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FLAVIO COPES
flaviocopes.com
2026

The String padStart() method

By Flavio Copes

Learn how the JavaScript padStart() method adds characters to the start of a string until it reaches a target length, using a space or a pad string you provide.

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The purpose of string padding is to add characters to a string, so it reaches a specific length.

padStart() can be used to add characters at the beginning of a string.

padStart(targetLength [, padString])

Sample usage:

padStart()
‘test’.padStart(4)‘test'
'test’.padStart(5)’ test'
'test’.padStart(8)’    test'
'test’.padStart(8, ‘abcd’)‘abcdtest’

Also see padEnd().

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