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Generate declaration files for js files if allowJs is set to true (#1483)
* Fixes #1260 by generating declaration files for js files if allowJs is set to true. * Fix declarationOutputAllowJs test Update expected test output for 4.7 and stabilize expectation to be OS independent. * Update package.json and CHANGELOG.md for 9.3.1 * Update CHANGELOG.md Co-authored-by: John Reilly <johnny_reilly@hotmail.com> Co-authored-by: Henning Dieterichs <henning.dieterichs@live.de> Co-authored-by: John Reilly <johnny_reilly@hotmail.com>
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‎CHANGELOG.md‎

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# Changelog
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## v9.3.1
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* [Bug fix: Generate declaration files for js files if allowJs is set to true](https://github.com/TypeStrong/ts-loader/pull/1483) [#1260] - thanks @hediet and @mvilliger
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## v9.3.0
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* [simplify configuration for fork-ts-checker-webpack-plugin](https://github.com/TypeStrong/ts-loader/pull/1451) - thanks @piotr-oles

‎package.json‎

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{
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"name": "ts-loader",
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"version": "9.3.0",
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"version": "9.3.1",
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"description": "TypeScript loader for webpack",
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"main": "index.js",
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"types": "dist",

‎src/after-compile.ts‎

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}
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/**
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* gather all declaration files from TypeScript and output them to webpack
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* gather all declaration files from TypeScript and output them to webpack.
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* JavaScript declaration files are included if `allowJs` is set.
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*/
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function provideDeclarationFilesToWebpack(
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filesToCheckForErrors: TSFiles,
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instance: TSInstance,
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compilation: webpack.Compilation
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) {
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const filePathRegex =
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instance.compilerOptions.allowJs === true
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? constants.dtsTsTsxJsJsxRegex
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: constants.dtsTsTsxRegex;
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for (const { fileName } of filesToCheckForErrors.values()) {
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if (fileName.match(constants.tsTsxRegex) === null) {
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if (fileName.match(filePathRegex) === null) {
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continue;
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}
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‎test/comparison-tests/declarationOutputAllowJs/app.ts‎

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import dep = require('./sub/dep');
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class Test {
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private _field?: dep;
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}
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export = Test;

‎test/comparison-tests/declarationOutputAllowJs/expectedOutput-4.7/.output/app.d.ts‎

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declare class Test {
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private _field?;
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}
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export = Test;

‎test/comparison-tests/declarationOutputAllowJs/expectedOutput-4.7/.output/sub/dep.d.ts‎

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export class Test {
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/**
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* @param {number} x
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*/
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doSomething(x: number): number;
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}

‎test/comparison-tests/declarationOutputAllowJs/expectedOutput-4.7/bundle.js‎

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/*
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* ATTENTION: The "eval" devtool has been used (maybe by default in mode: "development").
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* This devtool is neither made for production nor for readable output files.
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* It uses "eval()" calls to create a separate source file in the browser devtools.
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* If you are trying to read the output file, select a different devtool (https://webpack.js.org/configuration/devtool/)
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* or disable the default devtool with "devtool: false".
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* If you are looking for production-ready output files, see mode: "production" (https://webpack.js.org/configuration/mode/).
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*/
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/******/ (() => { // webpackBootstrap
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/******/ "use strict";
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/******/ var __webpack_modules__ = ({
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/***/ "./app.ts":
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/*!****************!*\
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!*** ./app.ts ***!
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\****************/
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/***/ ((module) => {
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eval("\nvar Test = /** @class */ (function () {\n function Test() {\n }\n return Test;\n}());\nmodule.exports = Test;\n\n\n//# sourceURL=webpack:///./app.ts?");
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/***/ })
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/******/ });
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/************************************************************************/
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/******/ // The module cache
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/******/ var __webpack_module_cache__ = {};
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/******/
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/******/ // The require function
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/******/ function __webpack_require__(moduleId) {
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/******/ // Check if module is in cache
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/******/ var cachedModule = __webpack_module_cache__[moduleId];
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/******/ if (cachedModule !== undefined) {
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/******/ return cachedModule.exports;
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/******/ }
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/******/ // Create a new module (and put it into the cache)
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/******/ var module = __webpack_module_cache__[moduleId] = {
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/******/ // no module.id needed
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/******/ // no module.loaded needed
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/******/ exports: {}
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/******/ };
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/******/
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/******/ // Execute the module function
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/******/ __webpack_modules__[moduleId](module, module.exports, __webpack_require__);
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/******/
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/******/ // Return the exports of the module
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/******/ return module.exports;
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/******/ }
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/******/
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/************************************************************************/
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/******/
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/******/ // startup
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/******/ // Load entry module and return exports
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/******/ // This entry module is referenced by other modules so it can't be inlined
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/******/ var __webpack_exports__ = __webpack_require__("./app.ts");
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/******/
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/******/ })()
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;

