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Asked: 2026-05-28T13:45:30+00:00

I have this regex on Javascript : var myString=aaa@aaa.com; var mailValidator = new RegExp(\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*);

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I have this regex on Javascript :

var myString="aaa@aaa.com";
var mailValidator = new RegExp("\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*");
if (!mailValidator.test(myString))
{
    alert("incorrect");
}

but it shouldn’t alert “incorrect” with aaa@aaa.com.

It should return “incorrect” for aaaaaa.com instead (as example).

Where am I wrong?

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1 Answer

  1. Editorial Team

    It works if you do this:

    var mailValidator = /\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/;

    What happens in yours is that you need to double escape the backslash because they’re inside a string, like "\\w+([-+.]\\w+)*...etc

    Here’s a link that explains it (in the “How to Use The JavaScript RegExp Object” section).

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