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import createPadding from './.internal/createPadding.js'
import stringSize from './.internal/stringSize.js'
/**
* Pads `string` on the left side if it's shorter than `length`. Padding
* characters are truncated if they exceed `length`.
*
* @since 4.0.0
* @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
*
* padStart('abc', 6)
* // => ' abc'
*
* padStart('abc', 6, '_-')
* // => '_-_abc'
*
* padStart('abc', 2)
* // => 'abc'
*/
function padStart(string, length, chars) {
const strLength = length ? stringSize(string) : 0
return (length && strLength < length)
? (createPadding(length - strLength, chars) + string)
: (string || '')
}
export default padStart
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