feat!: migrate to native esm

package.json

@@ -1,44 +1,44 @@
 {
   "name": "test-drive",
   "version": "1.6.0",
+  "type": "module",
   "description": "Opinionated library for writing web component tests",
-  "main": "./cjs/index.js",
-  "module": "./esm/index.js",
-  "types": "./esm/index.d.ts",
+  "exports": {
+    ".": "./dist/index.js",
+    "./package.json": "./package.json"
+  },
   "scripts": {
-    "clean": "rimraf ./cjs ./esm",
+    "clean": "rimraf ./dist",
     "prebuild": "npm run clean",
-    "build": "npm run build:cjs && npm run build:esm",
-    "build:cjs": "tsc -p tsconfig.build.json --outDir cjs --module commonjs",
-    "build:esm": "tsc -p tsconfig.build.json --outDir esm --module esnext",
+    "build": "tsc",
     "pretest": "npm run typecheck && npm run lint",
-    "test": "mocha-web \"./test/**/*.spec.ts\"",
+    "test": "mocha-web \"./src/test/**/*.spec.ts\"",
     "lint": "eslint",
     "typecheck": "tsc --noEmit",
     "prepack": "npm run build"
   },
   "dependencies": {
-    "chai": "^4.5.0",
-    "chai-as-promised": "^7.1.2",
+    "chai": "^5.1.2",
+    "chai-as-promised": "^8.0.1",
     "chai-dom": "^1.12.0",
     "chai-style": "^1.0.3",
     "dom-matches": "^2.0.0",
     "promise-assist": "^2.0.1",
     "sinon": "^19.0.2",
-    "sinon-chai": "^3.7.0"
+    "sinon-chai": "^4.0.0"
   },
   "devDependencies": {
     "@playwright/browser-chromium": "^1.49.1",
-    "@types/chai": "^4.3.20",
-    "@types/chai-as-promised": "^7.1.8",
+    "@types/chai": "^5.0.1",
+    "@types/chai-as-promised": "^8.0.1",
     "@types/chai-dom": "^1.11.3",
     "@types/chai-style": "^1.0.2",
     "@types/dom-matches": "^2.0.2",
     "@types/mocha": "^10.0.10",
     "@types/sinon": "^17.0.3",
-    "@types/sinon-chai": "^3.2.12",
+    "@types/sinon-chai": "^4.0.0",
     "esbuild": "^0.24.0",
-    "eslint": "^9.16.0",
+    "eslint": "^9.17.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-no-only-tests": "^3.3.0",
     "mocha": "^11.0.1",
@@ -49,10 +49,10 @@
     "typescript-eslint": "^8.18.0"
   },
   "files": [
-    "cjs",
-    "esm",
+    "dist",
     "src",
-    "matchers.d.ts"
+    "matchers.d.ts",
+    "!*/test"
   ],
   "repository": {
     "type": "git",

src/index.ts

@@ -2,13 +2,13 @@
 /// <reference path="../matchers.d.ts" preserve="true" />
 
 import sinon from 'sinon';
-import chai from 'chai';
+import * as chai from 'chai';
 import chaiDom from 'chai-dom';
-import isPresent from './is-present';
+import isPresent from './is-present.js';
 import chaiAsPromised from 'chai-as-promised';
 import chaiStyle from 'chai-style';
 import sinonChai from 'sinon-chai';
-import layout from './layout';
+import layout from './layout.js';
 
 export * from 'promise-assist';
 
@@ -24,9 +24,9 @@ if (typeof window !== 'undefined') {
 
 const expect: Chai.ExpectStatic = Object.assign(chai.expect.bind(chai), chai.expect);
 
-export * from './helpers';
-export * from './layout';
-export * from './layout-driver';
-export * from './select-dom';
+export * from './helpers.js';
+export * from './layout.js';
+export * from './layout-driver.js';
+export * from './select-dom.js';
 
 export { chai, sinon, expect, layout };

src/is-present.ts

@@ -1,4 +1,4 @@
-import { isElement } from './helpers';
+import { isElement } from './helpers.js';
 
 function isPresent(element: unknown): boolean {
     return (

src/layout.ts

@@ -1,4 +1,4 @@
-import { isElement } from './helpers';
+import { isElement } from './helpers.js';
 
 interface Point {
     x: number;

test/is-present.spec.ts → src/test/is-present.spec.ts

@@ -1,4 +1,4 @@
-import { expect } from '../src';
+import { expect } from '../index.js';
 
 describe('isPresent() matcher detects', function () {
     this.timeout(5_000);

test/layout-test-driver.spec.ts → src/test/layout-test-driver.spec.ts

@@ -1,4 +1,4 @@
-import { expect, generateMap, dom, type Geometry } from '../src';
+import { expect, generateMap, dom, type Geometry } from '../index.js';
 
 describe('Layout test driver', function () {
     const source = `

test/layout.spec.ts → src/test/layout.spec.ts

@@ -1,6 +1,6 @@
 /* eslint-disable @typescript-eslint/no-explicit-any, @typescript-eslint/no-unsafe-return, @typescript-eslint/no-unsafe-call, @typescript-eslint/no-unsafe-member-access */
 
