When ... occurs in a function call or alike, it’s called a spread syntax and expands an array into a list. code example

Example 1: spread operator

function sum(x, y, z) {
  return x + y + z;
}

const numbers = [1, 2, 3];

console.log(sum(...numbers));
// expected output: 6
// This will add each item in number arrray in sum method.

console.log(sum.apply(null, numbers));
// expected output: 6

Example 2: spread and rest operator javascript

function myData(...args){console.log(args) ; // ["Marina",24,"Front-End Developer"]}myData("Marina",24,"Front-End Developer") ;