how to shift in javascript syntax code example

Example 1: removing first item array js

var list = ["bar", "baz", "foo", "qux"];
list.shift()//["baz", "foo", "qux"]

Example 2: javascript shift

let array = ["A", "B", "C"];

//Removes the first element of the array
array.shift();

//===========================
console.log(array);
//output =>
//["B", "C"]