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Front-End Development Projects with Vue.js

You're reading from  Front-End Development Projects with Vue.js

Product type Book
Published in Nov 2020
Publisher Packt
ISBN-13 9781838984823
Pages 774 pages
Edition 1st Edition
Languages
Authors (5):
Raymond Camden Raymond Camden
Profile icon Raymond Camden
Hugo Di Francesco Hugo Di Francesco
Profile icon Hugo Di Francesco
Clifford Gurney Clifford Gurney
Profile icon Clifford Gurney
Philip Kirkbride Philip Kirkbride
Profile icon Philip Kirkbride
Maya Shavin Maya Shavin
Profile icon Maya Shavin
View More author details

Table of Contents (16) Chapters

Preface
1. Starting Your First Vue Project 2. Working with Data 3. Vue CLI 4. Nesting Components (Modularity) 5. Global Component Composition 6. Routing 7. Animations and Transitions 8. The State of Vue.js State Management 9. Working with Vuex – State, Getters, Actions, and Mutations 10. Working with Vuex – Fetching Remote Data 11. Working with Vuex – Organizing Larger Stores 12. Unit Testing 13. End-to-End Testing 14. Deploying Your Code to the Web Appendix

Computed Properties

Computed properties are a unique data type that will reactively update when source data used within the property is updated. They may look like a Vue method, but they are not. In Vue, we can track changes to a data property by defining them as a computed property, add custom logic within this property, and use it anywhere within the component to return a value. Computed properties are cached by Vue, making them more performant for returning data than a data prop or using a Vue method.

Instances where you may use a computed property include but are not limited to:

  • Form validation:

    In this example, an error message will appear when the total data property is less than 1. The computed property for total will update every time a new piece of data is added to the items array:

    <template>
        <div>{{errorMessage}}</div>
    </template>
    <script>
        export default {
         ...
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Front-End Development Projects with Vue.js
Published in: Nov 2020 Publisher: Packt ISBN-13: 9781838984823
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