index.js 320 Bytes
'use strict';
module.exports = function (str) {
	var match = str.match(/^[ \t]*(?=\S)/gm);

	if (!match) {
		return str;
	}

	var indent = Math.min.apply(Math, match.map(function (el) {
		return el.length;
	}));

	var re = new RegExp('^[ \\t]{' + indent + '}', 'gm');

	return indent > 0 ? str.replace(re, '') : str;
};