5 years ago Tue, Aug 21, 2018

Prop Destructuring In Vue Js

In a couple of recent tweets, Caleb Porzio demonstrated an easy way to pass Javascript object properties to a child component without declaring a separate prop for each property.

Here's how it works. Let's say that we have a Javascript object with several properties in the data object of a Vue JS component:

data() {
    return {
        post: {
            id: 1,
            name: 'Prop destructuring in Vue Js',
            author: 'Carl Cassar'

Imagine that you want to pass this data to a child component. One way of doing it, is to declare a prop for each of the object's properties and pass each one through individually.

<post :id="post.id" :name="post.name" :author="post.author"> </post>

Whilst there is nothing wrong with this approach, it is also possible to pass through the whole object at once by using the v-bind directive.

<post v-bind="post"></post>

Behind the scenes, Vue will 'destructure' the post object and pass through each property to the 'post` component as a prop.

props: {
    id: Number,
    name: String,
    author: Object

As you can see, this still allows us to validate the prop and set a sensible default as we would normally.

In the interest of giving credit where credit is due, here's the original tweet with Caleb's great tip:

You can see all of the uses for the v-bind directive in the docs and follow @calebporzio on Twitter. He's been posting some great tips recently and is well worth following.

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