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| 'use strict';
| module.exports = function (url) {
| if (typeof url !== 'string') {
| throw new TypeError('Expected a string, got ' + typeof url);
| }
|
| url = url.trim();
|
| if (/^\.*\/|^(?!localhost)\w+:/.test(url)) {
| return url;
| }
|
| return url.replace(/^(?!(?:\w+:)?\/\/)/, 'http://');
| };
|
|
