javascript - Regular Expression to match open and closed html tags

I want to come up with Regular Expression to return true if the a
closed html tag is matched with an open one in specific text that gets passed in
JavaScript. If there is an unmatched tag, it should return
false;

For example, if the following text is
passed "

Test

" it should return true

but if the following text gets passed
"

Test

Boom" it should return
false

I can only get it to match the first div
tags to return true with the following
expression

 var text =
            "
Test
; 

 var text2 =
            "
Test
; 
 var regex =
            /[^<>]*<(\w+)(?:(?:\s+\w+(?:\s*=\s*(?:".*?"|'.*?'|[^'">\s]+))?)+\s*|\s*)>[^<>]*<\/\1+\s*>[^<>]*|[^<>]*<\w+(?:(?:\s+\w+(?:\s*=\s*(?:".*?"|'.*?'|[^'">\s]+))?)+\s*|\s*)\/>[^<>]*||^[^<>]+$/;

            var match = regex.test(text);
 console.log(match); // true
 var
            match = regex.test(text2);
 console.log(match2); // still true should be
            false

How can I fix it
so it functions the way I want it to.

class="post-text" itemprop="text">

class="normal">Answer

The test
method returns true for match2 because it has
found a match.

In order to fix
it, change your regex this way:

^(?:<(\w+)(?:(?:\s+\w+(?:\s*=\s*(?:".*?"|'.*?'|[^'">\s]+))?)+\s*|\s*)>[^<>]*<\/\1+\s*>|<\w+(?:(?:\s+\w+(?:\s*=\s*(?:".*?"|'.*?'|[^'">\s]+))?)+\s*|\s*)\/>||[^<>]+)*$

Description
(click to enlarge)

href="https://www.debuggex.com/i/6gy-t3B7subnWrvp.png"
rel="nofollow">

src="https://www.debuggex.com/i/6gy-t3B7subnWrvp.png" alt="Regular expression
visualization">

Demo

href="http://jsfiddle.net/r2LsN/"
rel="nofollow">http://jsfiddle.net/r2LsN/

Discussion

The
regex defines all the allowed patterns
firstly:

1. Tags
   with body:
   ...


2. Tags
   without body: (here we can find zero or more
   spaced before /)


3. Comments
   


4. Any text that
   is not < or
   >.

then
these patterns can appear zero or more times between the beginning and the end of the
tested string:
^(?:pattern1|pattern2|pattern3|pattern4)*$.