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JavaScript React Components (2018) Stateful Components and Lifecycle Methods Update the Stopwatch State with componentDidMount()

Posted by ewenearle
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ewenearle
Full Stack JavaScript Techdegree Graduate 18,744 Points

setInterval() inside componentDidMount()

Why you would run a timer function inside componentDidMount()? This way, the function is constantly running in the background, even if start wasn't clicked. Wouldn't that be a bad practice for larger application? Or is it just being used here to show us how componentDidMount() works?

1 Answer

Jeremy Antoine
Jeremy Antoine
15,785 Points
Jeremy Antoine
Jeremy Antoine
15,785 Points

I do believe that he was showing us two things. First, how componentDidMount() begins as soon as the page loads. Second, how it shows, as the start button is pushed, that it starts from 0 again.