Having trouble integrating jQuery into an Angular CLI project

I'm trying to incorporate jQuery into my angular project created with angular cli. I followed the instructions provided on this website:

  1. To begin, I installed jQuery by running:

    npm install --save jquery;
    
  2. Next, I added type definitions for jQuery to ensure type checking:

    npm install --save-dev @types/jquery
    
  3. Then, I included a reference to the jQuery file in the "scripts" array within angular-cli.json:

    "scripts": [
       "../node_modules/jquery/dist/jquery.min.js"
    ]
    
  4. In my app.component.ts file, I imported jQuery as follows:

    import { Component } from '@angular/core';
    import * as jQuery from 'jquery';
    
    @Component({
      selector: 'app-root',
      templateUrl: './app.component.html',
      styleUrls: ['./app.component.scss']
    })
    export class AppComponent {
      title = 'app';
      test = jQuery("body");
    }
    

However, when I run ng build, I encountered this error:

ERROR in ./src/app/app.component.ts (2,25): Module ''jquery'' resolves
to a non-module entity and cannot be imported using this construct.

If I remove the line

import * as jQuery from 'jquery';
and rebuild using `ng build', I get the following error:

ERROR in ./src/app/app.component.ts (10,10): Cannot find name 'jQuery'.

I'm unsure of how to proceed from here.

Update 1

Following the suggestions made by @Saravana, When I simply add declare const $: JQueryStatic and rebuild using `ng build`, I receive this error:

ERROR in ./src/app/app.component.ts (2,19): Cannot find name 'JQueryStatic'.

However, if I implement what Saravana proposed in his initial post before deleting it:

import "jquery"; 
declare const $: JQueryStatic;

The build process completes successfully without any issues. Therefore, I believe Saravana should revert back to his original suggestion.

Answer №1

By incorporating the jQuery library, it automatically incorporates global variables like $ and jQuery, allowing you to simply declare the variable:

import "jquery"; 
declare const $: JQueryStatic;

Answer №2

After updating to the most recent cli version, starting a fresh project, and transferring my components over, I found that following the provided steps worked without any issues.

npm remove -g angular-cli

npm cache clear

npm install -g @angular/cli@latest

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