler-sfc: fix rewrite named export default (#1675) (452edb7)
hmr: should update el for HYDRATE_EVENTS patchFlags node (#1707) (de62cc0)
reactivity: avoid tracking internal symbols in has trap (7edfdf7), closes #1683
reactivity: fix ref mutation debugger event values (b7ef38b)
runtime-core: dev root resolution should differentiate user comments vs v-if comments (355c052), closes #1704
runtime-core: fix scheduler dedupe when not flushing (4ef5c8d)
runtime-core: respect render function from mixins (354d79c), closes #1630
runtime-core: scheduler should allow intentional self triggering effects (c27dfe1), closes #1727
runtime-core: use correct container for moving Teleport content (#1703) (04a4eba)
style-vars: fix css vars on component with suspense as root (#1718) (07ece2e)
v-model: enable v-model type detection on custom elements (0b3b1cf)
runtime compilation marker should be applied in exposed compile function (b3b65b4)
transition: should call transition hooks inside already resolved suspense (#1698) (2a633c8), closes #1689
v-model: allow v-model usage on declared custom elements (71c3c6e), closes #1699

Features

reactivity: proxyRefs method and ShallowUnwrapRefs type (#1682) (aa06b10)
sfc: support resolving template components from <script setup> exports (6f5d840)
support delimiters option for runtime compilation (ba17c87), closes #1679

BREAKING CHANGES

reactivity: template auto ref unwrapping are now applied shallowly, i.e. only at the root level. See vuejs#1682 for more details.

3.0.0-rc.4 (2020-07-21)

Bug Fixes

deps: move @babel/types back to dependencies (11c2ad4)

3.0.0-rc.3 (2020-07-21)

Bug Fixes

build: make transition tree-shakeable again (ad199e1)
compiler-sfc: <style vars scoped> prefixing should only apply to pre-transform source (4951d43), closes #1623
compiler-sfc: use correct importer with useCssVars (#1658) (6f148d0)
runtime-core: do not use bail patchFlag on cloned vnodes (6390ddf), closes #1665
runtime-core: fix attr fallthrough on compiled framgent w/ single static element + comments (1af3531)
v-model: v-model listeners should not fallthrough to plain element root (c852bf1), closes #1643
watch: fix watching reactive array (#1656) (288b4ea), closes #1655

Features

compiler-core/internal: add onContextCreated option to generate (#1672) (615dccd)
runtime-core: respect function name when using defineComponent function shorthand (#1661) (304830a)
provide ability to overwrite feature flags in esm-bundler builds (54727f9)
computed: add readonly flag if no setter is provided (#1654) (dabdc5e)

3.0.0-rc.2 (2020-07-19)

Bug Fixes

compiler-core: fix v-if + v-for on <template> (af7e100), closes #1637
compiler-core/v-on: fix codegen for event handler with newlines (#1640) (f9826fa)
compiler-sfc: use filename from options when compile styl preprocessor (#1635) (0526e5d)
keep-alive: handle "0" as cache key (#1622) (2deb0c7), closes #1621
runtime-core/hmr: only use cloneNode mount optimization in prod (4655d69), closes #1626
watch: callback not called when using flush:sync (#1633) (8facaef)

3.0.0-rc.1 (2020-07-17)

Bug Fixes

watch: post flush watchers should not fire when component is unmounted (341b30c), closes #1603

Features

types: deny unknown attributes on component by default (#1614) (5d8a64d), closes #1519
types: expose DeepReadonly type (#1606) (527c2c8)
Initial devtools support (#1125) (568b6db)

3.0.0-beta.24 (2020-07-16)

Bug Fixes

compiler-sfc: fix preprocessor filename access (9cb29ee)

3.0.0-beta.23 (2020-07-16)

Bug Fixes

compiler-sfc: fix useCssVars codegen (9b5ff2b)
compiler-sfc: prohibit src usage for <script setup> + do not (af4b0c2)
runtime-dom: unref when setting useCssVars (44e6da1)
slots: properly force update on forwarded slots (aab99ab), closes #1594

Features

compiler-sfc: export dependencies for css and css preprocessors (#1278) (e41d831)

Performance Improvements

runtime-core: avoid duplicate postFlushCb invocation (165068d), closes #1595

3.0.0-beta.22 (2020-07-15)

Bug Fixes

compiler-core: generate incremental keys for v-if/else-if/else chains (#1589) (64c7b2f), closes #1587
compiler-sfc: <script setup> warning (9146cc4)
hmr: fix hmr updates for reused hoisted trees (5f61aa0)
runtime-core: do not call transition enter hooks when mounting in suspense (#1588) (246ec5c), closes #1583
v-model: handle more edge cases in looseEqual() (#379) (fe1b27b)

Features

types/reactivity: use DeepReadonly type for readonly return type (#1462) (b772bba), closes #1452

3.0.0-beta.21 (2020-07-14)

Bug Fixes

compiler-dom: fix v-on .left .right modifier handling (6b63ba2)
runtime-core: avoid scopeId as attr for slot nodes with same scopeId (#1561) (583a1c7), closes vitejs/vite#536
runtime-core/emits: merge emits options from mixins/extends (ba3b3cd), closes #1562
runtime-dom: remove attrs with nullish values (cb6a091), closes #1576
runtime-dom/v-on: only block event handlers based on attach timestamp (8b320cc), closes #1565
slots: differentiate dynamic/static compiled slots (65beba9), closes #1557
v-on: capitalize dynamic event names (9152a89)
v-on: refactor DOM event options modifer handling (380c679), closes #1567

Features

ssr support for <style vars> (b9595e6)
compiler-sfc: <script setup> support (experimental) (4c43d4e)
compiler-sfc: <style vars> CSS variable injection (bd5c3b9)
compiler-sfc: allow using :deep, :global & :slotted for short in <style scoped> (f3cc41f)
runtime-dom: useCssVars (9f706a9)

3.0.0-beta.20 (2020-07-08)

