React.createClass versus extends React.Component:  #ReactJS
  • import React from ‘react’ ; class Contacts extends React .
  • Component , which extends the Component class instead of calling createClass .
  • React traditionally provided the React.createClass method to create component classes, and released a small syntax sugar update to allow for better use with ES6 modules by extends React.
  • Component { constructor ( props ) { super ( props ); } render () { return ( < div >< /div > ); } } export default Contacts ;
  • log ( this ); // React Component instance }, render () { return ( < div onClick = { this .

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