[ES6] 13. Using the ES6 spread operator ...

The spread operator (...) allows you to "explode" an array into its individual elements.

Spreate an array:

console.log([1,2,3]);  // [1, 2, 3]

console.log(...[1,2,3]);  // 1 2 3

Spread out the second array and push that in first array:

let first = [1,2,3];

let second = [4,5,6];

first.push(second);

console.log(first); //  [1, 2, 3, [4, 5, 6]]

first.push(...second);

console.log(first); // [1, 2, 3, 4, 5, 6]

Pushing in an array of parameters:

let var1 = [1,2,3];

let var2 = [4,5,6];

function sumUp(a,b,c){

  console.log( a+b+c );

}

sumUp(...var1); //

sumUp(...var2); //

巴特西

[ES6] 13. Using the ES6 spread operator ...

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