removing first item array js

1var colors = ["red","blue","car","green"];
2var carIndex = colors.indexOf("car");//get  "car" index
3//remove car from the colors array
4colors.splice(carIndex, 1); // colors = ["red","blue","green"]

1var arr = [1, 2, 3, 4]; 
2var theRemovedElement = arr.shift(); // theRemovedElement == 1
3console.log(arr); // [2, 3, 4]

1
2var list = ["bar", "baz", "foo", "qux"];
3list.shift()//["baz", "foo", "qux"]

1const array1 = [1, 2, 3];
2
3const firstElement = array1.shift();
4
5console.log(array1);
6// expected output: Array [2, 3]
7
8console.log(firstElement);
9// expected output: 1