React.js Essentials by 2015

Author:2015
Language: eng
Format: epub
Publisher: Packt Publishing

You can use these arguments to prepare for the DOM update. However, you cannot use this.setState() in the componentWillUpdate() method. If you want to update the component's state in response to its properties change, then do that in the componentWillReceiveProps() method, which will be called by React when the properties change.

To demonstrate when the componentWillUpdate() method is called, we need to log it in the StreamTweet component. Add this code after the shouldComponentUpdate() method:

componentWillUpdate: function (nextProps, nextState) { console.log('[Snapterest] StreamTweet: 6. Running componentWillUpdate()'); },

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