add value to array react setState code example
Example 1: how to add array data on state react
this.setState({ myArray: [...this.state.myArray, 'new value'] }) //simple value
this.setState({ myArray: [...this.state.myArray, ...[1,2,3] ] }) //another array
Example 2: add object to array setstate
To push to the beginning of the array do it this way
this.setState( prevState => ({
userFavorites: [{id: 3, title: 'C'}, ...prevState.userFavourites]
}));