<div>
The &quot;contains&quot; function I've used above is as suggested in a comment here: <a href="https://css-tricks.com/snippets/javascript/javascript-array-contains/" rel="ugc">https://css-tricks.com/snippets/javascript/javascript-array-contains/</a><br />
<br />
The code is tested and working (you can see the output in your browser console).
</div>


The "contains" function I've used above is as suggested in a comment here: https://css-tricks.com/snippets/javascript/javascript-array-contains/ [https://css-tricks.com/snippets/javascript/javascript-array-contains/]

The code is tested and working (you can see the output in your browser console).

<div>
Hi Terry,<br />
I'm looking for optimal performance. Would this approach be the optimal way? <br />
<br />
Thanks!
</div>


Hi Terry,
I'm looking for optimal performance. Would this approach be the optimal way?

Thanks!

<div>
It's probably very close to optimal for a list of the given length, and should be extremely fast. It's an order-n-squared algorithm though, so a very long list will start to cause poor performance.
</div>


It's probably very close to optimal for a list of the given length, and should be extremely fast. It's an order-n-squared algorithm though, so a very long list will start to cause poor performance.

<div>
The list will get a lot longer than I posted here. Maybe 2-3 times as long?
</div>


The list will get a lot longer than I posted here. Maybe 2-3 times as long?

<div>
<div class="content wysiwyg-content">
I need to test if a variable is any one of the following:<br />
<br />
botwsitecoredevcms<br />
botw-web<br />
accountopening<br />
wuatlive<br />
wuat2live<br />
wuat3live<br />
testlive1<br />
testlive2<br />
testlive3<br />
testhoplive1<br />
testhoplive2<br />
testhoplive3<br />
wwwstage<br />
www<br />
blog<br />
mobile<br />
<br />
What is the most efficient way to do this? Regex? If so what would the regex be? <br />
<br />
Thanks!
</div>
</div>


I need to test if a variable is any one of the following:

botwsitecoredevcms
botw-web
accountopening
wuatlive
wuat2live
wuat3live
testlive1
testlive2
testlive3
testhoplive1
testhoplive2
testhoplive3
wwwstage
www
blog
mobile

What is the most efficient way to do this? Regex? If so what would the regex be? 

Thanks!

Most efficient JavaScript way to verify if variable matches any value in the list?

JavaScript is a dynamic, object-based language commonly used for client-side scripting in web browsers. Recently, server side JavaScript frameworks have also emerged. JavaScript runs on nearly every operating system and  in almost every mainstream web browser.

JavaScript

A regular expression ("regex") is a sequence of characters that define a search pattern, mainly for use in pattern matching with strings, or string matching, i.e. "find and replace"-like operations. Regular expression processors are found in several search engines, search and replace dialogs of several word processors and text editors, and in the command lines of text processing utilities, such as sed and AWK. Many programming languages provide regular expression capabilities, some built-in, for example Perl, JavaScript, Ruby, AWK, and Tcl, and others via a standard library, for example .NET languages, Java, Python and C++ (since C++11). Most other languages offer regular expressions via a library.