react add new object to state array 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: how to update array in react state
this.setState(prevState => ({
arrayvar: [...prevState.arrayvar, newelement]
}))
Example 3: push values to state array class react
this.setState(prevState => ({
arrayvar: [...prevState.arrayvar, newelement]
}))
Example 4: 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]
}));
Example 5: add new array at the back of react state
this.setState(prevState => ({
myArray: [ {"name": "object"}, ...prevState.myArray]
}))