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JavaScript

Norman Lew
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Norman Lew
Full Stack JavaScript Techdegree Graduate 14,784 Points
Posted by Norman Lew
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Norman Lew
Full Stack JavaScript Techdegree Graduate 14,784 Points

Function in setInterval

In the function below, how come you have to precede "this.tick()" with "() =>" ?

componentDidMount() {
    this.intervalID = setInterval( () => this.tick(), 100)
}

1 Answer

Steven Parker
Steven Parker
231,141 Points
Steven Parker
Steven Parker
231,141 Points

That creates an anonymous function. Without seeing the context, I'd guess it might be to control the binding of "this".

But try it this way and see if it works:

componentDidMount() {
    this.intervalID = setInterval(this.tick, 100)
}