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How do you handle SSR hydration mismatch errors using ngSkipHydration?

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01

Understand the problem

Explain causes of hydration mismatches and how to use the ngSkipHydration attribute.

ssrhydrationtroubleshooting
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03

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Hydration mismatches occur when the DOM generated on the server differs from the DOM rendered on the client (e.g. using new Date() or browser-only APIs). Adding ngSkipHydration to a component's host element skips hydration for that subtree, falling back to destructive rendering.

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04

Read the code

Using ngSkipHydration to bypass client reconciliation
import { Component, OnInit, PLATFORM_ID, inject } from '@angular/core';
import { isPlatformBrowser } from '@angular/common';

@Component({
  selector: 'app-clock',
  standalone: true,
  template: '<div ngSkipHydration><p>Client Time: {{ currentTime }}</p></div>'
})
export class ClockComponent implements OnInit {
  currentTime = '';
  private platformId = inject(PLATFORM_ID);

  ngOnInit() {
    if (isPlatformBrowser(this.platformId)) {
      this.currentTime = new Date().toLocaleTimeString();
    }
  }
}
05

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