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polyfill.js « string.prototype.trimstart « node_modules - github.com/npm/cli.git - Unnamed repository; edit this file 'description' to name the repository.
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'use strict';

var implementation = require('./implementation');

module.exports = function getPolyfill() {
	if (!String.prototype.trimStart && !String.prototype.trimLeft) {
		return implementation;
	}
	var zeroWidthSpace = '\u200b';
	var trimmed = zeroWidthSpace.trimStart ? zeroWidthSpace.trimStart() : zeroWidthSpace.trimLeft();
	if (trimmed !== zeroWidthSpace) {
		return implementation;
	}
	return String.prototype.trimStart || String.prototype.trimLeft;
};