How to empty a JavaScript array

Dec 3, 2018

Learn how to empty a JavaScript array, either by setting its length to 0 to clear it in place or by reassigning the variable to a new empty array with let.

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There are various ways to empty a JavaScript array.

The easiest one is to set its length to 0:

const list = ['a', 'b', 'c']
list.length = 0

Another method mutates the original array reference, assigning an empty array to the original variable, so it requires using let instead of const:

let list = ['a', 'b', 'c']
list = []

Tagged: JavaScript · All topics

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