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node.js - Angular 7：未捕获的 ReferenceError：添加包时未定义全局

问题描述

我正在构建一个 Angular 7 应用程序，当我添加一个包npm install dragula --save并将其导入pollyfills.ts文件时，我收到此错误：

index.js:2 Uncaught ReferenceError: global is not defined at Object../node_modules/custom-event/index.js (index.js:2) at webpack_require (bootstrap:83) at Object../node_modules/crossvent/src /crossvent.js (crossvent.js:3) 在webpack_require (bootstrap:83) 在 Object../node_modules/dragula/dragula.js (dragula.js:4) 在webpack_require (bootstrap:83) 在 Module../src /polyfills.ts (polyfills.ts:1) 在webpack_require (bootstrap:83) 在 Object.1 (polyfills.ts:92) 在webpack_require (bootstrap:83)

当我用谷歌搜索时，每个人都说要添加这个(window as any).global = window;，pollyfills.ts我已经这样做了，但我仍然得到错误。我也准备删除 node_modules 文件夹，npm i我也这样做了。

我不知道在这里还能做什么。谁能告诉我一些建议或至少解释为什么会发生这种情况？

这可能不相关，但我也会添加它。在我将它们导入之前还有另一个错误pollyfills.ts

Accordion-group.component.ts:9 Uncaught ReferenceError: global is not defined at Module../src/app/components/accordion/accordion-group.component.ts (accordion-group.component.ts:9) at webpack_require ( bootstrap:83) 在 Module../src/app/components/accordion/accordion.module.ts (accordion.component.ts:10) 在webpack_require (bootstrap:83) 在 Module../src/app/shared/shared .module.ts (window.extensions.ts:15) 在webpack_require (bootstrap:83) 在 Module../src/app/app.module.ts (app.constants.ts:17) 在webpack_require (bootstrap:83)在 Module../src/main.ts (main.ts:1) 在webpack_require (bootstrap:83)

标签： node.jsangulartypescriptdragulang2-dragula

解决方案

几周前我遇到了类似的问题，现在我在 polyfills.ts 中更改了一些设置时解决了它看起来像：

/**
 * 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/docs/ts/latest/guide/browser-support.html
 */

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

/** IE9, IE10 and IE11 requires all of the following polyfills. **/
// import 'core-js/es6/symbol';
// import 'core-js/es6/object';
// import 'core-js/es6/function';
// import 'core-js/es6/parse-int';
// import 'core-js/es6/parse-float';
// import 'core-js/es6/number';
// import 'core-js/es6/math';
// import 'core-js/es6/string';
// import 'core-js/es6/date';
// import 'core-js/es6/array';
// import 'core-js/es6/regexp';
// import 'core-js/es6/map';
// import 'core-js/es6/weak-map';
// import 'core-js/es6/set';

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

/** IE10 and IE11 requires the following for the Reflect API. */
// import 'core-js/es6/reflect';


/** Evergreen browsers require these. **/
// Used for reflect-metadata in JIT. If you use AOT (and only Angular decorators), you can remove.
import 'core-js/es7/reflect';


/**
 * Required to support Web Animations `@angular/platform-browser/animations`.
 * Needed for: All but Chrome, Firefox and Opera. http://caniuse.com/#feat=web-animation
 **/
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
 */

 // (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__BLACK_LISTED_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';  // Included with Angular CLI.



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

(window as any)['global'] = window;

试试这个设置，让我知道。

也看看你的app.module.ts- 你是否以良好的方式进口了 Dragula？

@NgModule({
    declarations: [
        ...
    ],
    imports: [
        ...
        DragulaModule.forRoot(),
        ...
    ],
    exports: [
        ...
    ],
    providers: [
       ...    ],
    bootstrap: [AppComponent]
})

请注意，这应该是app.module.ts您的应用程序的主要模块，而不是任何子模块或延迟加载的模块。

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