16 lines
387 B
JavaScript
16 lines
387 B
JavaScript
'use strict';
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module.exports = (url, opts) => {
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if (typeof url !== 'string') {
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throw new TypeError(`Expected \`url\` to be of type \`string\`, got \`${typeof url}\``);
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}
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url = url.trim();
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opts = Object.assign({https: false}, opts);
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if (/^\.*\/|^(?!localhost)\w+:/.test(url)) {
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return url;
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}
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return url.replace(/^(?!(?:\w+:)?\/\/)/, opts.https ? 'https://' : 'http://');
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};
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