Check whether a string matches a regex in JS - Stack Overflow
Jan 9, 2023 · I wouldn't rely on this behavior. It depends on your environment's implementation of test(). (match fails because numbers don't have a match member). I'd reccomend explicitly …
How can I validate an email address in JavaScript?
Sep 5, 2008 · @kommradHomer -- a "regex invalid" address is almost always valid, because whatever regex you use to validate an email address is almost certainly wrong and will …
JavaScript RegExp.test () returns false, even though it should return ...
Jul 31, 2011 · This is a common behavior that the the exec or test methods show when you deal with patterns that have the global g flag. The RegExp object will keep track of the lastIndex …
JavaScript: test vs exec - Stack Overflow
If you only need to test an input string to match a regular expression, RegExp.test is most appropriate. It will give you a boolean return value which makes it ideal for conditions. …
Case insensitive regex in JavaScript - Stack Overflow
Feb 18, 2020 · For example to search word date, upper or lowercase you need to add param i. i = means incasesensitive. example. const value = "some text with dAtE"; /date/i.test(value) or. …
jquery - javascript check if regex apply - Stack Overflow
Nov 12, 2012 · I've got this regex validation (thanks to The Mask) which works great. Now, I want to check with an if-statement if this regex applies to some string or not. I'm using Javascript …
RegEx for Javascript to allow only alphanumeric - Stack Overflow
Jun 29, 2015 · @Greg, I enjoy how you explain your regex-related answers. Regexes without explanations, in my opinion, are kind of useless. Because you get that one-time "yeah it …
javascript - How to test valid UUID/GUID? - Stack Overflow
Oct 26, 2011 · The following regex takes this into account and will return a match for a NIL UUID. See below for a UUID which only accepts non-NIL UUIDs. Both of these solutions are for …
javascript - RegExp in TypeScript - Stack Overflow
Aug 4, 2022 · The Regex literal notation is commonly used to create new instances of RegExp. regex needs no additional escaping v / regex / gm ^ ^ ^ start end optional modifiers As others …
Regular expression for URL validation (in JavaScript)
Sep 11, 2009 · The actual URL syntax is pretty complicated and not easy to represent in regex. Most of the simple-looking regexes out there will give many false negatives as well as false …