如何将jQuery导入Angular2 TypeScript项目？
[英]How to import jQuery to Angular2 TypeScript projects?
问题描述
I want to wrap some jQuery code in an Angular2 directive. 
我想在Angular2指令中包含一些jQuery代码。
I installed jQuery library for Typings into my project with the following command: 我使用以下命令将Typings的jQuery库安装到我的项目中：
typings install dt~jquery --save --global
So now i have jquery folder under typings/global folder in my project directory. 所以现在我的项目目录中的typings/global文件夹下有jquery文件夹。 In addition the following new line has been added to my typings.json file: 此外，我的typings.json文件中添加了以下新行：
{
"globalDependencies": {
"core-js": "registry:dt/core-js#0.0.0+20160602141332",
"jasmine": "registry:dt/jasmine#2.2.0+20160621224255",
"node": "registry:dt/node#6.0.0+20160807145350",
"jquery": "registry:dt/jquery#1.10.0+20160908203239"
}
}
I started to write a new Angular2 directive (that I imported into app-module file) but I do not know how to correctly import jQuery library. 我开始编写一个新的Angular2指令（我导入到app-module文件中），但我不知道如何正确导入jQuery库。 Here is my source file: 这是我的源文件：
import {Directive} from '@angular/core';
@Directive({
selector: "my-first-directive"
})
export class MyFirstDirective {
constructor() {
$(document).ready(function () {
alert("Hello World");
});
}
}
But I can't use nor $ nor jQuery . 但我不能使用也不是$ jQuery 。 What is the next step? 你下一步怎么做？
7 个解决方案
解决方案1
24 2017-04-12 18:18:39
Step 1: get jquery in your project 第1步：在项目中获取jquery
npm install jquery
Step 2: add type for jquery 第2步：为jquery添加类型
npm install -D @types/jquery
Step 3: Use it in your component! 第3步：在组件中使用它！
import * as $ from 'jquery';
Ready to use $! 准备使用$！
解决方案2
4 2017-09-07 11:06:58
If you are using "@angular/cli" then install: 如果您使用“@ angular / cli”，请安装：
npm install jquery --save
Second step install: 第二步安装：
install: npm install @types/jquery --save-dev
And find your file name in "angular-cli.json" on the root and add the inside of as like: 并在根目录下的“angular-cli.json”中找到您的文件名，并添加如下内容：
script:["../node_modules/jquery/dist/jquery.min.js"]
Now it will work. 现在它会起作用。
解决方案3
3 2017-02-04 19:10:29
jQuery.service.ts jQuery.service.ts
import { OpaqueToken } from '@angular/core'
export let JQ_TOKEN = new OpaqueToken('jQuery');
index.ts` index.ts`
export * from './jQuery.service';
app.module.ts app.module.ts
declare let jQuery : Object;
@NgModule({
providers: [
{ provide: TOASTR_TOKEN, useValue: toastr },
{ provide: JQ_TOKEN, useValue: jQuery },
})
export class AppModule { }
how to use Jquery in component 如何在组件中使用Jquery
import { Component, Input, ViewChild, ElementRef, Inject } from '@angular/core'
import { JQ_TOKEN } from './jQuery.service'
@Component({
selector: 'simple-modal',
template: `
<div id="{{elementId}}" #modalcontainer class="modal fade" tabindex="-1">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal"><span>×</span></button>
<h4 class="modal-title">{{title}}</h4>
</div>
<div class="modal-body" (click)="closeModal()">
<ng-content></ng-content>
</div>
</div>
</div>
</div>
`,
styles: [`
.modal-body { height: 250px; overflow-y: scroll; }
`]
})
export class SimpleModalComponent {
@Input() title: string;
@Input() elementId: string;
@Input() closeOnBodyClick: string;
@ViewChild('modalcontainer') containerEl: ElementRef;
constructor(@Inject(JQ_TOKEN) private $: any) {}
closeModal() {
if(this.closeOnBodyClick.toLocaleLowerCase() === "true") {
this.$(this.containerEl.nativeElement).modal('hide');
}
}
}
解决方案4
1 2016-09-15 13:13:16
You should have a typings.json that points to your jquery typing file. 你应该有一个typings.json指向你的jquery输入文件。 Then: 然后：
systemjs.config (notice map setting for jquery) systemjs.config（jquery的通知映射设置）
System.config({
defaultJSExtensions: true,
paths: {
// paths serve as alias
'npm:': 'node_modules/'
},
map: {
'app': 'app',
jquery: 'http://ajax.googleapis.com/ajax/libs/jquery/2.2.2/jquery.min.js',
material: 'npm:material-design-lite/dist/material.min.js',
// angular bundles
'@angular/core': 'npm:@angular/core/bundles/core.umd.js',
....