Bug Fixes

compiler-core/v-on: bail caching for member expression handlers on components (87c2a1e), closes #1541
compiler-dom: should ignore and warn side effect tags like script and style (5e52f4e)
runtime-core: should allow v-model listeners to fallthrough, but ignore for warning (903e8f6), closes #1543

Features

types: expose WritableComputedRef (#1500) (220db9b)

3.0.0-beta.19 (2020-07-07)

Bug Fixes

compiler-core: add \r to accepted chars after end tag name (#1515) (64e2f46), closes #1476
keep-alive: fix keep-alive with scopeId/fallthrough attrs (d86b01b), closes #1511
runtime-core/template-ref: template ref used in the same template should trigger update (36b6b4f), closes #1505
runtime-dom: should set <input list="..."> as attribute (441c236), closes #1526
runtime-dom/style: fix patchStyle on falsy next value (#1504) (77538ec), closes #1506
ssr: support dynamic components that resolve to element or vnode (41db49d), closes #1508
types/tsx: add JSX.IntrinsicAttributes definition (#1517) (a5b4332), closes #1516
v-model: consistent nullish value handling with 2.x (#1530) (425335c), closes #1528
v-model: should ignore compiled v-model listeners in attr fallthrough (6dd59ee), closes #1510
watch: stop instance-bound watchers in post render queue (58b0706), closes #1525

3.0.0-beta.18 (2020-07-02)

Bug Fixes

runtime-core: avoid accidental access of Object.prototype properties (f3e9c1b)
ensure vnode hooks are called consistently regardless of keep-alive (4e8e689)
runtime-core: pass unmount into initial mount patch prop (2bdb5c1)
runtime-dom: allow force updating value bindings for controlled inputs (b3536d8), closes #1471
slots: make compiled slot marker non-enumerable (062835d), closes #1470

Features

runtime-core: support creating vnode from existing vnode (c9629f2)

3.0.0-beta.17 (2020-06-30)

Bug Fixes

runtime-dom: allow force updating value bindings for controlled inputs (b3536d8), closes #1471
slots: make compiled slot marker non-enumerable (062835d), closes #1470

3.0.0-beta.16 (2020-06-29)

Bug Fixes

BaseTransition: collect correct children with slot passthrough in Transition (#1456) (d4cd128), closes #1455
BaseTransition: fix BaseTransition delayed leave with mode in-out (#1404) (2ff8dca), closes #1400
compiler-core: ignore comment nodes in transition children (e52b7cd), closes #1352
compiler-core: should not prefix object method (#1375) (35dbef2)
compiler-core: skip empty expressions when validating expressions in browser mode (afb231e)
compiler-core/v-on: pass noninitial arguments in cached event handlers (#1265) (7e28173)
compiler-sfc: transformAssetUrl should ignore inline data url (#1431) (90c285c)
runtime-core: always check props presence in public instance proxy (e0d19a6), closes #1236
runtime-core: cloneVNode should preserve correct ctx instance when normalizing ref (be69bee), closes #1311
runtime-core: component root should inherit scopeId from VNode (f3f94e4), closes #1399
runtime-core: fix component name inference in warnings (e765d81), closes #1418
runtime-core: fix parent el update on nested HOC self-update (#1360) (6c8bfa1), closes #1357
runtime-core: fix scopeId inheritance for component inside slots (978d952)
runtime-core: handle patch flag de-op from cloned vnode (0dd5cde), closes #1426
runtime-core: properly capitalize v-on object keys (#1358) (250eb4a)
runtime-core: should remove no longer present camelCase props (#1413) (1c4e1b6), closes #1412
slots: filter out compiler marker from resolved slots (70ea76a), closes #1451
ssr: fix ssr scopeId on component root (afe13e0)
ssr: handle fallthrough attrs in ssr compile output (d5dbd27)
transition: enter/leave hook timing consistency with v2 (bf84ac8), closes #1145
transition: fix appear hooks handling (7ae70ea)
transition: fix css:false with hooks with no explicit done callback (9edbc27), closes #1149
transition: fix dom transition cancel hooks not being called (acd3156)
transition-group: vue 2 compatible handling of transition-group w/ multiple v-for children (86d3972), closes #1126
types: ensure correct public props interface for defineComponent instance type (2961e14), closes #1385
types: export ComponentOptionsMixin (#1361) (68e2d6c)
types: should unwrap array -> object -> ref (82b28a5)
v-show: fix v-show unmount with falsy value (#1403) (d7beea0), closes #1401

Features

runtime-core: expose version on app instance (056cac9), closes #1449
ssr: renderToStream (#1197) (6bc0e0a)

Performance Improvements

compiler-core: treat v-for with constant exp as a stable fragment (#1394) (8a2cf21)
reactivity: should not track __v_isRef (#1392) (c43a6e6)
ssr: avoid unnecessary await ticks when unrolling sync buffers (30584bc)

3.0.0-beta.15 (2020-06-12)

