// Tutorial //

Conditional Directives With Vue.js

Published on December 16, 2016
Default avatar
By Alligator.io
Developer and author at DigitalOcean.
Conditional Directives With Vue.js

The ability to show or hide elements based on conditions is a fundamental feature of any frontend framework. Vue.js provides us with a set of core directives to achieve this effect: v-if, v-else, v-else-if and v-show.

After getting started with a Vue.js Hello World application, we can use values from JavaScript data object to conditionally control the view. For example, we’ll see how to use the simple data object given below.

data() {
  return {
    msg: "Hello World!",
    isLoggedIn: false


The v-if directive adds or removes DOM elements based on the given expression.

We can use the isLoggedIn property from the data model and show a login button in the view.

<button v-if="isLoggedIn">Logout</button>

Now, the button will not show because isLoggedIn is set to false. Setting the data.isLoggedIn value to true would add the button to the DOM.

<template> element

The v-if directive can only show or hide one element (and its child elements), but you can also control multiple elements with a single v-if reducing duplication.

To do this, you need to wrap all the elements that should be controlled by this condition in a <template> element. The template element itself will not be added to the DOM. But all containing elements will be added or removed depending on the v-if expression.

For example, if you need to show a label as well as a button when the isLoggedIn is true you can wrap both elements in a single template element as follows.

<template v-if="isLoggedIn">
  <label> Logout </button>
  <button> Logout </button>


As the name v-else suggests, this directive is used to display content only when the expression adjacent v-if resolves to false.

We can have a Log In button to show automatically when the isLoggedIn is false.

<button v-if="isLoggedIn"> Logout </button>
<button v-else> Log In </button>

v-else does not need a value passed in to it. But it must be in an element that comes immediately after an element containing v-if or v-else-if directives.


v-else-if can be used when we need more than two options to be checked. This will ensure that only one of the chained items in the else-if chain will be visible.

For example, if the property named isLoginDisabled is true, we can prevent the Log In button from displaying and instead display a label. We can accomplish it by using the v-else-if directive as follows.

<button v-if="isLoggedIn"> Logout </button>
<label v-else-if="isLoginDisabled"> Register disabled </label>
<button v-else> Log In </button>


Very similar to v-if, the v-show directive can also be used to show and hide an element based on an expression.

The main difference between the two is that,

  • v-if - Only renders the element to the DOM if the expression passes.
  • v-show - Renders all elements to the DOM and then uses the CSS display property to hide elements if the expression fails.
  • v-show - Does not support v-else, v-else-if

Usually, v-show has a performance advantage if the elements are switched on and off frequently, while the v-if has the advantage when it comes to initial render time.

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in our Questions & Answers section, find tutorials and tools that will help you grow as a developer and scale your project or business, and subscribe to topics of interest.

Sign up
About the authors
Default avatar
Developer and author at DigitalOcean.

Still looking for an answer?

Was this helpful?
Leave a comment