The ƒ character doesn't seem to be a match for the JavaScript regex

I am facing a requirement to only allow (extended) ASCII characters in my input. As a solution, I've implemented a JavaScript regex pattern like this:

/^[\x20-\xff]+$/.test("helloê¿£×جáƒ")

However, this doesn't work as expected. Interestingly, when I remove the function sign (159 in extended ASCII), it works fine. This is perplexing because characters like á (160) and × (158) are accepted, indicating that some extended ASCII characters are being allowed.

It seems like there might be something obvious that I'm overlooking here, but what could it be?

javascriptregexascii

Answer №1

My issue stemmed from my post being in ISO-8859-1, where the character ƒ is not within the range \x20-\xff. Big thanks to @Wiktor Stribiżew for the assistance!

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