JavaScript Spread and Rest Operators.

 

JavaScript Spread and Rest Operators.

1. JavaScript Spread Operator.

    JavaScript spread operator used for modifying or merging array.    

let a = [1,2,3,3];

let b = [4,5,6,7,3];

let output = [...a, ...b];

console.log('output--->', output);

// output : output---> [1, 2, 3, 3, 4, 5, 6, 7, 3]

2. JavaScript Rest Operator.

    JavaScript Rest Operator used for We don't know the number of parameters come in the function.

function call(...data) {

    console.log('data---->', data);    

}

call(1,2,3,4,5);

// output : data----> [ 1, 2, 3, 4, 5 ]