RegEx: How Can I match whitespace except HTML code in JS

Question

I just have a question.

Using Regex in JS, How can I match whitespace except HTML tag? I mean there are many whitespace, but I don't want whitecpase in HTML tag.

Here is example HTML Code.

<b>Welcome to StackOverflow</b>
<br></br>
<br></br>

<b>Hello</b><em>Friends</em>

<asdfasd>Thanks for looking at this regex</asdfsadfsd>

expected result: I want to match this blue background

I use this regex code.

/>([^<]*)

but I don't know how can I match a whitespace.

Link for test: http://regexr.com/3e07o

Please explain me.