Bug Fixes

build: retain main vue package side effect for compiler registration (dc986ad), closes #1263
compiler-core: allow multiline expression on v-model and v-on (#1234) (958b6c8)
compiler-core: bail static stringfication even threshold is met (#1298) (64ec8bf), closes #1128
compiler-core: fix parsing for directive with dynamic argument containing dots (0d26413)
compiler-core: support static slot names containing dots for 2.x compat (825ec15), closes #1241
hmr: force full update on nested child components (#1312) (8f2a748)
reactivity: fix toRaw for objects prototype inherting reactive (10bb34b), closes #1246
runtime-core: should pass instance to patchProp on mount for event error handling (#1337) (aac9b03), closes #1336
runtime-core: track access to $attrs (6abac87), closes #1346
always treat spellcheck and draggable as attributes (4492b88), closes #1350
compiler-core: fix prod whitespace/comment removal (f3623e4), closes #1256
compiler-dom: add tfoot,caption,col element on bail stringification (#1333) (fbaf52a)
compiler-dom: bail stringification on table elements (a938b61), closes #1230 #1268
compiler-sfc: asset url transform should ignore direct hash urls (5ddd9d2)
compiler-ssr: should escape template string interpolation chars in generated code (5f15d9a)
hmr: force full update in child component on slot update (2408a65)
reactivity: replaced ref in reactive object should be tracked (#1058) (80e1693)
reactivity: shallowReactive collection to not-readonly (#1212) (c97d1ba)
runtime-core: default value for function type prop (#1349) (d437a01), closes #1348
runtime-core: mount children before setting element props (8084156), closes #1318 #1320
runtime-core: respect props from mixins and extends (2417a0c), closes #1236 #1250
runtime-core: use array destructuring instead of object for edge compat (#1302) (4a5021e), closes #1294
runtime-dom: compatibility for cases where event.timeStamp is 0 (#1328) (90c3532), closes #1325
ssr: fix unintended error on Teleport hydration mismatch (#1271) (c463a71), closes #1235
types: add RawSlots in h signature (#1293) (cab769f)
bail stringification for slots (9b5d13e), closes #1281 #1286
ssr: should set ref on hydration (0a7932c)
run ci (6b889e7)

Features

compiler: better warning for invalid expressions in function/browser mode (e29f0b3), closes #1266
runtime-core: add inheritRef option + make <transition> & <keep-alive> inherit refs (38f2d23)
types: adjust type exports for manual render function and tooling usage (e4dc03a), closes #1329
types: mixins/extends support in TypeScript (#626) (d3c436a)
types: support typing directive value via generic argument (#1007) (419b86d), closes #998
types: update to Typescript 3.9 (#1106) (97dedeb)

Performance Improvements

only patch string style when value has changed (#1310) (d4e9b19), closes #1309
optimize LRU access in keep-alive (#1316) (1f2926a)

3.0.0-beta.14 (2020-05-18)

Bug Fixes

compiler-dom: should bail stringification on runtime constant regardless of position (dd2bfb5), closes vuejs/vite#157
reactivity: shallowReactive for collections (#1204) (488e2bc), closes #1202
runtime-dom: event handlers with modifiers should get all event arguments (#1193) (ab86b19)
Transition: fix validate duration (#1188) (d73a508)
v-model: should not trigger updates during input composition (#1183) (83b7158)

Features

watch: support directly watching reactive object in multiple sources with deep default (#1201) (ba62ccd)

3.0.0-beta.13 (2020-05-17)

Features

improve static content stringification (d965bb6)

3.0.0-beta.12 (2020-05-11)

Bug Fixes

hmr: static child traversal should only affect elements (2bc6a8c)

3.0.0-beta.11 (2020-05-11)

Bug Fixes

hmr: always force full child component props update in HMR mode (1b946c8)
hmr: ensure static nodes inherit DOM element in hmr mode (66c5a55), closes #1156
runtime-core: should not take unmount children fast path for v-for fragments (5b8883a), closes #1153
transition: should reset enter class after appear (#1152) (697de07)

Features

runtime-core: expose isVNode (a165d82)

3.0.0-beta.10 (2020-05-07)

Bug Fixes

compiler: warn against v-bind with empty attribute value (675330b), closes github.com/vuejs/vue-next/issues/1128#issuecomment-624647434
compiler-dom: bail static stringfication on non-attr bindings (304ab8c), closes #1128
compiler-sfc: should not transform external asset url with (d662118)
compiler-sfc: template with alt lang should be parsed as raw text (d10835a), closes #1120
reactivity: fix __proto__ access on proxy objects (#1133) (037fa07)
reactivity: use correct thisArg for collection method callbacks (#1132) (e08f6f0)
runtime-dom/style: normalize string when merging styles (#1127) (2d9f136)

Code Refactoring

compiler/types: convert compiler options documentation to jsdoc (e58beec)

Features

compiler-sfc: improve sfc source map generation (698c8d3)
types: re-expose trasnformVNodeArgs (40166a8)

Performance Improvements

compiler-sfc: improve asset url transform efficiency (c5dcfe1)
compiler-sfc: only add character mapping if not whitespace (2f69167)

BREAKING CHANGES

compiler/types: getTextMode compiler option signature has changed from

(tag: string, ns: string, parent: ElementNode | undefined) => TextModes

to

(node: ElementNode, parent: ElementNode | undefined) => TextModes

3.0.0-beta.9 (2020-05-04)

Bug Fixes

compiler: bail strigification on runtime constant expressions (f9a3766)
transitionGroup: fix transition children resolving condition (f05aeea)

Features

compiler-sfc: support transforming absolute asset urls (6a0be88)

BREAKING CHANGES

compiler-sfc: @vue/compiler-sfc's transformAssetUrlsBase option has been removed. It is merged into trasnformAssetUrls which now also accepts the format of
```
{
  base?: string
  includeAbsolute?: string
  tags?: { [name: string]: string[] }
}
```

3.0.0-beta.8 (2020-05-04)

Bug Fixes

hmr: handle cases where instances with same id having different definitions (01b7e90)
reactivity: avoid polluting Object prototype (f40f3a0)
reactivity: check own property for existing proxy of target (6be2b73), closes #1107
transitionGroup: inner children should skip comment node (#1105) (26a50ce)
types/reactivity: fix ref type inference on nested reactive properties with .value (bc1f097), closes #1111

Features

shared: support Map and Set in toDisplayString (3c60d40), closes #1067 #1100
types: re-expose resolve asset utitlies and registerRuntimeCompiler in type definitions (64ef7c7), closes #1109
watch: support directly watching reactive object with deep default (6b33cc4), closes #1110

3.0.0-beta.7 (2020-05-02)

Bug Fixes

warn: cast symbols to strings (#1103) (71a942b)

Features

compiler-sfc: add transformAssetUrlsBase option (36972c2)
types: re-expose withDirectives as public type (583ba0c)

3.0.0-beta.6 (2020-05-01)

