在Angular 2中使用外部JavaScript文件

Question

外部JavaScript文件在angular 2组件内部无效。它显示错误myEObject is not defined。

external.component.html

<p id="demo">A Paragraph.</p>
<button type="button" (click)="callFun()">Try it</button>

external.component.ts

import { Component } from '@angular/core';
import '../myExternal.js';

declare var myEObject: any;

@Component({
    selector: 'external-file',
    templateUrl: './external.component.htmll'
})
export class ExternalComponent {

    callFun(){
        myEObject.myFunction();
    }
}

myExternal.js

var myEObject = (function() {

    return {
        func1: function() {
            document.getElementById("demo").innerHTML = "Paragraph changed.";
        }
    } 

})(myEObject||{})

Answer 1

1. 通过终端---

   执行此命令

   npm install jquery --save,
   
   npm install --save-dev @types/jquery
   

2. 将myExternal.js文件移至资源文件夹