Array shift()

JavaScript Array shift() Definition

The shift () method removes the first element of the array. Returns the removed item. This method changes the length of the array. If the length of the array is zero, it returns the value of undefined.

Syntax:

array.shift()

Let’s understand the logic with a small example:

    let names = ["john", "rick", "bob"];
    console.log(names);

    let remove = names.shift();

    console.log("remove: " + remove)

    console.log("new array: "+names)

[“john”, “rick”, “bob”]
remove: john
[“rick”, “bob”]

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JavaScript Array shift() Example

        let list = [];
        let newList = list.shift();
        console.log(newList);
        console.log(list);

        let pushList = list.push("a", "b", "c");
        console.log("number of elements: " + pushList)
        console.log("new array: " + list)

output:

undefined
[]
number of elements: 3
new array: a,b,c

Depending on this example I am writing this:

        let arr = list.shift();
        console.log(list)

output:

[“b”, “c”]

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Browser Support

Chrome	1
Edge	yes
Firefox	1
Internet Explorer	5.5
Opera	yes
Safari	yes
Android webview	yes
Chrome for Android	yes
Edge mobile	yes
Firefox for Android	4
Opera Android	yes