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Can you help me to build a regex that matches a valid W3C HTML 4.01 id value?
According with W3C specs:
ID and NAME tokens must begin with a letter ([A-Za-z]) and may be
followed by any number of letters, digits ([0-9]), hyphens (“-“),
underscores (“_”), colons (“:”), and periods (“.”).
You can use this regex
^depicts the start of string[a-zA-Z]matches an uppercase or lowercase letter*matches the preceding character 1 to many times\wis similar to[a-zA-Z\d_]$is the end of string