Explanation on How to utilize the $( document ).ready() jQuery function within the ngAfterViewInit() on a Component class using Angular 2

This is the code snippet:

constructor(private el: ElementRef) { }

ngAfterViewInit() {

    this.loadScript('app/homepage/template-scripts.js');       


}

Answer №1

Angular provides a way to avoid relying on jQuery by using lifecycle events:

(organized by lifecycle)

-ngOnChanges -ngOnInit -ngDoCheck -ngAfterContentInit -ngAfterContentChecked -ngAfterViewInit -ngAfterViewChecked -ngOnDestroy

If you need to use the jQuery function .ready, you can import jQuery as a dependency in your Angular project, then import the relevant module in your .ts file and call it within ngAfterViewInit:

// Before all else
// Start by installing jQuery
npm install --save jquery
// Next, add jQuery Definition
npm install -D @types/jquery

-----

import $ from 'jquery';
//

ngAfterViewInit() {
// other actions

if ($.ready()) {
    console.log('ready');
  }
}

The code above does work.

However, it is worth noting that this approach is not recommended as it mixes logic within existing Angular lifecycle methods.

https://angular.io/guide/lifecycle-hooks

I hope this explanation has been helpful.

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