问题
I am building an Angular 7 app, and when i add a package npm install dragula --save and import this into the pollyfills.ts file i get this error:
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) at webpack_require (bootstrap:83) at Object../node_modules/dragula/dragula.js (dragula.js:4) at webpack_require (bootstrap:83) at Module../src/polyfills.ts (polyfills.ts:1) at webpack_require (bootstrap:83) at Object.1 (polyfills.ts:92) at webpack_require (bootstrap:83)
When I googled it everyone says to add this (window as any).global = window; to pollyfills.ts I have done this and I still get the error. I also ready to delete the node_modules folder and npm i I have done this as well.
I do not know what else to do here. can anyone please tell me some sugestions or at least explain why this would happen?
This may not be relevant but I'm going to add it as well. There is another error which wasnt there before I imported them into 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) at Module../src/app/components/accordion/accordion.module.ts (accordion.component.ts:10) at webpack_require (bootstrap:83) at Module../src/app/shared/shared.module.ts (window.extensions.ts:15) at webpack_require (bootstrap:83) at Module../src/app/app.module.ts (app.constants.ts:17) at webpack_require (bootstrap:83) at Module../src/main.ts (main.ts:1) at webpack_require (bootstrap:83)
回答1:
I had a similar problem few weeks ago, and I solve it when I change few setts in polyfills.ts now It look like:
/**
* 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;
Try with this setts and let me know.
Look also in your app.module.ts - did you import Dragula in good way?
@NgModule({
declarations: [
...
],
imports: [
...
DragulaModule.forRoot(),
...
],
exports: [
...
],
providers: [
... ],
bootstrap: [AppComponent]
})
Please note that this should be a main app.module.ts for your app, not any child or lazy loaded module.
来源：https://stackoverflow.com/questions/54349858/angular-7-uncaught-referenceerror-global-is-not-defined-when-adding-package