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Javascript – Why is '^' not replaced in this regex?

Was working on some regex in JS and noticed something strange when using a negative set. It seems that for some reason the ‘^’ is not matched by the following negative set:

[^a-zA-z0-9]

When I attempt to do a replace on the following string, it results in just the ‘^’ character left:

"'"&@#$%^&".replaceAll(/[^a-zA-z0-9]/g,"") // Result: '^'

Why is this happening? Shouldn’t the negative set match the ‘^’ since it is not found in any of the ranges supplied?

I’ve included the example as a snippet to demonstrate the issue:

console.log("'"&@#$%^&".replaceAll(/[^a-zA-z0-9]/g,""))
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2

Answers


  1. 0

    In the uppercase range there’s a typo… A-z instead of A-Z

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  2. 0

    This is happening because you’re matching both a-z and A-z, with a lower case z instead of upper case Z. Try the following:

    console.log("'"&@#$%^&".replaceAll(/[^a-zA-Z0-9]/g,""))
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