by Sai gowtham

How to bind HTML attributes in Vuejs

How to bind HTML attributes in Vuejs

In this tutorial, we are going to learn about binding HTML attributes in vuejs.

This is our starting code.

<template>
  <div>
    <h1>Binding atrributes in {{title}}</h1>
    <img src="" />
  </div>
</template>

<script>
export default {
  data: function() {
    return {
      title: "Vuejs",
      image: "logo.png"
    };
  }
};
</script>

In the above code, we need to bind the data of our src attribute to display the image.

Inside the data we have image:"logo.png" property, now we need to link our src attribute to image property so that we can display the image.

The problem is curly braces {{}} syntax doesn’t work to bind the data inside the html attributes.

<img src="{{image}}" /> //wrong: doesn't display any image

Attribute binding

To bind the data inside HTML attributes vue.js provides us a v-bind directive.

syntax usage.

<img v-bind:src="image" /> // user can see image now

Here v-bind directive binds the element src attribute to a image expression, so we can see the image.

Shorthand syntax

There is also a shorthand syntax of v-bind:attributename, which can be also written as just :attributename.

<!-- fullhand syntax -->
<img v-bind:src="image" />

<!-- shorthand syntax -->
<img :src="image"/>

Similarly, we can use this syntax with other HTML attributes.

<button :disabled="isActive">Click</button>

<a :href="url">My link</a>

<div :class="myClassname"></div>

v-bind directive evaluates the JavaScript expression present inside the quotes v-bind:src="js expression".

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