},
packages: {
app: { main: 'main', format: 'register', defaultExtension: 'js' },
'rxjs': { defaultExtension: 'js' }
},
});
In component: 在组件中：
import $ from 'jquery';
Then use $ as usual. 然后像往常一样使用$。
解决方案5
1 2016-09-15 13:29:15
You could also load your jQuery Javascript file in a normal script tag in the head section of your index.html. 您还可以将您的jQuery Javascript文件加载到index.html的head部分中的普通script标记中。
<html>
<head>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.min.js" />
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.1.8/semantic.min.js" />
...
</head>
...
Then in the component or directive where you need it, just declare the $ variable needed for jQuery, since you won't have the typings for all the plugins you need: 然后在您需要它的组件或指令中，只需声明jQuery所需的$ variable，因为您不需要所有所需插件的输入：
import {Directive} from '@angular/core';
declare var $: any;
@Directive({
selector: "my-first-directive"
})
export class MyFirstDirective {
constructor() {
$(document).ready(function () {
alert("Hello World");
});
}
}
解决方案6
0 2016-09-15 18:29:13
I don't think it should be a issue to use jquery with angular 2. If the typings and the dependencies for jquery are installed properly, then it should not be a issue to use jquery in angular 2. 我不认为使用带有角度2的jquery应该是一个问题。如果正确安装了jquery的类型和依赖关系，那么在角度2中使用jquery应该不是问题。
I was able to use jquery in my angular 2 project with proper installation. 我能够在我的角度2项目中使用jquery并正确安装。 And by proper installation, I mean the installation of jquery typings in order to recognize it in typescript. 通过正确的安装，我的意思是安装jquery类型，以便在打字稿中识别它。
After that, I was able to use jquery in following way: 之后，我能够以下列方式使用jquery：
jQuery(document).ready({
()=>{
alert("Hello!");
};
});
解决方案7
0 2017-08-10 08:37:09
This is old question and there're some answers already. 这是一个古老的问题，已经有了一些答案。 However existing answers are overly complicated ( answer from user1089766 contains many unnecessary stuffs). 但是现有的答案过于复杂（来自user1089766的回答包含许多不必要的东西）。 Hope this helps someone new. 希望这有助于新人。
Add <script src="http://code.jquery.com/jquery-3.2.1.min.js"></script> Into your index.html file. 将<script src="http://code.jquery.com/jquery-3.2.1.min.js"></script>到index.html文件中。
Create jQuery.Service.ts: 创建jQuery.Service.ts：
import {InjectionToken} from "@angular/core";
export let jQueryToken = new InjectionToken('jQuery');
In you module file, add this jQueryToken to provider: 在您的模块文件中，将此jQueryToken添加到提供程序：
providers:[
{
provide: jQueryToken,
useValue: jQuery
}]
Now @Inject(jQueryToken) and it is ready to use. 现在@Inject(jQueryToken) ，它已准备好使用。 Let say you want to use inside a component name ExperimentComponent then: 假设您想在组件名称ExperimentComponent中使用，然后：
import {Component, Inject, OnInit} from '@angular/core';
import {jQueryToken} from "./common/jquery.service";
@Component({
selector: 'app-experiment',
templateUrl: './experiment.component.html',
styleUrls: ['./experiment.component.css']
})
export class ExperimentComponent implements OnInit {
constructor(@Inject(jQueryToken) private $: any) {
$(document).ready(function () {
alert(' jQuery is working');
});
}
ngOnInit() {
}
}
Whenever you open ExperimentComponent the alert function will call and pop up the message. 每当您打开ExperimentComponent时，警报功能都会调用并弹出消息。
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