How do I add an item to the front of a state array in React

Question

I know that you can add items to the end of the array with concat but how do I unshift to add an item to the front?

Add to the end:

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Answer 1

If you want to modify the original array, use Array.unshift

var arr = [1,2,3];
arr.unshift(0);
arr // 0,1,2,3

If you want a new array, use Array.concat as Alexander suggested

this.setState({statusData: [0].concat(this.state.statusData)})

Which is similar to spreading into a new array

this.setState({statusData: [0, ...this.state.statusData]})