how to use jquery inside angular4

Question

i am new to angular, i am trying to use Jquery with angular 4, i found this question on stack over flow and in side the question i found this example

but when i try to impliment it i get the following error :

vendor.bundle.js:51867 ERROR Error: Uncaught (in promise): TypeError: $(...).chosen is not a function
TypeError: $(...).chosen is not a function
    at PocTestsPage.webpackJsonp.../../../../../src/app/structure/poc-tests/poc-tests.page.ts.PocTestsPage.ngAfterViewInit (main.bundle.js:898)
    at callProviderLifecycles (vendor.bundle.js:61944)
    at callElementProvidersLifecycles (vendor.bundle.js:61919)
    at callLifecycleHooksChildrenFirst (vendor.bundle.js:61903)
    at checkAndUpdateView (vendor.bundle.js:62935)
    at callWithDebugContext (vendor.bundle.js:63989)
    at Object.debugCheckAndUpdateView [as checkAndUpdateView] (vendor.bundle.js:63529)
    at ViewRef_.webpackJsonp.../../../core/@angular/core.es5.js.ViewRef_.detectChanges (vendor.bundle.js:61001)
    at RouterOutlet.webpackJsonp.../../../router/@angular/router.es5.js.RouterOutlet.activateWith (vendor.bundle.js:83416)
    at ActivateRoutes.webpackJsonp.../../../router/@angular/router.es5.js.ActivateRoutes.placeComponentIntoOutlet (vendor.bundle.js:82597)
    at PocTestsPage.webpackJsonp.../../../../../src/app/structure/poc-tests/poc-tests.page.ts.PocTestsPage.ngAfterViewInit (main.bundle.js:898)
    at callProviderLifecycles (vendor.bundle.js:61944)
    at callElementProvidersLifecycles (vendor.bundle.js:61919)
    at callLifecycleHooksChildrenFirst (vendor.bundle.js:61903)
    at checkAndUpdateView (vendor.bundle.js:62935)
    at callWithDebugContext (vendor.bundle.js:63989)
    at Object.debugCheckAndUpdateView [as checkAndUpdateView] (vendor.bundle.js:63529)
    at ViewRef_.webpackJsonp.../../../core/@angular/core.es5.js.ViewRef_.detectChanges (vendor.bundle.js:61001)
    at RouterOutlet.webpackJsonp.../../../router/@angular/router.es5.js.RouterOutlet.activateWith (vendor.bundle.js:83416)
    at ActivateRoutes.webpackJsonp.../../../router/@angular/router.es5.js.ActivateRoutes.placeComponentIntoOutlet (vendor.bundle.js:82597)
    at resolvePromise (polyfills.bundle.js:3179)
    at resolvePromise (polyfills.bundle.js:3150)
    at polyfills.bundle.js:3227
    at ZoneDelegate.webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.invokeTask (polyfills.bundle.js:2833)
    at Object.onInvokeTask (vendor.bundle.js:54923)
    at ZoneDelegate.webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.invokeTask (polyfills.bundle.js:2832)
    at Zone.webpackJsonp.../../../../zone.js/dist/zone.js.Zone.runTask (polyfills.bundle.js:2600)
    at drainMicroTaskQueue (polyfills.bundle.js:2993)
    at ZoneTask.invoke (polyfills.bundle.js:2899)
    at timer (polyfills.bundle.js:3949)

i am using an angular 4 library called cleanUI:

i created a component called poc-tests as shown in the image :

poc-tests.html:

<!DOCTYPE html>
<html>
<head>
  <title>Angular 2 QuickStart</title>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/chosen/1.5.1/chosen.min.css">

  <!-- 1. Load libraries -->
  <!-- Polyfill(s) for older browsers -->
  <script src="https://npmcdn.com/core-js/client/shim.min.js"></script>

  <script src="https://npmcdn.com/[email protected]?main=browser"></script>
  <script src="https://npmcdn.com/[email protected]"></script>
  <script src="https://npmcdn.com/[email protected]/dist/system.src.js"></script>

  <!-- jQuery and chosen -->
  <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/chosen/1.5.1/chosen.jquery.min.js"></script>


  <!-- 2. Configure SystemJS -->
  <script src="systemjs.config.js"></script>
  <script>
    System.import('app').catch(function(err){ console.error(err); });
  </script>
</head>

<!-- 3. Display the application -->
<body>
<ng-chosen>Loading...</ng-chosen>
</body>
</html>

poc-tests.page.ts:

import {AfterViewInit, Component, ElementRef, OnInit, ViewChild} from '@angular/core';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/debounceTime';
import 'rxjs/add/operator/distinctUntilChanged';

declare var $: any;
declare var jQuery: any;
declare var autosize: any;
declare var Ladda: any;
declare var Chartist: any;

@Component({
  selector: 'ng-chosen',
  template: `<select #selectElem>
    <option *ngFor="let item of items" [value]="item" [selected]="item === selectedValue">{{item}} option</option>
  </select>
  <h4> {{selectedValue}}</h4>`
})
export class PocTestsPage 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;
      });
  }
}

Is chosen installed? Are you sure the issue is with jQuery, and not that chosen isn't loaded? — random_user_name
– random_user_name, Commented Jun 17, 2017 at 21:19
Your error specifically states that ` $(...).chosen` is not a function. chosen is a jQuery library. It's being used somehow, the question is, are you loading it? — random_user_name
– random_user_name, Commented Jun 17, 2017 at 22:08

Michael Kang · Accepted Answer · 2017-06-17 21:32:51Z

2

You need to install @types/jquery and remove all the declare var related to jQuery:

npm install @types/jquery --save

If you are also using webpack to build static files, you'll need this plugin:

new webpack.ProvidePlugin({
  $: "jquery",
  jQuery: "jquery"
}),

answered Jun 17, 2017 at 21:32

Michael Kang

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