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ReactJS by Example - Building Modern Web Applications with React

You're reading from  ReactJS by Example - Building Modern Web Applications with React

Product type Book
Published in Apr 2016
Publisher Packt
ISBN-13 9781785289644
Pages 280 pages
Edition 1st Edition
Languages
Author (1):
Vipul A M Vipul A M
Profile icon Vipul A M

Table of Contents (20) Chapters

ReactJS by Example - Building Modern Web Applications with React
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. Getting Started with React 2. JSX in Depth 3. Data Flow and Life Cycle Events 4. Composite Dynamic Components and Forms 5. Mixins and the DOM 6. React on the Server 7. React Addons 8. Performance of React Apps 9. React Router and Data Models 10. Animation 11. React Tools 12. Flux 13. Redux and React Index

Controlled components


"What is a controlled component, Mike?" asked Shawn.

"It's an input component whose value is controlled by React. By providing the value prop, we are informing React that the value of this field is "Shawn". Once React has declared it to be "Shawn", any user input won't have an effect as the value is already set in the ." explained Mike.

"I think that we have to resort to state instead of props?" Shawn asked.

"Exactly. As an user is interacting with the input field, we need to update the value prop using state and onChange event handler. Can you give it a try?" suggested Mike.

// src/index.js

var InputExample = React.createClass({
  getInitialState() {
    return (
      { name: '-'}
    );
  },

  handleChange(event) {
    this.setState({ name: event.target.value });
  },

  render() {
    return (
      <input type="text"
             value={this.state.name}
             onChange={this.handleChange} />
    );
  }
});

"Awesome. This pattern of making the value of...

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