--- /dev/null
+// https://github.com/tc39/proposal-string-pad-start-end
+var toLength = require('../internals/to-length');
+var repeat = require('../internals/string-repeat');
+var requireObjectCoercible = require('../internals/require-object-coercible');
+
+var ceil = Math.ceil;
+
+// `String.prototype.{ padStart, padEnd }` methods implementation
+var createMethod = function (IS_END) {
+ return function ($this, maxLength, fillString) {
+ var S = String(requireObjectCoercible($this));
+ var stringLength = S.length;
+ var fillStr = fillString === undefined ? ' ' : String(fillString);
+ var intMaxLength = toLength(maxLength);
+ var fillLen, stringFiller;
+ if (intMaxLength <= stringLength || fillStr == '') return S;
+ fillLen = intMaxLength - stringLength;
+ stringFiller = repeat.call(fillStr, ceil(fillLen / fillStr.length));
+ if (stringFiller.length > fillLen) stringFiller = stringFiller.slice(0, fillLen);
+ return IS_END ? S + stringFiller : stringFiller + S;
+ };
+};
+
+module.exports = {
+ // `String.prototype.padStart` method
+ // https://tc39.es/ecma262/#sec-string.prototype.padstart
+ start: createMethod(false),
+ // `String.prototype.padEnd` method
+ // https://tc39.es/ecma262/#sec-string.prototype.padend
+ end: createMethod(true)
+};