March 2017
Intermediate to advanced
821 pages
18h 21m
English
Content preview from JavaScript: Moving to ES2015Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Component life cycle methods
Various methods are executed at specific points in a component's lifecycle. Let's look at them.
componentWillMount()
The componentWillMount() method is invoked once immediately before the initial rendering occurs. If you call setState within this method, render() will see the updated state and will be executed only once despite the state change.
componentDidMount()
The componentDidMount() method is invoked only on the client side. It is invoked only once after initial rendering has occurred.
componentWillReceiveProps(nextProps)
Directly mutating the properties passed to a component will have no effect because there is no way for React to find value changes as it doesn't watch the properties directly. But sometimes, it is ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.