-import { expect, getLayoutFixture, detectMisalignment } from '../src';
+import { expect, getLayoutFixture, detectMisalignment } from '../index.js';
 
 describe('Layout matchers', function () {
     describe('detect placement', function () {

test/select-dom.spec.ts → src/test/select-dom.spec.ts

@@ -1,4 +1,4 @@
-import { selectDom, expect } from '../src';
+import { selectDom, expect } from '../index.js';
 
 function textContent(element: Element | null) {
     return element && element.textContent;

tsconfig.json

@@ -11,8 +11,8 @@
     // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
 
     /* Language and Environment */
-    "target": "es2020",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
-    "lib": ["es2020", "dom", "dom.iterable"],            /* Specify a set of bundled library declaration files that describe the target runtime environment. */
+    "target": "es2023",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    "lib": ["es2023", "dom", "dom.iterable"],            /* Specify a set of bundled library declaration files that describe the target runtime environment. */
     // "jsx": "preserve",                                /* Specify what JSX code is generated. */
     // "experimentalDecorators": true,                   /* Enable experimental support for legacy experimental decorators. */
     // "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */
@@ -25,20 +25,22 @@
     // "moduleDetection": "auto",                        /* Control what method is used to detect module-format JS files. */
 
     /* Modules */
-    "module": "esnext",                                  /* Specify what module code is generated. */
+    "module": "node16",                                  /* Specify what module code is generated. */
     // "rootDir": "./",                                  /* Specify the root folder within your source files. */
-    "moduleResolution": "node",                          /* Specify how TypeScript looks up a file from a given module specifier. */
+    "moduleResolution": "node16",                        /* Specify how TypeScript looks up a file from a given module specifier. */
     // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
     // "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
     // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
     // "typeRoots": [],                                  /* Specify multiple folders that act like './node_modules/@types'. */
-    "types": ["mocha"],                                 /* Specify type package names to be included without being referenced in a source file. */
+    "types": ["mocha"],                                  /* Specify type package names to be included without being referenced in a source file. */
     // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
     // "moduleSuffixes": [],                             /* List of file name suffixes to search when resolving a module. */
     // "allowImportingTsExtensions": true,               /* Allow imports to include TypeScript file extensions. Requires '--moduleResolution bundler' and either '--noEmit' or '--emitDeclarationOnly' to be set. */
+    // "rewriteRelativeImportExtensions": true,          /* Rewrite '.ts', '.tsx', '.mts', and '.cts' file extensions in relative import paths to their JavaScript equivalent in output files. */
     // "resolvePackageJsonExports": true,                /* Use the package.json 'exports' field when resolving package imports. */
     // "resolvePackageJsonImports": true,                /* Use the package.json 'imports' field when resolving imports. */
     // "customConditions": [],                           /* Conditions to set in addition to the resolver-specific defaults when resolving imports. */
+    // "noUncheckedSideEffectImports": true,             /* Check side effect imports. */
     // "resolveJsonModule": true,                        /* Enable importing .json files. */
     // "allowArbitraryExtensions": true,                 /* Enable importing files with any extension, provided a declaration file is present. */
     // "noResolve": true,                                /* Disallow 'import's, 'require's or '<reference>'s from expanding the number of files TypeScript should add to a project. */
@@ -54,28 +56,27 @@
     // "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
     "sourceMap": true,                                   /* Create source map files for emitted JavaScript files. */
     // "inlineSourceMap": true,                          /* Include sourcemap files inside the emitted JavaScript. */
+    // "noEmit": true,                                   /* Disable emitting files from a compilation. */
     // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */
-    // "outDir": "./",                                   /* Specify an output folder for all emitted files. */
+    "outDir": "./dist",                                  /* Specify an output folder for all emitted files. */
     // "removeComments": true,                           /* Disable emitting comments. */
-    // "noEmit": true,                                   /* Disable emitting files from a compilation. */
     // "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
-    // "importsNotUsedAsValues": "remove",               /* Specify emit/checking behavior for imports that are only used for types. */
     // "downlevelIteration": true,                       /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
     // "sourceRoot": "",                                 /* Specify the root path for debuggers to find the reference source code. */
     // "mapRoot": "",                                    /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSources": true,                            /* Include source code in the sourcemaps inside the emitted JavaScript. */
     // "emitBOM": true,                                  /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */
-    "newLine": "lf",                                     /* Set the newline character for emitting files. */
+    // "newLine": "crlf",                                /* Set the newline character for emitting files. */
     // "stripInternal": true,                            /* Disable emitting declarations that have '@internal' in their JSDoc comments. */
     // "noEmitHelpers": true,                            /* Disable generating custom helper functions like '__extends' in compiled output. */
     // "noEmitOnError": true,                            /* Disable emitting files if any type checking errors are reported. */
     // "preserveConstEnums": true,                       /* Disable erasing 'const enum' declarations in generated code. */
     // "declarationDir": "./",                           /* Specify the output directory for generated declaration files. */
-    // "preserveValueImports": true,                     /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */
 
     /* Interop Constraints */
     // "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
-    // "verbatimModuleSyntax": true,                     /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */
+    "verbatimModuleSyntax": true,                        /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */
+    // "isolatedDeclarations": true,                     /* Require sufficient annotation on exports so other tools can trivially generate declaration files. */
     // "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
     "esModuleInterop": true,                             /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
     // "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
@@ -88,6 +89,7 @@
     // "strictFunctionTypes": true,                      /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
     // "strictBindCallApply": true,                      /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */
     // "strictPropertyInitialization": true,             /* Check for class properties that are declared but not set in the constructor. */
+    // "strictBuiltinIteratorReturn": true,              /* Built-in iterators are instantiated with a 'TReturn' type of 'undefined' instead of 'any'. */
     // "noImplicitThis": true,                           /* Enable error reporting when 'this' is given the type 'any'. */
     // "useUnknownInCatchVariables": true,               /* Default catch clause variables as 'unknown' instead of 'any'. */
     // "alwaysStrict": true,                             /* Ensure 'use strict' is always emitted. */