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