我得到错误
Error: Zone.js has detected that ZoneAwarePromise `(window|global).Promise` has been overwritten.
Most likely cause is that a Promise polyfill has been loaded after Zone.js (Polyfilling Promise api is not necessary when zone.js is loaded. If you must load one, do so before loading zone.js.)
at Function.push../node_modules/zone.js/dist/zone.js.Zone.assertZonePatched (zone.js:58)
at new NgZone (core.js:24212)
at getNgZone (core.js:24925)
at PlatformRef.push../node_modules/@angular/core/fesm5/core.js.PlatformRef.bootstrapModuleFactory (core.js:24823)
at core.js:24867
at exceljs.min.js:3
at MutationObserver.n (exceljs.min.js:3)
at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke (zone.js:391)
at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runGuarded (zone.js:161)
at MutationObserver.<anonymous> (zone.js:144)
我从发生此错误的地方发布了zone.js的一小部分
function Zone(parent, zoneSpec) {
this._parent = parent;
this._name = zoneSpec ? zoneSpec.name || 'unnamed' : '<root>';
this._properties = zoneSpec && zoneSpec.properties || {};
this._zoneDelegate =
new ZoneDelegate(this, this._parent && this._parent._zoneDelegate, zoneSpec);
}
Zone.assertZonePatched = function () {
if (global['Promise'] !== patches['ZoneAwarePromise']) {
throw new Error('Zone.js has detected that ZoneAwarePromise `(window|global).Promise` ' +
'has been overwritten.\n' +
'Most likely cause is that a Promise polyfill has been loaded ' +
'after Zone.js (Polyfilling Promise api is not necessary when zone.js is loaded. ' +
'If you must load one, do so before loading zone.js.)');
}
};
抛出以上错误。我确实在努力解决这个问题。
收到此错误时
我在我的项目中有一项任务是导出具有样式的Excel工作表。我找到了一个名为exceljs的包装。包括此之后,我开始收到此错误。
来自exceljs.js自述文件的一些相关文档
## ES5 Imports
要使用ES5转换代码,请使用dist / es5路径。
const ExcelJS = require('exceljs/dist/es5');
注意: ES5构建对许多不再使用的polyfill具有隐式依赖性由exceljs明确添加。您将需要在依赖项中添加“ core-js”和“ regenerator-runtime”,在exceljs导入之前,在您的代码中包含以下要求:
// polyfills required by exceljs
require('core-js/modules/es.promise');
require('core-js/modules/es.object.assign');
require('core-js/modules/es.object.keys');
require('regenerator-runtime/runtime');
// ...
const ExcelJS = require('exceljs/dist/es5');
Browserify
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-polyfill/6.26.0/polyfill.js"></script>
<script src="exceljs.js"></script>
我正在使用es6。所以我想念的是。请帮助我。
Angular版本的详细信息。
Angular CLI: 7.3.9
Node: 10.0.0
OS: linux x64
Angular: 8.0.0
... core
Package Version
-------------------------------------------------------------
@angular-devkit/architect 0.13.9
@angular-devkit/build-angular 0.13.9
@angular-devkit/build-optimizer 0.13.9
@angular-devkit/build-webpack 0.13.9
@angular-devkit/core 7.3.9
@angular-devkit/schematics 7.3.9
@angular/animations 7.2.15
@angular/cdk 8.1.4
@angular/cli 7.3.9
@angular/common 7.2.15
@angular/compiler 7.2.15
@angular/compiler-cli 7.2.15
@angular/forms 7.2.15
@angular/http 7.2.15
@angular/language-service 7.2.15
@angular/material 8.1.4
@angular/platform-browser 7.2.15
@angular/platform-browser-dynamic 7.2.15
@angular/router 7.2.15
@ngtools/webpack 7.3.9
@schematics/angular 7.3.9
@schematics/update 0.13.9
rxjs 6.3.3
typescript 3.2.4
webpack
您能够解决此问题,在我的项目中包含另一个软件包后,我遇到了完全相同的问题。如果是,请说明问题出在什么地方?