Bug Fixes

compiler-core: hoist pure annotations should apply to all nested calls (c5e7d8b)
compiler-core: hoisted vnode calls and scoped id calls should be marked pure (cad25d9)
compiler-ssr: handle comments codegen + refactor ssr codegen transform (6c60ce1)
runtime-core: avoid infinite warning loop for isRef check on component public proxy (6233608), closes #1091
runtime-core: cloned vnodes with extra props should de-opt (08bf7e3)
runtime-core: fix slot fragment bail check (ac6a6f1)
runtime-core: should call Suspense fallback unmount hook (#1061) (8b85aae), closes #1059
runtime-core: should catch dom prop set TypeErrors (98bee59), closes #1051
runtime-dom: should not coerce nullish values to empty strings for non-string dom props (20bc7ba), closes #1049 #1092 #1093 #1094
ssr: fix escape and handling for raw Text, Comment and Static vnodes (5b09e74)
teleport: teleport should always be tracked as dynamic child for unmount (7f23555), closes #1088
types: augment ref unwrap bail types in appropriate packages (b40fcbc)

Code Refactoring

types: mark internal API exports and exclude from d.ts (c9bf7de)

Features

runtime-core: warn against user properties with reserved prefixes (1bddeea)

Performance Improvements

instance public proxy should never be observed (11f38d8)

BREAKING CHANGES

types: Internal APIs are now excluded from type declarations.

3.0.0-beta.5 (2020-04-30)

Bug Fixes

compiler-ssr: avoid unnecessary withCtx import (08b4e88)
hmr: support hmr for static nodes (386b093)
hydration: fix text mismatch warning (e087b4e)
keep-alive: do not invoke onVnodeBeforeUnmount if is KeepAlive component (#1079) (239270c)
transition-group: should collect raw children with Fragment (#1046) (8ed3455), closes #1045
warning: always check for component instance presence when formatting traces (a0e2c12)

Features

runtime-core: export queuePostFlushCb (#1078) (ba240eb)

types

use more consistent naming for apiWatch type exports (892fb6d)

BREAKING CHANGES

Some watch API types are renamed.
- BaseWatchOptions -> WatchOptionsBase
- StopHandle -> WatchStopHandle

3.0.0-beta.4 (2020-04-24)

Bug Fixes

compiler-core: dynamic component should always be made blocks (7d0ab33), closes #1018
runtime-core: dynamic component should support falsy values without warning (ded92f9)
runtime-core: fix dynamic node tracking in dynamic component that resolves to plain elements (dcf2458), closes #1039
runtime-core: fix key/ref resolution for cloneVNode (d7379c7), closes #1041
runtime-core: mixin options that rely on this context should be deferred (ff4d1fc), closes #1016 #1029
runtime-core: only infer component name for object components (e422b8b), closes #1023
slots: compiled slot fallback should be functions (#1030) (2b19965), closes #1021
types: fix ref(false) type to Ref (#1028) (0bdd889)
types: make return type of defineComponent assignable to Component type (#1032) (f3a9b51), closes #993

Features

compiler-sfc: add preprocessCustomRequire option (20d425f)
compiler-sfc: built-in support for css modules (fa216a0)
reactivity: add triggerRef API (2acf3e8)
types: expose ToRefs type (#1037) (28b4c31)

Performance Improvements

reactivity: ref should not trigger if value did not change (b0d4df9), closes #1012

3.0.0-beta.3 (2020-04-20)

Bug Fixes

runtime-core: should not cast prop value if prop did not change (171cfa4), closes #999
warn: fix component name inference in warning trace (0278992)

Features

build: provide more specific warnings for runtime compilation (e954ba2), closes #1004
runtime-core: improve warning for extraneous event listeners (#1005) (cebad64), closes #1001
runtime-core: more specific warning for failed v-on fallthrough (ab844fd), closes #1001
warn: infer anonymous component named based on resolve name (dece610)

Performance Improvements

core: use startsWith instead of indexOf (#989) (054ccec)

3.0.0-beta.2 (2020-04-17)

Bug Fixes

runtime-core: fix user attached public instance properties that start with "$" (d7ca1c5)
watch: fix deep watchers on refs containing primitives (#984) (99fd158)

Features

types: expose ComponentCustomOptions for declaring custom options (c0adb67)
types: expose ExtractPropTypes (#983) (4cf5e07)
types add ComponentCustomProperties interface (#982) (be21cfb)

3.0.0-beta.1 (2020-04-16)

Bug Fixes

reactivity: remove Symbol.observable (#968) (4d014dc)

Code Refactoring

reactivity: adjust APIs (09b4202)

Features

runtime-core: skip emit warn if has equivalent onXXX prop (0709380)

Performance Improvements

runtime-core: use raw context on component options init (bfd6744)

BREAKING CHANGES

reactivity: Reactivity APIs adjustments:

readonly is now non-tracking if called on plain objects. lock and unlock have been removed. A readonly proxy can no longer be directly mutated. However, it can still wrap an already reactive object and track changes to the source reactive object.
isReactive now only returns true for proxies created by reactive, or a readonly proxy that wraps a reactive proxy.
A new utility isProxy is introduced, which returns true for both reactive or readonly proxies.
markNonReactive has been renamed to markRaw.

