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APIs Fetching Data with Axios

Ovidiu Cotorogea
Ovidiu Cotorogea
12,998 Points

Why does the function statement of vanilla js doesn't work?

I know it may be a bit stupid, but why doesn't it works like this

.then(function(response) { this.setState({ gifs: response.data.data, loading: false }) })

But works like this?

.then(response => { this.setState({ gifs: response.data.data, loading: false }) })

The difference lays in the function syntax

Ovidiu Cotorogea
Ovidiu Cotorogea
12,998 Points

Woops, my bad! It's updated now

1 Answer

Brendan Whiting
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.a{fill-rule:evenodd;}techdegree seal-36
Brendan Whiting
Front End Web Development Techdegree Graduate 84,696 Points

I think the issue with the this in the function. Arrow function inherits this from it's scope, it doesn't have it's own this. So this.setState is going to break if you use the traditional function. This section of the MDN docs explains this concept in more detail.