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What is the difference between afterRender and afterNextRender lifecycle hooks?

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01

Understand the problem

Contrast rendering lifecycle hooks in modern Angular.

lifecyclerendering
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03

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afterRender triggers a callback on every subsequent DOM write/read cycle. afterNextRender triggers a callback only during the next DOM write/read cycle. Both are safe for browser-only operations because they never run during server-side rendering (SSR).

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04

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Using afterNextRender for third-party library initialization
import { Component, ElementRef, ViewChild, afterNextRender } from '@angular/core';

@Component({
  selector: 'app-chart-wrapper',
  standalone: true,
  template: '<div #chartHost></div>'
})
export class ChartWrapperComponent {
  @ViewChild('chartHost') host!: ElementRef;

  constructor() {
    afterNextRender(() => {
      this.initThirdPartyLibrary(this.host.nativeElement);
    });
  }

  initThirdPartyLibrary(el: HTMLElement) {
    el.innerText = 'Dynamic Canvas Rendered here';
  }
}
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