ngx-resize-observer v3.0.0

NgxResizeObserver

Angular 19.x library to monitor changes to elements. Uses ResizeObserver to do the work.

If you would like to simply know when elements are visible, check out ngx-visibility.

If you want to be notified when DOM elements change properties, ngx-mutation-observer would be a good pick.

Demonstration

There's a live demo over at CodeSandbox.io.

Installation

Install like other Angular libraries. First run a command to download the module.

npm install ngx-resize-observer

Next, add the module to your project.

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';

// Import the module
import { NgxResizeObserverModule } from 'ngx-resize-observer';

import { AppComponent } from './app.component';

@NgModule({
    declarations: [AppComponent, ItemComponent],

    // Include the module.
    imports: [BrowserModule, FormsModule, NgxResizeObserverModule],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule {}

Finally, you leverage the service directly or use some directives for common uses.

NgxResizeObserverDirective

Emits ResizeObserverEntry when a resize is detected for that element.

<div (onResize)="handleResize($event)"></div>

Only one property is configurable, which is the box model. When not specified, it defaults to "content-box". To change this, use the resizeBoxModel directive. The only allowed values are "content-box" and "border-box".

<div (onResize)="handleResize($event)" resizeBoxModel="border-box"></div>

License

This project is licensed under an MIT license.