从命令行:
ng new sandbox
cd .\sandbox\
ng serve
打开http://localhost:4200/。可以。
npm install --save amazon-cognito-identity-js
在\src\app\sign-up\sign-up.component.ts
内添加以下代码行:
import * as AmazonCognitoIdentity from 'amazon-cognito-identity-js';
添加一个构造函数:
constructor() {
new AmazonCognitoIdentity.CognitoUserPool({});
}
页面为空白。控制台错误:
Uncaught ReferenceError: global is not defined
at Object../node_modules/buffer/index.js (index.js:43)
at __webpack_require__ (bootstrap:76)
at Object../node_modules/amazon-cognito-identity-js/es/AuthenticationHelper.js (AuthenticationHelper.js:1)
at __webpack_require__ (bootstrap:76)
at Object../node_modules/amazon-cognito-identity-js/es/index.js (index.js:1)
at __webpack_require__ (bootstrap:76)
at Object../src/app/app.component.ts (main.js:94)
at __webpack_require__ (bootstrap:76)
at Object../src/app/app.module.ts (app.component.ts:9)
at __webpack_require__ (bootstrap:76)
解决此错误的最佳方法是什么?
答案 0 :(得分:1)
将其放在/src/polyfills.ts
的最后一行
(window as any).global = window