3.0.0-alpha.13 (2020-04-15)

Bug Fixes

compiler-core: should not generate CLASS/STYLE patch flags on components (a6e2b10), closes #677
runtime-core: fix kebab-case props update (7cbf684), closes #955
runtime-core: should resolve value instead of delete for dynamic props with options (c80b857)
runtime-dom: fix patching for attributes starting with on (6eb3399), closes #949
runtime-dom: should patch svg innerHtml (#956) (27b5c71)
runtime-dom/v-on: support event.stopImmediatePropagation on multiple listeners (d45e475), closes #916
scheduler: sort jobs before flushing (78977c3), closes #910 /github.com/vuejs/vue-next/issues/910#issuecomment-613097539
types: UnwrapRef should bail on DOM element types (#952) (33ccfc0), closes #951

Code Refactoring

reactivity: remove stale API markReadonly (e8a866e)
runtime-core: remove emit return value (55566e8)

Features

reactivity: add support for customRef API (b83c580)
reactivity: add support for toRef API (486dc18)
runtime-core: detect and warn against components made reactive (2e06f5b), closes #962
runtime-core: warn async data() (3e7bb7d)

Reverts

Revert "feat(reactivity): add effect to public api (#909)" (#961) (9e9d264), closes #909 #961

BREAKING CHANGES

reactivity: markReadonly has been removed.
runtime-dom: Only props starting with on followed by an uppercase letter or a non-letter character are considered event listeners.
runtime-core: this.$emit() and setupContext.emit() no longer return values. For logic that relies on return value of listeners, the listener should be declared as an onXXX prop and be called directly. This still allows the parent component to pass in a handler using v-on, since v-on:foo internally compiles to onFoo.

ref: vuejs/rfcs#16

3.0.0-alpha.12 (2020-04-08)

Bug Fixes

compiler: should not condense   (8c17535), closes #945
compiler: should only strip leading newline directly in pre tag (be666eb)
compiler: support full range of entity decoding in browser builds (1f6e72b)
compiler-core: elements with dynamic keys should be forced into blocks (d531686), closes #916
reactivity: track reactive keys in raw collection types (5dcc645), closes #919
runtime-core: fix globalProperties in check on instance render proxy (c28a919)
runtime-core: set fragment root children should also update dynamicChildren (#944) (a27e9ee), closes #943
runtime-dom: fix getModelAssigner order in vModelCheckbox (#926) (da1fb7a)
runtime-dom: support native onxxx handlers (2302dea), closes #927
slots: should update compiled dynamic slots (8444078)
transition: fix dynamic transition update on nested HOCs (b8da8b2)
transition: should ship props declarations in production (4227831)
types: accept generic Component type in h() (c1d5928), closes #922
v-model: handle dynamic assigners and array assigners (f42d11e), closes #923

Features

asyncComponent: add onError option for defineAsyncComponent (e804463)
runtime-core: improve component public instance proxy inspection (899287a)

BREAKING CHANGES

compiler: compiler options have been adjusted.
- new option decodeEntities is added.
- namedCharacterReferences option has been removed.
- maxCRNameLength option has been removed.
asyncComponent: retryWhen and maxRetries options for defineAsyncComponent has been replaced by the more flexible onError option, per vuejs/rfcs#148

3.0.0-alpha.11 (2020-04-04)

Bug Fixes

compiler: fix pre tag whitespace handling (7f30cb5), closes #908
compiler-core/slots: should support on-component named slots (a022b63)
compiler-sfc: always use offset for template block sourcemaps (#911) (db50009)
inject: allow default value to be undefined (#894) (94562da), closes #892
portal: portal should always remove its children when unmounted (16cd8ee)
reactivity: scheduled effect should not execute if stopped (0764c33), closes #910
runtime-core: support attr merging on child with root level comments (e42cb54), closes #904
runtime-dom: v-cloak should be removed after compile on the root element (#893) (0ed147d), closes #890
runtime-dom: properly support creating customized built-in element (b1d0b04)
transition: warn only when there is more than one rendered child (#903) (37b1dc8)
types: allow use PropType with Function (#915) (026eb72), closes #748
types: export missing types from runtime-core (#889) (412ec86)
types/reactivity: add generics constraint for markNonReactive (f3b6559), closes #917

Code Refactoring

runtime-core: adjust attr fallthrough behavior (21bcdec)
rename <portal> to <teleport> (eee5095)
runtime-core: rename createAsyncComponent to defineAsyncComponent (#888) (ebc5873)

Features

asyncComponent: retry support (c01930e)
compiler-core: export transformElement from compiler-core (#907) (20f4965)
compiler-core: support v-is (b8ffbff)
portal: hydration support for portal disabled mode (b74bab2)
portal: SSR support for multi portal shared target (e866434)
portal: SSR support for portal disabled prop (9ed9bf3)
portal: support disabled prop (8ce3da0)
portal: support multiple portal appending to same target (aafb880)
reactivity: add effect to public api (#909) (6fba241)
runtime-core: config.performance tracing support (e93e426)
runtime-core: emits validation and warnings (c7c3a6a)
runtime-core: failed component resolution should fallback to native element (cb31eb4)
runtime-core: support app.config.globalProperties (27873db)
runtime-core: type and attr fallthrough support for emits option (bf473a6)
templateRef: should work with direct reactive property (449ab03), closes #901
templateRef: support template ref for all vnode types (55b364d)

BREAKING CHANGES

runtime-core: attribute fallthrough behavior has been adjusted according to vuejs/rfcs#154
<portal> has been renamed to <teleport>.

target prop is also renamed to to, so the new usage will be:
```
<Teleport to="#modal-layer" :disabled="isMobile">
  <div class="modal">
    hello
  </div>
</Teleport>
```
The primary reason for the renaming is to avoid potential naming conflict with native portals.
asyncComponent: async component error and loading options have been renamed to errorComponent and loadingComponent respectively.
runtime-core: createAsyncComponent has been renamed to defineAsyncComponent for consistency with defineComponent.

