Dynamic render patterns in Vue - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a dynamic render pattern in Vue?

A dynamic render pattern in Vue means showing or hiding parts of the page based on data or user actions, so the page changes without reloading.

beginner

How does the v-if directive work in Vue?

v-if shows or hides an element depending on a condition. If the condition is true, the element appears; if false, it disappears from the page.

intermediate

What is the difference between v-if and v-show?

v-if adds or removes elements from the page, while v-show only hides or shows them using CSS. v-show is faster to toggle but v-if saves resources when elements are rarely shown.

intermediate

How can you render different components dynamically in Vue?

Use the <component :is="componentName" /> tag, where componentName is a variable holding the component to show. This lets Vue switch components on the fly.

beginner

Why is key important when rendering lists dynamically in Vue?

The key helps Vue track each item uniquely. It improves performance and avoids bugs by telling Vue which items changed, moved, or stayed the same.

Which Vue directive removes an element from the DOM when a condition is false?

A v-if

B v-show

C v-for

D v-bind

v-if adds or removes elements from the DOM based on the condition.

What does the v-show directive do when its condition is false?

A Throws an error

B Removes the element from the DOM

C Hides the element using CSS

D Re-renders the entire component

v-show hides the element by setting CSS display: none.

How do you dynamically switch components in Vue?

A Using <code>v-bind</code> on a div

B Using <code>v-if</code> only

C Using <code>v-for</code>

D Using <code>&lt;component :is="componentName" /&gt;</code>

The <component :is="componentName" /> tag lets Vue render different components dynamically.

Why should you use a key when rendering lists?

A To style the list items

B To help Vue track items for better updates

C To add event listeners

D To sort the list automatically

The key helps Vue identify each item uniquely for efficient updates.

Which directive is best when you want to toggle visibility very often without removing elements?

A v-show

B v-if

C v-for

D v-on

v-show toggles visibility with CSS, making it faster for frequent changes.

Explain how Vue's v-if and v-show differ and when to use each.

Think about performance and how often you change visibility.

Describe how to render different components dynamically in Vue and why this is useful.

Imagine changing tabs or pages inside one area.