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import createPadding from './.internal/createPadding.js'
import stringSize from './.internal/stringSize.js'
/**
* Pads `string` on the left and right sides if it's shorter than `length`.
* Padding characters are truncated if they can't be evenly divided by `length`.
*
* @since 3.0.0
* @category String
* @param {string } [string=''] The string to pad.
* @param {number } [length=0] The padding length.
* @param {string } [chars=' '] The string used as padding.
* @returns {string } Returns the padded string.
* @example
*
* pad('abc', 8)
* // => ' abc '
*
* pad('abc', 8, '_-')
* // => '_-abc_-_'
*
* pad('abc', 2)
* // => 'abc'
*/
function pad ( string , length , chars ) {
const strLength = length ? stringSize ( string ) : 0
if ( !length || strLength >= length ) {
return ( string || '' )
}
const mid = ( length - strLength ) / 2
return (
createPadding ( Math . floor ( mid ) , chars ) +
string +
createPadding ( Math . ceil ( mid ) , chars )
)
}
export default pad
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