What are the best practices for conditional rendering in Vue?

What are the best practices for conditional rendering in Vue?

In Vue, best practices for conditional rendering include using v-if for conditional blocks, v-else for fallback content, and v-show for toggling visibility without removing elements from the DOM.

When should I use v-show instead of v-if?

Use v-show when you need to toggle visibility frequently, as it keeps the element in the DOM and only changes its CSS display property, making it more performant for frequent toggles.

Can you give an example of using v-if and v-else?

Sure! Here's a simple example:

<div v-if="isLoggedIn">Welcome back!</div>
<div v-else>Please log in.</div>
``` This will show a welcome message if the user is logged in, otherwise it prompts them to log in.

Are there any performance considerations I should be aware of?

Yes, using v-if can be more performance-intensive than v-show because v-if adds or removes elements from the DOM, which can be costly if done frequently. Use v-if for infrequent conditions.