正则表达式忽略区分大小写的字符串Java脚本

Question

I am working on a requirement where I need to allow couple of values in a text box before submitting the form. The below regex is working fine but it is allowing strings other than "testing" and "dev". Important thing is it should ignore case sensitive .It should allow "dev","DEV","dEv" etc...

pattern="(?i)^(?:testing|dev|)$" 

Answer 1

The /i flag should get you where you want to go:

pattern = text.match(/^(?:testing|dev|)$/i);

text.match(pattern);

Regexr: http://regexr.com/3e6nd

Answer 2

This code will return an array with the first match for any of the words in the array. Note that the word Development or thetesting will be not a match because it uses the word boundary assertion \\b .

Code:

 var userInput = 'Development thetesting devs Dev testING test testIng', result = userInput.match(/\\b(testing|dev)\\b/i); console.log(result && result[0]);