‎test/comparison-tests/declarationOutputAllowJs/expectedOutput-4.7/output.txt‎

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asset bundle.js 2.19 KiB [emitted] (name: main)
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asset .output/sub/dep.d.ts 99 bytes [emitted]
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asset .output/app.d.ts 59 bytes [emitted]
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./app.ts 128 bytes [built] [code generated] [1 error]
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ERROR in app.ts
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./app.ts 4:18-21
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[tsl] ERROR in app.ts(4,19)
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 TS2709: Cannot use namespace 'dep' as a type.
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ts-loader-default_609318b4f68865d3
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webpack compiled with 1 error

‎test/comparison-tests/declarationOutputAllowJs/expectedOutput-transpile-4.7/bundle.js‎

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/*
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* ATTENTION: The "eval" devtool has been used (maybe by default in mode: "development").
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* This devtool is neither made for production nor for readable output files.
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* It uses "eval()" calls to create a separate source file in the browser devtools.
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* If you are trying to read the output file, select a different devtool (https://webpack.js.org/configuration/devtool/)
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* or disable the default devtool with "devtool: false".
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* If you are looking for production-ready output files, see mode: "production" (https://webpack.js.org/configuration/mode/).
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*/
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/******/ (() => { // webpackBootstrap
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/******/ "use strict";
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/******/ var __webpack_modules__ = ({
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/***/ "./app.ts":
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/*!****************!*\
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!*** ./app.ts ***!
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\****************/
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/***/ ((module) => {
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eval("\nvar Test = /** @class */ (function () {\n function Test() {\n }\n return Test;\n}());\nmodule.exports = Test;\n\n\n//# sourceURL=webpack:///./app.ts?");
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/***/ })
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/******/ });
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/************************************************************************/
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/******/ // The module cache
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/******/ var __webpack_module_cache__ = {};
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/******/
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/******/ // The require function
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/******/ function __webpack_require__(moduleId) {
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/******/ // Check if module is in cache
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/******/ var cachedModule = __webpack_module_cache__[moduleId];
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/******/ if (cachedModule !== undefined) {
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/******/ return cachedModule.exports;
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/******/ }
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/******/ // Create a new module (and put it into the cache)
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/******/ var module = __webpack_module_cache__[moduleId] = {
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/******/ // no module.id needed
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/******/ // no module.loaded needed
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/******/ exports: {}
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/******/ };
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/******/
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/******/ // Execute the module function
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/******/ __webpack_modules__[moduleId](module, module.exports, __webpack_require__);
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/******/
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/******/ // Return the exports of the module
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/******/ return module.exports;
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/******/ }
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/******/
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/************************************************************************/
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/******/
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/******/ // startup
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/******/ // Load entry module and return exports
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/******/ // This entry module is referenced by other modules so it can't be inlined
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/******/ var __webpack_exports__ = __webpack_require__("./app.ts");
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/******/
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/******/ })()
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;

‎test/comparison-tests/declarationOutputAllowJs/expectedOutput-transpile-4.7/output.txt‎

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asset bundle.js 2.19 KiB [emitted] (name: main)
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./app.ts 128 bytes [built] [code generated]
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webpack compiled successfully

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