17 lines
361 B
JavaScript
17 lines
361 B
JavaScript
/**
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* Check if a sub-domain is valid
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* @param {String} hostname sub-domain
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* @returns {Boolean} true if valid
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*/
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const isValidHost = (hostname) => {
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if (typeof hostname !== 'string') {
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return false;
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}
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const regex = /^[\dA-Za-z]([\dA-Za-z-]{0,61}[\dA-Za-z])?$/;
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return regex.test(hostname);
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};
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module.exports = {
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isValidHost,
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};
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