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@ng-web-apis/resize-observer

v4.11.1

Published

A library for declarative use of Resize Observer API with Angular

Downloads

65,439

Readme

ng-web-apis logo Resize Observer API for Angular

npm version npm bundle size codecov

This is a library for declarative use of Resize Observer API with Angular.

Install

If you do not have @ng-web-apis/common:

npm i @ng-web-apis/common

Now install the package:

npm i @ng-web-apis/resize-observer

Usage

  1. Import ResizeObserverModule to the module where you plan to use it.
  2. Use waResizeObserver directive to observe an element:
<section>
  <h1
    waResizeBox="content-box"
    (waResizeObserver)="onResize($event)"
  >
    I'm being observed
  </h1>
</section>

Use waResizeBox to configure ResizeObserver options

NOTE: Keep in mind these are used one time in constructor so you cannot use binding, only strings.

Service

Alternatively you can use Observable-based ResizeObserverService and provide token RESIZE_OPTION_BOX manually:

@Component({
  selector: 'my-component',
  providers: [
    ResizeObserverService,
    {
      provide: RESIZE_OPTION_BOX,
      useValue: 'border-box',
    },
  ],
})
export class Example {
  constructor(@Inject(ResizeObserverService) entries$: ResizeObserverService) {
    entries$.subscribe((entries) => {
      // This will trigger when the component resizes
      // Don't forget to unsubscribe
      console.log(entries);
    });
  }
}

Browser support

| | | | | | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | 79+ | 69+ | 64+ | 13.1+ | 13.4+ |

You can use polyfill to support older browsers

Demo

You can try online demo here

See also

Other Web APIs for Angular by @ng-web-apis