17 lines
744 B
JavaScript
17 lines
744 B
JavaScript
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// https://github.com/tc39/proposal-string-pad-start-end
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var toLength = require('./_to-length');
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var repeat = require('./_string-repeat');
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var defined = require('./_defined');
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module.exports = function (that, maxLength, fillString, left) {
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var S = String(defined(that));
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var stringLength = S.length;
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var fillStr = fillString === undefined ? ' ' : String(fillString);
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var intMaxLength = toLength(maxLength);
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if (intMaxLength <= stringLength || fillStr == '') return S;
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var fillLen = intMaxLength - stringLength;
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var stringFiller = repeat.call(fillStr, Math.ceil(fillLen / fillStr.length));
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if (stringFiller.length > fillLen) stringFiller = stringFiller.slice(0, fillLen);
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return left ? stringFiller + S : S + stringFiller;
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};
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