Question

81

convert regex string to regex object in javascript

rated 0 times [ 85] [ 4] / answers: 1 / hits: 19540 / 10 Years ago, wed, august 27, 2014, 12:00:00

I am getting regex string from json object (yes its dynamic and will be always be string) i want to test this with textbox value.

But even if i pass valid input text it does not pass regex condition

code :

var pattern = /^[A-Za-zs]+$/;

var str = Some Name;

pattern = new RegExp(pattern);

if(pattern.test(str))

{

    alert('valid');

}

else

{

    alert('invalid');

}

Fiddle :- http://jsfiddle.net/wn9scv3m/

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robinh

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2 Years ago

answered 10 Years ago jadyngraysons · Accepted Answer

Two problems:

You need to escape the backslash.

You need to remove the forward slashes on the beginning and end of string.

Corrected code:

var pattern = ^[A-Za-z\s]+$;

var str = Some Name;

pattern = new RegExp(pattern);

if(pattern.test(str))

{

    alert('valid');

}

else

{

    alert('invalid');

}

http://jsfiddle.net/wn9scv3m/3/