⚠️ This lesson is retired and might contain outdated information.

Conditionally Render DOM Elements in Vue.js

Greg Thoman
InstructorGreg Thoman
Share this video with your friends

Social Share Links

Send Tweet
Published 8 years ago
Updated 8 months ago

You can use v-if and v-else to display content based on assertions on your data. Similarly, v-show can be used to render the content, but hide it with css. v-if can also be used on an invisible wrapper <template> element.

[00:00] Here's a list of Dinosaurs. Let's prevent the heading from rendering, if there's no list. We'll add v-if, and set that to the comparison, ="dinos.length > 0Now, our heading will be hidden if there are no Dinosaurs. That leaves the markup for the list. Let's create a new element called "template," and move our v-if statement onto it.

[00:20] The element template won't be rendered in the view, but everything inside it will now be conditionally rendered. If there isn't a list, we want to show a message.

[00:29] Let's create a paragraph tag with v-else, and give it some text. A v-else element will be rendered, if the previous v-if wasn't.

[00:38] Now, we want to conditionally show the addition and subtraction button, based on the quantity of that species. For the addition button, let's add v-show, and set it equal to "dino.quantity < 5".

[00:50] For the subtraction, we'll set v-show= "dino.quantity > 1". v-show allows the element to be rendered in the view, and to be shown, or hidden with CSS.

marushkevych
marushkevych
~ 8 years ago

removeItem is invalid - it passes the event to splice, so it always deletes first item

Markdown supported.
Become a member to join the discussionEnroll Today