how to remove first element js

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

1pop(): Remove an item from the end of an array.
2push(): Add items to the end of an array.
3shift(): Remove an item from the beginning of an array.
4unshift(): Add items to the beginning of an array.

1var array = [1, 2, 3]; // array of size 3
2array.shift(); // removes first element

1let numbers = ["I'm Not A Number!", 1, 2, 3];
2numbers.shift();

1var items = ["A", "B", "C", "D"]
2fruits.shift()