如何为生产模式正确构建 Angular 8 和 ckeditor5-angular？

Question

我一直被困在一个涉及 Angular 6 到 8 的奇怪问题上（我从 Angular 6 开始迁移到 7，然后迁移到 8，我认为这可能已经通过更新的库解决了，并发现我错了）结合 ckeditor5-angular 模块和 ckeditor5-classic-build 编辑器的自定义构建。

自定义构建中唯一添加的是对齐按钮的对齐插件。

一切都在开发模式下完美运行，没有任何错误..这是我问题的根源。在 --prod 构建中，我得到了无法在开发模式下重现的难以辨认的堆栈跟踪：

zl/i<@https://v5.staging.amateurwriting.net/main-es2015.c0032bd3a584c0b5d808.js:1:342042
zl@https://v5.staging.amateurwriting.net/main-es2015.c0032bd3a584c0b5d808.js:1:342142
Vl@https://v5.staging.amateurwriting.net/main-es2015.c0032bd3a584c0b5d808.js:1:341944
jl/<@https://v5.staging.amateurwriting.net/main-es2015.c0032bd3a584c0b5d808.js:1:341872
change@https://v5.staging.amateurwriting.net/main-es2015.c0032bd3a584c0b5d808.js:1:201004
jl@https://v5.staging.amateurwriting.net/main-es2015.c0032bd3a584c0b5d808.js:1:341862
_initPlaceholder@https://v5.staging.amateurwriting.net/main-es2015.c0032bd3a584c0b5d808.js:1:344731
init@https://v5.staging.amateurwriting.net/main-es2015.c0032bd3a584c0b5d808.js:1:343575
create/</<@https://v5.staging.amateurwriting.net/main-es2015.c0032bd3a584c0b5d808.js:1:361312
invoke@https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1:43382
run@https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1:38884
A/<@https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1:49712
invokeTask@https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1:44000
runTask@https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1:39499
y@https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1:45945
invokeTask@https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1:45030
v@https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1:56978
b@https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1:57299
main-es2015.c0032bd3a584c0b5d808.js:1:968675
    createEditor https://v5.staging.amateurwriting.net/main-es2015.c0032bd3a584c0b5d808.js:1
    invoke https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1
    run https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1
    A https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1
    invokeTask https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1
    runTask https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1
    y https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1
    invokeTask https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1
    v https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1
    b https://v5.staging.amateurwriting.net/polyfills-es2015.5cb7d8167823e5b15eaf.js:1

我在 Github 上遇到过很多不同的问题，这些问题看起来可能是相关的，但是 none 中的解决方案是有效的。我已将我的 tsconfig.json 设置为使用 es6/es2015（ckeditor5 不支持 es5，对此我没意见，我也不想支持它）并添加了 allowJs: true 选项正如 ckeditor5 的问题中提到的那样，但是这个堆栈跟踪永远不会改变，而且我永远无法在开发模式下重现它。

我该怎么做才能找到问题的根源？有人见过这个吗？当我指定 es6 构建目标时，如何阻止 Angular 生成 es5 工件？它仍在构建它们..但是它们似乎没有在 Firefox 中加载所以我很确定它们不会导致我看到的问题，但我也很确定它们不会工作因为 ckeditor5 只是 es6+ .

tsconfig.json:

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "downlevelIteration": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "module": "esnext",
    "moduleResolution": "node",
    "importHelpers": true,
    "target": "es2015",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2018",
      "dom"
    ]
  }
}

polyfills.ts:

/**
 * This file includes polyfills needed by Angular and is loaded before the app.
 * You can add your own extra polyfills to this file.
 *
 * This file is divided into 2 sections:
 *   1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
 *   2. Application imports. Files imported after ZoneJS that should be loaded before your main
 *      file.
 *
 * The current setup is for so-called "evergreen" browsers; the last versions of browsers that
 * automatically update themselves. This includes Safari >= 10, Chrome >= 55 (including Opera),
 * Edge >= 13 on the desktop, and iOS 10 and Chrome on mobile.
 *
 * Learn more in https://angular.io/guide/browser-support
 */

/***************************************************************************************************
 * BROWSER POLYFILLS
 */

/** IE10 and IE11 requires the following for NgClass support on SVG elements */
// import 'classlist.js';  // Run `npm install --save classlist.js`.

/**
 * Web Animations `@angular/platform-browser/animations`
 * Only required if AnimationBuilder is used within the application and using IE/Edge or Safari.
 * Standard animation support in Angular DOES NOT require any polyfills (as of Angular 6.0).
 */
// import 'web-animations-js';  // Run `npm install --save web-animations-js`.

/**
 * By default, zone.js will patch all possible macroTask and DomEvents
 * user can disable parts of macroTask/DomEvents patch by setting following flags
 * because those flags need to be set before `zone.js` being loaded, and webpack
 * will put import in the top of bundle, so user need to create a separate file
 * in this directory (for example: zone-flags.ts), and put the following flags
 * into that file, and then add the following code before importing zone.js.
 * import './zone-flags.ts';
 *
 * The flags allowed in zone-flags.ts are listed here.
 *
 * The following flags will work for all browsers.
 *
 * (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
 * (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
 * (window as any).__zone_symbol__UNPATCHED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
 *
 *  in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
 *  with the following flag, it will bypass `zone.js` patch for IE/Edge
 *
 *  (window as any).__Zone_enable_cross_context_check = true;
 *
 */

/***************************************************************************************************
 * Zone JS is required by default for Angular itself.
 */
import 'zone.js/dist/zone.js';  // Included with Angular CLI.
(window as any).__Zone_disable_toString = true; // Zone will not patch Function.prototype.toString

/***************************************************************************************************
 * APPLICATION IMPORTS
 */

更新：

我用 --optimization=false 重新运行构建以尝试查看实际错误是什么，它消失了..所以这似乎与 uglifyjs 有关，但不确定如何。

Answer 1

找到CKEditor5在产品中不工作的原因：

在angular.json中你必须设置：

...
"optimization: true",
"buildOptimizer": false,
...

buildOptimizer 重命名破坏 CKEditor5 的函数，通过禁用它它在 Angular 6,7,8 中工作。我猜 CKEditor 正在使用命名函数查找，编译过程中缺少 UglifyJS。 Angular 已决定默认启用此选项。

但是警告，这使我的 es2015 prod 构建的大小增加了 270kb。

我已经测试并发现它可以工作并解决 Angular 6、7 和 8 中的问题。

相关的 Angular 问题在这里：https://github.com/angular/angular-cli/issues/11439

如何为生产模式正确构建 Angular 8 和 ckeditor5-angular？

How to properly build Angular 8 and ckeditor5-angular for prod mode?

angular

ckeditor5

更新：