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// It will include the space before as well (if it has one)
/(^| )(https?:\/\/)?(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,8}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)/gi
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(https?:\/\/(?:www\.|(?!www))[a-zA-Z0-9][a-zA-Z0-9-]+[a-zA-Z0-9]\.[^\s]{2,}|www\.[a-zA-Z0-9][a-zA-Z0-9-]+[a-zA-Z0-9]\.[^\s]{2,}|https?:\/\/(?:www\.|(?!www))[a-zA-Z0-9]+\.[^\s]{2,}|www\.[a-zA-Z0-9]+\.[^\s]{2,})
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// All are 'non-capturing' regular expressions.
// General format of a URL in a RegEx:
(?:(?:https?|ftp):\/\/)?(?:www\.)?[^/\r\n]+(?:/[^\r\n]*)?
// To enforce the protocol
(?:https?|ftp):\/\/(?:www\.)?[^/\r\n]+
// To enforce the protocol and trailing slash
(?:https?|ftp):\/\/(?:www\.)?[^/\r\n]+(?:/[^\r\n]*)
// To enforce file extensions like .html or .png:
(?:(?:https?|ftp):\/\/)?(?:www\.)?[^/\r\n]+(?:/[^\r\n]*)(?:[a-zA-Z0-9]+.(?:html|png|webp|js))
// To implement in GO (https://go.dev), add an extra backslash (' \ ') to every unescaped backslash (' \ ')
// For the first format, that is:
(?:(?:https?|ftp):\\/\\/)?(?:www\\.)?[^/\r\n]+(?:/[^\r\n]*)?
// You do not need to add the extra backslash to the '\r' and '\n' because it is handled natively
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const isUrlValid = (url: string) => {
const urlMatcher =
/^[(http(s)?):\/\/(www\.)?a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+.~#?&//=]*)/i;
return !!url?.match(new RegExp(urlMatcher));
}
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/^(?:(?:https?|ftp):\/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,}))\.?)(?::\d{2,5})?(?:[/?#]\S*)?$/i
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/(?:(?:https?|ftp|file):\/\/|www\.|ftp\.)(?:\([-A-Z0-9+&@#\/%=~_|$?!:,.]*\)|[-A-Z0-9+&@#\/%=~_|$?!:,.])*(?:\([-A-Z0-9+&@#\/%=~_|$?!:,.]*\)|[A-Z0-9+&@#\/%=~_|$])/igm
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/^https?:\/\/(?:www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b(?:[-a-zA-Z0-9()@:%_\+.~#?&\/=]*)$/
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https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)
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var expression = /[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)?/gi;
var regex = new RegExp(expression);
var t = 'www.google.com';
if (t.match(regex)) {
alert("Successful match");
} else {
alert("No match");
}
Run code snippet