17

I need to test an input field (<input type="text" />) against this regex: 

[^'"]+

This obviously is no easy task as I cannot use " inside the attribute. Using the quot entity does not seem to work as it gets interpreted literally by the regex engine.

How can I accomplish this?

Volker E.
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karttoffelheinz
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2 Answers2

50

The HTML5 @pattern attribute regex is based on JavaScript regex, so you can use hexadecimal notation or unicode notation for that char as you would in JavaScript:

" = \x22 OR \u0022
' = \x27 OR \u0027

So that you can easily use

pattern="[^'\x22]+"

TADA! No JavaScript libraries involved! ;)

David Strencsev
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4

You can use Hexadecimal notation instead of ' or ".

pattern="[^'\x22]+"


<form action="#">
<input type="text" title="no quotes!" pattern="[^'\x22]+">
<button type="submit">submit</button>
</form>