Computed Property in Vue

Computed properties are a super handy feature that allows you to define functions that are cached based on their dependencies and are only re-evaluated when one of those dependencies changes.

So why are computed properties so great? Well, they’re perfect for performing complex calculations or transformations on data before it’s displayed in the template. For example, you might want to concatenate two strings or perform some math on a set of numbers.

To define a computed property in Vue.js, you simply use the “computed” property on a Vue instance. Here’s an example:

new Vue({
  data: {
    firstName: 'John',
    lastName: 'Doe'
  computed: {
    fullName: function () {
      return this.firstName + ' ' + this.lastName

In this example, we’re defining a computed property called “fullName” that concatenates the “firstName” and “lastName” properties from the data object.

The best part about computed properties is that they can be used in templates just like regular properties. So if you want to display the “fullName” property in your template, you can simply do this:

  <p>Full Name: {{ fullName }}</p>

And that’s it! Computed properties are a simple yet powerful feature of Vue.js that can make your life as a developer a whole lot easier. So if you haven’t already, give them a try and see how they can improve your code.