SSR & Hydration — Angular Technical Interview Questions & Answers

SSR & Hydration

SSR & Hydration

  • SSR & Hydration (and) is a Angular topic. In plain words you use it for first paint of /marks in a public site. Don’t start with a slogan — start with that picture.
  • Smallest example: isPlatformBrowser + afterNextRender. Type it, run it, and say what you see. If you can do that from memory, you know SSR & Hydration (and).
  • From the example next to this theory: SSR & Hydration: toggle open.
  • Trap: using window in the constructor. Fix that before you talk about advanced Angular.
  • Viva: what is SSR & Hydration (and)? Then show isPlatformBrowser + afterNextRender. Then name the trap.

Technical Interview Tip: What is SSR & Hydration (and)? Show this: isPlatformBrowser + afterNextRender. Trap: using window in the constructor.

Code Examples for SSR & Hydration

SSR & Hydration — working example

import { Component } from "@angular/core";

@Component({
  selector: "app-root",
  template: `
    <h1>{{ title }}</h1>
    <button (click)="toggle()">Toggle</button>
    <p *ngIf="open">Panel open</p>
  `,
})
export class AppComponent {
  title = "Angular practice";
  open = true;
  toggle() {
    this.open = !this.open;
  }
}

SSR & Hydration: toggle open. Say whether the panel is on screen after one click.

How to Explain SSR & Hydration to an Interviewer

What is SSR & Hydration (and)?

Used for first paint of /marks a public site Not just the heading

Give one small example of SSR & Hydration (and).

isPlatformBrowser + afterNextRender SSR & Hydration: toggle open

What mistake do beginners make with SSR & Hydration (and)?

using window in the constructor Show the fix

Where do you use SSR & Hydration (and)?

a public site first paint of /marks