3.0.0-alpha.10 (2020-03-24)

Bug Fixes

fix option merge global mixins presence check (10ad965)
compiler-core: assign patchFlag for template v-if fragment (a1da9c2), closes #850
compiler-core: support interpolation in RCDATA mode (e.g. textarea) (0831b98)
keep-alive: should update re-activated component with latest props (1237387)
reactivity: should not observe frozen objects (1b2149d), closes #867
reactivity: should not trigger map keys iteration when keys did not change (45ba06a), closes #877
runtime-core: fix boolean props validation (3b282e7)
runtime-dom: invalid lineGradient svg tag (#863) (d425818), closes #862
TransitionGroup: ignore comment node when warn (fix#869) (#875) (0dba5d4)
do not drop SFC runtime behavior code in global builds (4c1a193), closes #873
dynamic component fallback to native element (f529dbd), closes #870
runtime-core: fix component proxy props presence check (b3890a9), closes #864
suspense: clear effects on suspense resolve (ebc1ca8)
transition: fix duration prop validation (0dc2478), closes #868

Features

asyncComponent: SSR/hydration support for async component (cba2f1a)
runtime-core: async component support (c3bb316)
runtime-core: support config.optionMergeStrategies (528621b)
add hook for transforming h's arguments (#851) (b7d1e0f)

Performance Improvements

transform-vif: don't need to createBlock for a component (#853) (a3601e9)

3.0.0-alpha.9 (2020-03-16)

Bug Fixes

build: remove RUNTIME_COMPILE flag (206640a), closes #817
compiler-core: fix property shorthand detection (586e5bb), closes #845
compiler-ssr: fix input w/ v-bind="obj" codegen (3b40fc5)
compiler-ssr: should pass necessary tag names for dynamic v-bind (a46f3b3)
runtime-core: always set invalid vnode type (#820) (28a9bee)
runtime-core: empty boolean props (#844) (c7ae269), closes #843
runtime-core: pass instance proxy as data() argument (#828) (d9dd1d8)
runtime-dom: patch xlink attribute (#842) (d318576)
simplify and use correct ctx in withCtx (4dc8ffc)
runtime-core: pass prev value to hostPatchProp (#809) (cd34603), closes #808
runtime-core: should allow empty string and 0 as valid vnode key (#807) (54a0e93)
types: app.component should accept defineComponent return type (#822) (1e9d131), closes #730

Code Refactoring

runtime-core: adjust patchProp value arguments order (ca5f39e)

Features

compiler-core: wrap slot functions with render context (ecd7ce6)
compiler-sfc: add ssr option (3b2d236)
runtime-core: add special property to get class component options (#821) (dd17fa1)
runtime-core: implement RFC-0020 (bb7fa3d)
runtime-core: set context for manual slot functions as well (8a58dce)
server-renderer: render suspense in vnode mode (#727) (589aeb4)
ssr: compiler-ssr support for Suspense (80c625d)
ssr: hide comment anchors during hydration in dev mode (cad5bcc)
ssr: improve fragment mismatch handling (60ed4e7)
ssr: support getSSRProps for vnode directives (c450ede)
ssr/suspense: suspense hydration (a3cc970)
types: export ErrorTypes (#840) (760c3e0)

Reverts

Revert "refactor(directives): remove binding.instance" (2370166)

BREAKING CHANGES

runtime-core: data no longer supports object format (per RFC-0020)
runtime-core: RendererOptions.patchProp arguments order has changed

The prevValue and nextValue position has been swapped to keep it consistent with other functions in the renderer implementation. This only affects custom renderers using the createRenderer API.

3.0.0-alpha.8 (2020-03-06)

Bug Fixes

directives: ignore invalid directive hooks (7971b04), closes #795
portal: fix portal placeholder text (4397528)
reactivity: allow effect trigger inside no-track execution contexts (274f81c), closes #804
reactivity: Map/Set identity methods should work even if raw value contains reactive entries (cc69fd7), closes #799
reactivity: should not trigger length dependency on Array delete (a306658), closes #774
runtime-core: ensure inherited attrs update on optimized child root (6810d14), closes #677 #784
slots: fix conditional slot (3357ff4), closes #787
ssr: fix ssr on-the-fly compilation + slot fallback branch helper injection (3be3785)

Code Refactoring

runtime-core: adjust attr fallthrough behavior (e1660f4), closes #749
runtime-core: revert setup() result reactive conversion (e67f655)

Features

compiler-core: switch to @babel/parser for expression parsing (8449a97)
compiler-ssr: compile portal (#775) (d8ed0e7)
ssr: hydration mismatch handling (91269da)

BREAKING CHANGES

runtime-core: adjust attr fallthrough behavior

Updated per pending RFC vuejs/rfcs#137
- Implicit fallthrough now by default only applies for a whitelist of attributes (class, style, event listeners, a11y attributes, and data attributes).
- Fallthrough is now applied regardless of whether the component has
runtime-core: revert setup() result reactive conversion

Revert 6b10f0c & a840e7d. The motivation of the original change was avoiding unnecessary deep conversions, but that can be achieved by explicitly marking values non-reactive via markNonReactive.

Removing the reactive conversion behavior leads to an usability issue in that plain objects containing refs (which is what most composition functions will return), when exposed as a nested property from setup(), will not unwrap the refs in templates. This goes against the "no .value in template" intuition and the only workaround requires users to manually wrap it again with reactive().

So in this commit we are reverting to the previous behavior where objects returned from setup() are implicitly wrapped with reactive() for deep ref unwrapping.

3.0.0-alpha.7 (2020-02-26)

Bug Fixes

renderSlot: set slot render as a STABLE_FRAGMENT (#776) (8cb0b83), closes #766
runtime-core: fix slot fallback + slots typing (4a5b91b), closes #773
runtime-core: make watchEffect ignore deep option (#765) (19a799c)
runtime-core: set appContext.provides to Object.create(null) (#781) (04f83fa)
template-explorer: rename watch -> watchEffect (#780) (59393dd)
template-ref: fix string template refs inside slots (3eab143)
types: ref value type unwrapping should happen at creation time (d4c6957)
types: shallowRef should not unwrap value type (3206e5d)

Code Refactoring

directives: remove binding.instance (52cc7e8)

BREAKING CHANGES

directives: custom directive bindings no longer expose instance

This is a rarely used property that creates extra complexity in ensuring it points to the correct instance. From a design perspective, a custom directive should be scoped to the element and data it is bound to and should not have access to the entire instance in the first place.

