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:

var         


        

Answer 1

Is there a problem doing

[data.statuses].concat(allStatuses);

If you are using ES6, you can do

var newStatuses = [data.statuses, ...allStatuses]