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fix(isMail):fixed consecutive hyphen check in domain part #2287

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fix(isMail):fixed consecutive hyphen check in domain part #2287

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6 changes: 6 additions & 0 deletions src/lib/isFQDN.js
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@ const default_fqdn_options = {
allow_numeric_tld: false,
allow_wildcard: false,
ignore_max_length: false,
disallow_consecutive_hyphens: true,
};

export default function isFQDN(str, options) {
Expand All @@ -19,6 +20,11 @@ export default function isFQDN(str, options) {
str = str.substring(0, str.length - 1);
}

/* Check for consecutive hyphens in the domain part */
if (options.disallow_consecutive_hyphens && /--/.test(str)) {
return false;
}

/* Remove the optional wildcard before checking validity */
if (options.allow_wildcard === true && str.indexOf('*.') === 0) {
str = str.substring(2);
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