JavaScript Glossary: Array .shift() Method

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Basics

This method takes out the first element from an array and returns it. The shift method mutates the array during this process, reducing its length.

[1, 2, 3, 4, 5].shift()
// 1

https://scotch.io/embed/gist/736d1e62476a0aed92ebe6b1b1b770dc

This method when called:

• Removes the element at the beginning of the array.
• Mutates the parent array reducing the length.
• Returns the removed element.

Syntax

array.shift()

No Parameters

Returns a string

The method will return the element removed from the array. If the array is empty, it returns undefined.

const names = ['Johnny', 'Pete', 'Sammy']
console.log(names.shift());
// output: 'Johnny'

Common Usage and Snippets

Removing the index element from an array.

https://scotch.io/embed/gist/cb772b7b64a09dd288fec7bf15846082