3.0.0-alpha.6 (2020-02-22)

Bug Fixes

compiler-core: should alias name in helperString (#743) (7b987d9), closes #740
compiler-dom: properly stringify class/style bindings when hoisting static strings (1b9b235)
reactivity: should trigger all effects when array length is mutated (#754) (5fac655)
sfc: inherit parent scopeId on child root (#756) (9547c2b)
types: improve ref typing, close #759 (627b9df)
types: update setup binding unwrap types for 6b10f0c (a840e7d), closes #738

Code Refactoring

preserve refs in reactive arrays (775a7c2), closes #737

Features

reactivity: expose unref and shallowRef (e9024bf)
runtime-core: add watchEffect API (99a2e18)

Performance Improvements

effect: optimize effect trigger for array length mutation (#761) (76c7f54)
reactivity: only trigger all effects on Array length mutation if new length is shorter than old length (33622d6)

BREAKING CHANGES

runtime-core: replace watch(fn, options?) with watchEffect

The watch(fn, options?) signature has been replaced by the new watchEffect API, which has the same usage and behavior. watch now only supports the watch(source, cb, options?) signature.
reactivity: reactive arrays no longer unwraps contained refs

When reactive arrays contain refs, especially a mix of refs and plain values, Array prototype methods will fail to function properly - e.g. sort() or reverse() will overwrite the ref's value instead of moving it (see #737).

Ensuring correct behavior for all possible Array methods while retaining the ref unwrapping behavior is exceedingly complicated; In addition, even if Vue handles the built-in methods internally, it would still break when the user attempts to use a 3rd party utility function (e.g. lodash) on a reactive array containing refs.

After this commit, similar to other collection types like Map and Set, Arrays will no longer automatically unwrap contained refs.

The usage of mixed refs and plain values in Arrays should be rare in practice. In cases where this is necessary, the user can create a computed property that performs the unwrapping.

3.0.0-alpha.5 (2020-02-18)

Bug Fixes

compiler: fix v-for fragment openBlock argument (12fcf9a)
compiler-core: fix keep-alive when used in templates (ade07c6), closes #715
compiler-core: only check is prop on <component> (78c4f32)
compiler-core: relax error on unknown entities (730d329), closes #663
compiler-core: should apply text transform to if branches (e0f3c6b), closes #725
compiler-core: should not hoist element with cached + merged event handlers (5455e8e)
compiler-dom: fix duplicated transforms (9e51297)
compiler-sfc: handle empty nodes with src attribute (#695) (2d56dfd)
compiler-ssr: import helpers from correct packages (8f6b669)
computed: support arrow function usage for computed option (2fb7a63), closes #733
reactivity: avoid cross-component dependency leaks in setup() (d9d63f2)
reactivity: effect should handle self dependency mutations (e8e6772)
reactivity: trigger iteration effect on Map.set (e1c9153), closes #709
runtime-core: ensure renderCache always exists (8383e54)
runtime-core: fix keep-alive tree-shaking (5b43764)
runtime-core: fix ShapeFlags tree shaking (0f67aa7)
runtime-core: handle component updates with only class/style bindings (35d91f4)
runtime-core: render context set should not unwrap reactive values (27fbfbd)
runtime-core: rework vnode hooks handling (cfadb98), closes #684
runtime-core: should not return early on text patchFlag (778f3a5)
runtime-core/scheduler: avoid duplicate updates of child component (8a87074)
runtime-core/scheduler: invalidate job (#717) (fe9da2d)
runtime-core/watch: trigger watcher with undefined as initial value (#687) (5742a0b), closes #683
runtime-dom/ssr: properly handle xlink and boolean attributes (e6e2c58)
ssr: avoid hard-coded ssr checks in cjs builds (bc07e95)
ssr: fix class/style rendering + ssrRenderComponent export name (688ad92)
ssr: render components returning render function from setup (#720) (4669215)
transition-group: handle multiple move-classes (#679) (5495c70), closes #678
types: app.component should accept defineComponent return type (57ee5df), closes #730
types: ensure correct oldValue typing based on lazy option (c6a9787), closes #719
v-on: transform click.right and click.middle modifiers (028f748), closes #735
remove effect from public API (4bc4cb9), closes #712
v-model: should use dynamic directive on input with dynamic v-bind (1f2de9e)

Code Refactoring

watch: adjust watch API behavior (9571ede)

Features

compiler: mark hoisted trees with patchFlag (175f8aa)
compiler: warn invalid children for transition and keep-alive (4cc39e1)
compiler-core: support mode: cjs in codegen (04da2a8)
compiler-core/v-on: support @vnode-xxx usage for vnode hooks (571ed42)
compiler-dom: handle constant expressions when stringifying static content (8b7c162)
compiler-dom/runtime-dom: stringify eligible static trees (27913e6)
reactivity: add shallowReactive function (#689) (7f38c1e)
runtime-core/reactivity: expose shallowReactive (#711) (21944c4)
server-renderer: support on-the-fly template compilation (#707) (6d10a6c)
ssr: render portals (#714) (e495fa4)
ssr: support portal hydration (70dc3e3)
ssr: useSSRContext (fd03149)

Performance Improvements

prevent renderer hot functions being inlined by minifiers (629ee75)
reactivity: better computed tracking (#710) (8874b21)

BREAKING CHANGES

watch: watch behavior has been adjusted.
- When using the watch(source, callback, options?) signature, the callback now fires lazily by default (consistent with 2.x behavior).
  
  Note that the watch(effect, options?) signature is still eager, since it must invoke the effect immediately to collect dependencies.
- The lazy option has been replaced by the opposite immediate option, which defaults to false. (It's ignored when using the effect signature)
- Due to the above changes, the watch option in Options API now behaves exactly the same as 2.x.
- When using the effect signature or { immediate: true }, the initial execution is now performed synchronously instead of deferred until the component is mounted. This is necessary for certain use cases to work properly with async setup() and Suspense.
  
  The side effect of this is the immediate watcher invocation will no longer have access to the mounted DOM. However, the watcher can be initiated inside onMounted to retain previous behavior.

