Match line breaks with regex in JavaScript

I googled this and looked on here and none of the answers seem to match the right thing for me. They seem to mostly return null. I'm trying to search a CSS files with it with a CSS block like:

.twitterfeed p {
    background: #fff;
    border-radius: 15px;
    color: #373737;
    font-size: 15px;
    margin: 0 10px 20px 10px;
    -moz-border-radius: 开发者_如何学编程15px;
    padding: 13px;
    position: relative;
    -webkit-border-radius: 15px
}

I didn't make the CSS file or anything so I don't know whats in it and I dont know if there will be new lines or single liners like: body { background:color; }

How can I match that entire block, but not other blocks? So, from something { }?

---

var str = '.twitterfeed p {\
    background: #fff;\
    border-radius: 15px;\
    color: #373737;\
    font-size: 15px;\
    margin: 0 10px 20px 10px;\
    -moz-border-radius: 15px;\
    padding: 13px;\
    position: relative;\
    -webkit-border-radius: 15px\
}';

var matches = str.match(/([^{]+\{[^}]+\})/g);

Here is a demo

---

You have to use something like

{[\S\s]*?}

Because Javascript does not know the dotall modifier s to make the . matches newlines you have to search for [\S\s]* that means match a nonwhitespace character (\S) or a whitespace character (\s) zero or many times.

I made it a non greedy match *? to avoid matching the last }

See it here online on Regexr

---

/\w+\s*{[^}]+}/

Finds simple CSS blocks when I try it on a multiline string. You'd have to add some characters to the capture group on the front of it to represent all of the possible tags and selector flags, though.

/[\w\*\.#>@ \t]+\s*{[^}]+}/

Might work for most tags but it's off the top of my head and I might be missing some flags.

More about the limitations of the JS regular expression language, if you're interested http://www.regular-expressions.info/javascript.html

---

If you just want what's between the curly brackets:

var m = myCssFileString.match(/\{[^\}]+\}/m);

The match will include the brackets - you can easily substring and trim to get just the defined styles.