[Snyk] Upgrade esbuild from 0.19.12 to 0.20.2 #537
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This PR was automatically created by Snyk using the credentials of a real user.
Snyk has created this PR to upgrade esbuild from 0.19.12 to 0.20.2.
ℹ️ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.
Release notes
Package name: esbuild
Support TypeScript experimental decorators on
abstract
class fields (#3684)With this release, you can now use TypeScript experimental decorators on
abstract
class fields. This was silently compiled incorrectly in esbuild 0.19.7 and below, and was an error from esbuild 0.19.8 to esbuild 0.20.1. Code such as the following should now work correctly:const log = (x: any, y: string) => console.log(y)
abstract class Foo { @log abstract foo: string }
new class extends Foo { foo = '' }
// Old output (with --loader=ts --tsconfig-raw={"compilerOptions":{"experimentalDecorators":true}})
const log = (x, y) => console.log(y);
class Foo {
}
new class extends Foo {
foo = "";
}();
// New output (with --loader=ts --tsconfig-raw={"compilerOptions":{"experimentalDecorators":true}})
const log = (x, y) => console.log(y);
class Foo {
}
__decorateClass([
log
], Foo.prototype, "foo", 2);
new class extends Foo {
foo = "";
}();
JSON loader now preserves
__proto__
properties (#3700)Copying JSON source code into a JavaScript file will change its meaning if a JSON object contains the
__proto__
key. A literal__proto__
property in a JavaScript object literal sets the prototype of the object instead of adding a property named__proto__
, while a literal__proto__
property in a JSON object literal just adds a property named__proto__
. With this release, esbuild will now work around this problem by converting JSON to JavaScript with a computed property key in this case:import data from 'data:application/json,{"proto":{"fail":true}}'
if (Object.getPrototypeOf(data)?.fail) throw 'fail'
// Old output (with --bundle)
(() => {
// <data:application/json,{"proto":{"fail":true}}>
var json_proto_fail_true_default = { proto: { fail: true } };
// entry.js
if (Object.getPrototypeOf(json_proto_fail_true_default)?.fail)
throw "fail";
})();
// New output (with --bundle)
(() => {
// <data:application/json,{"proto":{"fail":true}}>
var json_proto_fail_true_default = { ["proto"]: { fail: true } };
// example.mjs
if (Object.getPrototypeOf(json_proto_fail_true_default)?.fail)
throw "fail";
})();
Improve dead code removal of
switch
statements (#3659)With this release, esbuild will now remove
switch
statements in branches when minifying if they are known to never be evaluated:if (true) foo(); else switch (bar) { case 1: baz(); break }
// Old output (with --minify)
if(1)foo();else switch(bar){case 1:}
// New output (with --minify)
foo();
Empty enums should behave like an object literal (#3657)
TypeScript allows you to create an empty enum and add properties to it at run time. While people usually use an empty object literal for this instead of a TypeScript enum, esbuild's enum transform didn't anticipate this use case and generated
undefined
instead of{}
for an empty enum. With this release, you can now use an empty enum to generate an empty object literal.enum Foo {}
// Old output (with --loader=ts)
var Foo = /* @ PURE */ ((Foo2) => {
})(Foo || {});
// New output (with --loader=ts)
var Foo = /* @ PURE */ ((Foo2) => {
return Foo2;
})(Foo || {});
Handle Yarn Plug'n'Play edge case with
tsconfig.json
(#3698)Previously a
tsconfig.json
file thatextends
another file in a package with anexports
map failed to work when Yarn's Plug'n'Play resolution was active. This edge case should work now starting with this release.Work around issues with Deno 1.31+ (#3682)
Version 0.20.0 of esbuild changed how the esbuild child process is run in esbuild's API for Deno. Previously it used
Deno.run
but that API is being removed in favor ofDeno.Command
. As part of this change, esbuild is now calling the newunref
function on esbuild's long-lived child process, which is supposed to allow Deno to exit when your code has finished running even though the child process is still around (previously you had to explicitly call esbuild'sstop()
function to terminate the child process for Deno to be able to exit).However, this introduced a problem for Deno's testing API which now fails some tests that use esbuild with
error: Promise resolution is still pending but the event loop has already resolved
. It's unclear to me why this is happening. The call tounref
was recommended by someone on the Deno core team, and calling Node's equivalentunref
API has been working fine for esbuild in Node for a long time. It could be that I'm using it incorrectly, or that there's some reference counting and/or garbage collection bug in Deno's internals, or that Deno'sunref
just works differently than Node'sunref
. In any case, it's not good for Deno tests that use esbuild to be failing.In this release, I am removing the call to
unref
to fix this issue. This means that you will now have to call esbuild'sstop()
function to allow Deno to exit, just like you did before esbuild version 0.20.0 when this regression was introduced.Note: This regression wasn't caught earlier because Deno doesn't seem to fail tests that have outstanding
setTimeout
calls, which esbuild's test harness was using to enforce a maximum test runtime. Adding asetTimeout
was allowing esbuild's Deno tests to succeed. So this regression doesn't necessarily apply to all people using tests in Deno.Read more
This release deliberately contains backwards-incompatible changes. To avoid automatically picking up releases like this, you should either be pinning the exact version of
esbuild
in yourpackage.json
file (recommended) or be using a version range syntax that only accepts patch upgrades such as^0.19.0
or~0.19.0
. See npm's documentation about semver for more information.This time there is only one breaking change, and it only matters for people using Deno. Deno tests that use esbuild will now fail unless you make the change described below.
Work around API deprecations in Deno 1.40.x (#3609, #3611)
Deno 1.40.0 was just released and introduced run-time warnings about certain APIs that esbuild uses. With this release, esbuild will work around these run-time warnings by using newer APIs if they are present and falling back to the original APIs otherwise. This should avoid the warnings without breaking compatibility with older versions of Deno.
Unfortunately, doing this introduces a breaking change. The newer child process APIs lack a way to synchronously terminate esbuild's child process, so calling
esbuild.stop()
from within a Deno test is no longer sufficient to prevent Deno from failing a test that uses esbuild's API (Deno fails tests that create a child process without killing it before the test ends). To work around this, esbuild'sstop()
function has been changed to return a promise, and you now have to changeesbuild.stop()
toawait esbuild.stop()
in all of your Deno tests.Reorder implicit file extensions within
node_modules
(#3341, #3608)In version 0.18.0, esbuild changed the behavior of implicit file extensions within
node_modules
directories (i.e. in published packages) to prefer.js
over.ts
even when the--resolve-extensions=
order prefers.ts
over.js
(which it does by default). However, doing that also accidentally made esbuild prefer.css
over.ts
, which caused problems for people that published packages containing both TypeScript and CSS in files with the same name.With this release, esbuild will reorder TypeScript file extensions immediately after the last JavaScript file extensions in the implicit file extension order instead of putting them at the end of the order. Specifically the default implicit file extension order is
.tsx,.ts,.jsx,.js,.css,.json
which used to become.jsx,.js,.css,.json,.tsx,.ts
innode_modules
directories. With this release it will now become.jsx,.js,.tsx,.ts,.css,.json
instead.Why even rewrite the implicit file extension order at all? One reason is because the
.js
file is more likely to behave correctly than the.ts
file. The behavior of the.ts
file may depend ontsconfig.json
and thetsconfig.json
file may not even be published, or may useextends
to refer to a basetsconfig.json
file that wasn't published. People can get into this situation when they forget to add all.ts
files to their.npmignore
file before publishing to npm. Picking.js
over.ts
helps make it more likely that resulting bundle will behave correctly.Read more
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