3.0.0-alpha.4 (2020-01-27)

Bug Fixes

reactivity: Array methods relying on identity should work with raw values (aefb7d2)
runtime-core: instance should not expose non-declared props (2884831)
runtime-dom: should not access document in non-browser env (48152bc), closes #657
v-model/emit: update:camelCase events should trigger kebab case equivalent (2837ce8), closes #656

Code Refactoring

adjust createApp related API signatures (c07751f)
remove implicit reactive() call on renderContext (6b10f0c)

Performance Improvements

ssr: avoid unnecessary async overhead (297282a)

BREAKING CHANGES

object returned from setup() are no longer implicitly passed to reactive().

The renderContext is the object returned by setup() (or a new object if no setup() is present). Before this change, it was implicitly passed to reactive() for ref unwrapping. But this has the side effect of unnecessary deep reactive conversion on properties that should not be made reactive (e.g. computed return values and injected non-reactive objects), and can lead to performance issues.

This change removes the reactive() call and instead performs a shallow ref unwrapping at the render proxy level. The breaking part is when the user returns an object with a plain property from setup(), e.g. return { count: 0 }, this property will no longer trigger updates when mutated by a in-template event handler. Instead, explicit refs are required.

This also means that any objects not explicitly made reactive in setup() will remain non-reactive. This can be desirable when exposing heavy external stateful objects on this.
createApp API has been adjusted.
- createApp() now accepts the root component, and optionally a props object to pass to the root component.
- app.mount() now accepts a single argument (the root container)
- app.unmount() no longer requires arguments.
New behavior looks like the following:
```
const app = createApp(RootComponent)
app.mount('#app')
app.unmount()
```

3.0.0-alpha.3 (2020-01-22)

Bug Fixes

Suspense should include into dynamic children (#653) (ec63623), closes #649
compiler-core: avoid override user keys when injecting branch key (#630) (aca2c2a)
compiler-core: force <svg> into blocks for correct runtime isSVG (f2ac28b)
compiler-sfc: only transform relative asset URLs (#628) (c71ca35)
dom: fix <svg> and <foreignObject> mount and updates (4f06eeb)
runtime-core: condition for parent node check should be any different nodes (c35fea3), closes #622
runtime-core: isSVG check should also apply for patch branch (035b656), closes #639
runtime-core: should not warn unused attrs when accessed via setup context (751d838), closes #625
transition: handle multiple transition classes (#638) (#645) (98d50d8)

Features

runtime-core: emit now returns array of return values from all triggered handlers (e81c8a3), closes #635
runtime-core: support app.unmount(container) (#601) (04ac6c4), closes #593

3.0.0-alpha.2 (2020-01-13)

Bug Fixes

compiler/v-on: handle multiple statements in v-on handler (close #572) (137893a)
compiler/v-slot: handle implicit default slot mixed with named slots (2ac4b72)
reactivity: should delete observe value (#598) (63a6563), closes #597
runtime-core: allow classes to be passed as plugins (#588) (8f616a8)
runtime-core: should preserve props casing when component has no declared props (bb6a346), closes #583
runtime-core/renderer: fix v-if toggle inside blocks (2e9726e), closes #604 #607
runtime-core/vnode: should not render boolean values in vnode children (close #574) (84dc5a6)
types: components options should accept components defined with defineComponent (#602) (74baea1)
watch: remove recorded effect on manual stop (#590) (453e688)

3.0.0-alpha.1 (2020-01-02)

Bug Fixes

runtime-core: pass options to plugins (#561) (4d20981)
sfc: treat custom block content as raw text (d6275a3)
mounting new children (7d436ab)
core: clone mounted hoisted vnodes on patch (47a6a84)
fragment: perform direct remove when removing fragments (2fdb499)

Features

hmr: root instance reload (eda495e)

Performance Improvements

compiler-core: simplify advancePositionWithMutation (#564) (ad2a0bd)

3.0.0-alpha.0 (2019-12-20)

For changes between 2.x and 3.0 up to this release, please refer to merged RFCs here.

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CHANGELOG.md

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3.0.0 (2020-09-18)

3.0.0-rc.13 (2020-09-18)

Bug Fixes

Code Refactoring

Features

BREAKING CHANGES

3.0.0-rc.12 (2020-09-16)

Bug Fixes

Features

3.0.0-rc.11 (2020-09-15)

Bug Fixes

Features

Performance Improvements

Reverts

3.0.0-rc.10 (2020-09-02)

Bug Fixes

Features

Performance Improvements

3.0.0-rc.9 (2020-08-26)

Bug Fixes

Performance Improvements

3.0.0-rc.8 (2020-08-25)

Bug Fixes

Features

3.0.0-rc.7 (2020-08-21)

Bug Fixes

Performance Improvements

3.0.0-rc.6 (2020-08-19)

Bug Fixes

Features

3.0.0-rc.5 (2020-07-28)

Bug Fixes

Features

BREAKING CHANGES

3.0.0-rc.4 (2020-07-21)

Bug Fixes

3.0.0-rc.3 (2020-07-21)

Bug Fixes

Features

3.0.0-rc.2 (2020-07-19)

Bug Fixes

3.0.0-rc.1 (2020-07-17)

Bug Fixes

Features

3.0.0-beta.24 (2020-07-16)

Bug Fixes

3.0.0-beta.23 (2020-07-16)

Bug Fixes

Features

Performance Improvements

3.0.0-beta.22 (2020-07-15)

Bug Fixes

Features

3.0.0-beta.21 (2020-07-14)

Bug Fixes

Features

3.0.0-beta.20 (2020-07-08)

Bug Fixes

Features

3.0.0-beta.19 (2020-07-07)

Bug Fixes

3.0.0-beta.18 (2020-07-02)

Bug Fixes

Features

3.0.0-beta.17 (2020-06-30)

Bug Fixes

3.0.0-beta.16 (2020-06-29)

Bug Fixes

Features

Performance Improvements

3.0.0-beta.15 (2020-06-12)

Bug Fixes

Features

Performance Improvements