Menu
×
   ❮   
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

Vue Tutorial

Vue HOME Vue Intro Vue Directives Vue v-bind Vue v-if Vue v-show Vue v-for Vue Events Vue v-on Vue Methods Vue Event Modifiers Vue Forms Vue v-model Vue CSS Binding Vue Computed Properties Vue Watchers Vue Templates

Scaling Up

Vue Why, How and Setup Vue First SFC Page Vue Components Vue Props Vue v-for Components Vue $emit() Vue Fallthrough Attributes Vue Scoped Styling Vue Local Components Vue Slots Vue v-slot Vue Scoped Slots Vue Dynamic Components Vue Teleport Vue HTTP Request Vue Template Refs Vue Lifecycle Hooks Vue Provide/Inject Vue Routing Vue Form Inputs Vue Animations Vue Animations with v-for Vue Build Vue Composition API

Vue Reference

Vue Built-in Attributes Vue Built-in Components Vue Built-in Elements Vue Component Instance Vue Directives Vue Instance Options Vue Lifecycle Hooks

Vue Examples

Vue Examples Vue Exercises Vue Quiz Vue Server Vue Certificate

Vue v-bind Directive


Example

Using the v-bind directive to change the background color of a <div> element.

<template>
  <h2>Example v-bind Directive</h2>
  <p>The v-bind directive connects the style attribute of the DIV element to the 'colorVal' data property.</p>
  <div v-bind:style="{ backgroundColor: colorVal }">DIV element</div>
  <p>Use the input type="color" box below to change the color.</p>
  <p><input type="color" v-model="colorVal"> <pre>colorVal: '{{ colorVal }}'</pre></p>
</template>
Run Example »

See more examples below.


Definition and Usage

The v-bind directive is used to bind an HTML attribute to a property in the Vue instance (Example above), or to pass props (Example 1 below).

If we change a Vue instance property, and that property is bound to an HTML attribute with v-bind, the HTML element will be updated with the new attribute value automatically thanks to Vue's reactivity system.

The shorthand for 'v-bind:' is simply ':', or '.' when used with the .prop modifier.

These modifiers can be used with the v-bind directive, but are often not needed:

Modifier Details
.camel Transforms an attribute name from kebab-case to camelCase. This is not need when using a build step, or when using String templates.
.prop Forces a binding to be set as a DOM property. Unless working with custom elements, Vue will find out if the key provided with v-bind is a DOM property or an attribute to the element, and bind the key appropriately.
.attr Forces a binding to be set as a DOM attribute. Unless working with custom elements, Vue will find out if the key provided with v-bind is a DOM property or an attribute to the element, and bind the key appropriately.

More Examples

Example 1

Using v-bind to send the 'img' prop, with data type boolean (true/false).

<template>
  <h2>Example v-bind Directive</h2>
  <p>Two props are sent to the component. We must use v-bind for the prop with 'boolean' data type.</p>
  <button v-on:click="this.img = !this.img">Toggle 'img' prop value</button> {{ img }}
  <info-box 
    turtle-text="Turtles can hold their breath for a long time."
    v-bind:turtle-img="img"
  />
</template>

<script>
export default {
  data() {
    return {
      img: true
    }
  }
}
</script>
Run Example »

Example 2

Using the 'v-bind:' shorthand ':'.

<template>
  <h2>Example v-bind Directive</h2>
  <p>Two props are sent to the component. We must use v-bind for the prop with 'boolean' data type.</p>
  <button v-on:click="this.img = !this.img">Toggle 'img' prop value</button> {{ img }}
  <info-box 
    turtle-text="Turtles can hold their breath for a long time."
    :turtle-img="img"
  />
</template>

<script>
export default {
  data() {
    return {
      img: true
    }
  }
}
</script>
Run Example »

Example 3

Using the .prop modifier to change the indeterminate DOM property of the checkbox.

<template>
  <p>Using the '.prop' modifier to toggle the 'indeterminate' appearance of the checkbox:</p>
  <button v-on:click="indetVal = !indetVal">Toggle</button>
  <p>
    <input type="checkbox" v-bind:indeterminate.prop="indetVal"> Checkbox
  </p>
</template>

<script>
export default {
  data() {
    return {
      indetVal: false
    };
  }
};
</script>

<style>
input {
  margin: 20px;
  scale: 2;
}
</style>
Run Example »

Example 4

Using the .prop modifier shorthand, and the v-bindshorthand, so that 'v-bind:indeterminate.prop' becomes '.indeterminate'.

<template>
  <p>Using the '.prop' shorthand so that 'v-bind:indeterminate.prop' becomes '.indeterminate':</p>
  <button v-on:click="indetVal = !indetVal">Toggle</button>
  <p>
    <input type="checkbox" .indeterminate="indetVal"> Checkbox
  </p>
</template>

<script>
export default {
  data() {
    return {
      indetVal: false
    };
  }
};
</script>

<style scoped>
input {
  margin: 10px;
  scale: 2;
}
</style>
Run Example »

Related Pages

Vue Tutorial: Vue CSS Binding

Vue Tutorial: Vue v-bind Directive

Vue Tutorial: Vue Props


W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.