How to use jQuery with Angular?

Question

Can anyone tell me, how to use jQuery with Angular?

class MyComponent {
    constructor() {
        // how to query the DOM element from here?
    }
}

I'm aware there are workarounds like manipulating the class or id of the DOM element upfront, but I'm hoping for a cleaner way of doing it.

Answer 1

Using jQuery from Angular2 is a breeze compared to ng1. If you are using TypeScript you could first reference jQuery typescript definition.

tsd install jquery --save
or
typings install dt~jquery --global --save

TypescriptDefinitions are not required since you could just use any as the type for $ or jQuery

In your angular component you should reference a DOM element from the template using @ViewChild() After the view has been initialized you can use the nativeElement property of this object and pass to jQuery.

Declaring $ (or jQuery) as JQueryStatic will give you a typed reference to jQuery.

import {bootstrap}    from '@angular/platform-browser-dynamic';
import {Component, ViewChild, ElementRef, AfterViewInit} from '@angular/core';
declare var $:JQueryStatic;

@Component({
    selector: 'ng-chosen',
    template: `<select #selectElem>
        <option *ngFor="#item of items" [value]="item" [selected]="item === selectedValue">{{item}} option</option>
        </select>
        <h4> {{selectedValue}}</h4>`
})
export class NgChosenComponent implements AfterViewInit {
    @ViewChild('selectElem') el:ElementRef;
    items = ['First', 'Second', 'Third'];
    selectedValue = 'Second';

    ngAfterViewInit() {
        $(this.el.nativeElement)
            .chosen()
            .on('change', (e, args) => {
                this.selectedValue = args.selected;
            });
    }
}

bootstrap(NgChosenComponent);

This example is available on plunker: http://plnkr.co/edit/Nq9LnK?p=preview

tslint will complain about chosen not being a property on $, to fix this you can add a definition to the JQuery interface in your custom *.d.ts file

interface JQuery {
    chosen(options?:any):JQuery;
}    

Answer 2

This is what worked for me.

STEP 1 - First things first

// In the console
// First install jQuery
npm install --save jquery
// and jQuery Definition
npm install -D @types/jquery

STEP 2 - IMPORT

// Now, within any of the app files (ES2015 style)
import * as $ from 'jquery';
//
$('#elemId').width();

// OR

// CommonJS style - working with "require"
import $ = require('jquery')
//
$('#elemId').width();

#UPDATE - Feb - 2017

Lately, I'm writing code with ES6 instead of typescript and am able to import without * as $ in the import statement. This is what it looks like now:

import $ from 'jquery';
//
$('#elemId').width();

Good Luck.

Answer 3

Why is everyone making it a rocket science? For anyone else who needs to do some basic stuff on static elements, for example, body tag, just do this:

1. In index.html add script tag with the path to your jquery lib, doesn't matter where (this way you can also use IE conditional tags to load lower version of jquery for IE9 and less).
2. In your export component block have a function that calls your code: $("body").addClass("done"); Normaly this causes declaration error, so just after all imports in this .ts file, add declare var $:any; and you are good to go!