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50 lines
1.3 KiB
JavaScript
50 lines
1.3 KiB
JavaScript
var createPadding = require('./_createPadding'),
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stringSize = require('./_stringSize'),
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toInteger = require('./toInteger'),
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toString = require('./toString');
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/* Built-in method references for those with the same name as other `lodash` methods. */
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var nativeCeil = Math.ceil,
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nativeFloor = Math.floor;
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/**
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* Pads `string` on the left and right sides if it's shorter than `length`.
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* Padding characters are truncated if they can't be evenly divided by `length`.
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*
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* @static
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* @memberOf _
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* @since 3.0.0
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* @category String
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* @param {string} [string=''] The string to pad.
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* @param {number} [length=0] The padding length.
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* @param {string} [chars=' '] The string used as padding.
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* @returns {string} Returns the padded string.
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* @example
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*
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* _.pad('abc', 8);
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* // => ' abc '
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*
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* _.pad('abc', 8, '_-');
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* // => '_-abc_-_'
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*
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* _.pad('abc', 3);
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* // => 'abc'
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*/
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function pad(string, length, chars) {
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string = toString(string);
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length = toInteger(length);
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var strLength = length ? stringSize(string) : 0;
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if (!length || strLength >= length) {
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return string;
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}
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var mid = (length - strLength) / 2;
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return (
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createPadding(nativeFloor(mid), chars) +
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string +
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createPadding(nativeCeil(mid), chars)
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);
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}
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module.exports = pad;
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