pad

Pads a string on both sides to reach a specified length.

const padded = pad(str, length, chars);

Reference

pad(str, length, chars?)

Use pad when you want to pad both sides of a string with characters to match a specified length when the string is shorter than the target length. If the padding cannot be evenly distributed on both sides, the right side will have one more character.

import { pad } from 'es-toolkit/string';

// Padding with default whitespace
pad('abc', 8);
// => '  abc   '

// Padding with custom characters
pad('abc', 8, '_-');
// => '_-abc_-_'

// When the string is already longer than or equal to the target length
pad('abc', 3);
// => 'abc'

pad('abcdef', 3);
// => 'abcdef'

When padding characters cannot be evenly distributed to the target length, the right side will be longer.

import { pad } from 'es-toolkit/string';

pad('abc', 9, '123');
// => '123abc123' (left 3 characters, right 3 characters)

pad('abc', 10, '123');
// => '123abc1231' (left 3 characters, right 4 characters)

Parameters

• str (string): The string to pad.
• length (number): The target length.
• chars (string, optional): The characters to use for padding. Defaults to ' '.

Returns

(string): Returns the padded string.