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Easiest, if you are using ES6.
ES6
initialArray = [1, 2, 3]; newArray = [ ...initialArray, 4 ];4]; // --> [1,2,3,4]
New array will be [1,2,3,4]
[1,2,3,4]
to update your state in React
this.setState({ arrayvar: [...this.state.arrayvar, newelement] });
Learn more about array destructuring
initialArray = [1, 2, 3]; newArray = [ ...initialArray, 4 ]; // --> [1,2,3,4]
this.setState({ arrayvar:[...this.state.arrayvar, newelement] });
initialArray = [1, 2, 3]; newArray = [...initialArray, 4]; // --> [1,2,3,4]
this.setState({arrayvar:[...this.state.arrayvar, newelement]});
