I want to use a range slider in an angular project and I tried using one available module for angular 4.
It works fine during compilation but when I try to build it for deployment, it throws the below error.
I checked for the option of using jQuery plugin directly in the angular project and I'm only getting options for doing it in Angular 2.
Is there any way we can use jQuery plugins in Angular 4?
Please let me know.
Install jquery with npm
npm install jquery --save
Add typings
npm install --save-dev @types/jquery
Add scripts to angular-cli.json
"apps": [{
...
"scripts": [
"../node_modules/jquery/dist/jquery.min.js",
],
...
}]
Build project and serve
ng build
Cannot find name '$'
declare const $: any; above the @... decorator.
Yes you can use jquery with Angular 4
Steps:
1) In index.html put below line in tag.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
2) In component ts file below you have to declare var like this
import { Component } from '@angular/core';
declare var jquery:any;
declare var $ :any;
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'angular 4 with jquery';
toggleTitle(){
$('.title').slideToggle(); //
}
}
And use this code for corresponding html file like this:
<h1 class="title" style="display:none">
{{title}}
</h1>
<button (click)="toggleTitle()"> clickhere</button>
This will work for you. Thanks
Install jQuery using NPM Jquery NPM
npm install jquery
Install the jQuery declaration file
npm install -D @types/jquery
Import jQuery inside .ts
import * as $ from 'jquery';
call inside class
export class JqueryComponent implements OnInit {
constructor() {
}
ngOnInit() {
$(window).click(function () {
alert('ok');
});
}
}
You are not required to declare any jQuery variable as you installed @types/jquery.
declare var jquery:any; // not required
declare var $ :any; // not required
You should have access to jQuery everywhere.
The following should work:
jQuery('.title').slideToggle();
Cannot find name 'jQuery' if I'm not declaring them in the .ts file. So, if anyone faces this problem, he just needs to declare them.
You should not use jQuery in Angular. While it is possible (see other answers for this question), it is discouraged. Why?
Angular holds an own representation of the DOM in its memory and doesn't use query-selectors (functions like document.getElementById(id)) like jQuery. Instead all the DOM-manipulation is done by Renderer2 (and Angular-directives like *ngFor and *ngIf accessing that Renderer2 in the background/framework-code). If you manipulate DOM with jQuery yourself you will sooner or later...
If you really want to include jQuery (for duck-taping some prototype that you will 100% definitively throw away), I recommend to at least include it in your package.json with npm install --save jquery instead of getting it from google's CDN.
TLDR: For learning how to manipulate the DOM in the Angular way please go through the official tour-of heroes tutorial first: https://angular.io/tutorial/toh-pt2 If you need to access elements higher up in the DOM hierarchy (parent or
document body) or for some other reason directives like*ngIf,*ngFor, custom directives, pipes and other angular utilities like[style.background],[class.myOwnCustomClass]don't satisfy your needs, use Renderer2: https://www.concretepage.com/angular-2/angular-4-renderer2-example
constructor(private renderer: Renderer2, private el: ElementRef) {}), you can either filter for its children or manipulate the element directly by accessing it's nativeElement-Property: ngOnInit() { this.renderer.addClass(this.el.nativeElement, 'wild'); }. Here is a tutorial how to tell you more: alligator.io/angular/using-renderer2*ngIf, *ngFor, custom (made by you) directives, pipes and for CSS ngClass, [style.background] and [class.myCustomCssClass]. For further help: angular.io/tutorial/toh-pt2Try this:
import * as $ from 'jquery/dist/jquery.min.js';
Or add scripts to angular-cli.json:
"scripts": [
"../node_modules/jquery/dist/jquery.min.js",
]
and in your .ts file:
declare var $: any;
You can update your jquery typings version like so
npm install --save @types/jquery@latest
I had this same error and I've been at if for 5 days surfing the net for a solution.it worked for me and it should work for you
If you have the need to use other libraries in projects --typescript-- not just in projects - angle - you can look for tds's (TypeScript Declaration File) that are depares and that have information of methods, types, functions, etc. , which can be used by TypeScript, usually without the need for import. declare var is the last resource
npm install @types/lib-name --save-dev
You can use webpack to provide it. It will be then injected DOM automatically.
module.exports = {
context: process.cwd(),
entry: {
something: [
path.join(root, 'src/something.ts')
],
vendor: ['jquery']
},
devtool: 'source-map',
output: {
path: path.join(root, '/dist/js'),
sourceMapFilename: "[name].js.map",
filename: '[name].js'
},
module: {
rules: [
{test: /\.ts$/, exclude: /node_modules/, loader: 'ts-loader'}
]
},
resolve: {
extensions: ['.ts', '.es6', '.js', '.json']
},
plugins: [
new webpack.ProvidePlugin({
$: 'jquery',
jQuery: 'jquery'
}),
]
};
the solution to the typescript:
Step1:
npm install jquery
npm install --save-dev @types/jquery
step2: in Angular.json add:
"scripts": [
"node_modules/jquery/dist/jquery.min.js",
]
or in index.html add:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
step3: in *.component.ts where you want to use jquery
import * as $ from 'jquery'; // dont need "declare let $"
Then you can use jquery the same as javaScript. This way, VScode supports auto-suggestion by Typescript
Try using - declare let $ :any;
or import * as $ from 'jquery/dist/jquery.min.js'; provide exact path of the lib
ngOnInit() {
const $ = window["$"];
$('.flexslider').flexslider({
animation: 'slide',
start: function (slider) {
$('body').removeClass('loading')
}
})
}
