Hydration behavior in Vue - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is hydration in Vue?

Hydration is when Vue takes the static HTML from the server and makes it interactive by attaching event listeners and state on the client side.

beginner

Why is hydration important in server-side rendering (SSR)?

Hydration lets the app load fast with pre-rendered HTML and then become fully interactive without reloading the page.

intermediate

What happens if the server HTML and client Vue app do not match during hydration?

Vue will warn about a mismatch and may replace the server HTML, causing a flicker or losing some content.

intermediate

How can you avoid hydration mismatches in Vue?

Make sure the server and client render the same content and avoid using random or time-based values during rendering.

beginner

What is the difference between hydration and client-side rendering in Vue?

Hydration starts with server HTML and adds interactivity, while client-side rendering builds the HTML entirely in the browser.

What does Vue do during hydration?

A Attaches event listeners to existing server-rendered HTML

B Replaces all server HTML with new HTML

C Only loads CSS styles

D Disables interactivity

Hydration attaches event listeners and state to the server-rendered HTML to make it interactive.

When can hydration mismatches happen?

A When JavaScript is disabled

B When CSS is missing

C When server and client render different content

D When the browser is offline

Mismatches occur if the server and client render different HTML, causing Vue to warn and fix the difference.

Which Vue feature relies on hydration?

A Vue CLI

B Server-Side Rendering (SSR)

C Vuex Store

D Vue Router

SSR uses hydration to make server-rendered HTML interactive on the client.

What is a good practice to prevent hydration issues?

A Disable JavaScript on client

B Use inline styles only

C Render only on client

D Avoid using random values during rendering

Avoiding random or time-based values ensures server and client render the same HTML.

What is the main benefit of hydration?

A Fast initial load with interactive UI

B No need for CSS

C Offline support

D Automatic database syncing

Hydration allows fast loading with server HTML and then adds interactivity for a smooth user experience.

Explain in your own words what hydration means in Vue and why it matters.

Think about how Vue makes static HTML interactive after loading.

Describe common causes of hydration mismatches and how to avoid them.

Focus on what can make server and client HTML different.