Angular 2 typescript调用javascript函数

本文介绍了Angular 2 typescript调用javascript函数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

是否有正确的方法从Angular 2（TypeScript）中的组件调用JavaScript函数？

Is there a correct way to invoke a JavaScript function from a component in Angular 2 (TypeScript) ?

这是我的组件：

import { ElementRef, AfterViewInit } from '@angular/core'; export class AppComponent implements AfterViewInit { constructor(private _elementRef: ElementRef) { } ngAfterViewInit() { /** * Works but i have this error : * src/appponent.ts(68,9): error TS2304: Cannot find name 'MYTHEME'. * src/appponent.ts(69,9): error TS2304: Cannot find name 'MYTHEME'. */ MYTHEME.documentOnLoad.init(); MYTHEME.documentOnReady.init(); /** * Works without error, but doesn't seem like a right way to do it */ var s = document.createElement("script"); s.text = "MYTHEME.documentOnLoad.init(); MYTHEME.documentOnReady.init();"; this._elementRef.nativeElement.appendChild(s); } }

直接调用JavaScript函数会导致编译错误，但已编译的JavaScript文件（appponent.js）中的语法是正确的：

Calling the JavaScript function directly result in an compilation error, but the syntax in the "compiled" JavaScript file (appponent.js) is correct :

AppComponent.prototype.ngAfterViewInit = function () { MYTHEME.documentOnLoad.init(); MYTHEME.documentOnReady.init(); };

第二种方式（appendChild）可以正常工作，但我不认为（改变DOM来自typescript / angular）是正确的方法。

The 2nd way (appendChild) works without error, but i don't think (altering the DOM from typescript/angular) is the correct way to do it.

我发现了这个：使用Typescript中的Javascript函数我尝试声明界面：

I found this : Using a Javascript Function from Typescript I tried declaring the interface :

interface MYTHEME { documentOnLoad: Function; documentOnReady: Function; }

但TypeScript似乎无法识别它（界面没有错误）声明）。

But the TypeScript doesn't seem to recognize it (no error in the interface declaration).

谢谢

编辑：

在Juan Mendes的回答之后，这就是我的结果：

Following the answer by Juan Mendes this is what i ended with :

import { AfterViewInit } from '@angular/core'; interface MYTHEME { documentOnLoad: INIT; documentOnReady: INIT; } interface INIT { init: Function; } declare var MYTHEME: MYTHEME; export class AppComponent implements AfterViewInit { constructor() { } ngAfterViewInit() { MYTHEME.documentOnLoad.init(); MYTHEME.documentOnReady.init(); } }

推荐答案

你必须使用声明告诉TypeScript外部（JavaScript）声明。请参见 www.typescriptlang/docs/handbook/writing- declaration-files.html

You have to tell TypeScript about external (JavaScript) declarations using declare. See www.typescriptlang/docs/handbook/writing-declaration-files.html

interface MyTheme { documentOnLoad: Function; documentOnReady: Function; } declare var MYTHEME: MyTheme;

或匿名

declare var MYTHEME: {documentOnLoad: Function, documentOnReady: Function};