GoliatOne

JavaScript: RegExp to match content between HTML comments.

I'm sure you are familiar with the following quote:

Some people, when confronted with a problem, think “I know, I'll use regular expressions.” Now they have two problems.

And, if you have not read about Cthulhu's coming on this StackOverflow post, then go on, I'll wait for you.

Hey, I'm glad you are back.

We want to get the HTML between two comment tags:

<!DOCTYPE html>
<html>
<head>
   <meta charset="utf-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <!--gconfig-->
    <meta name="platform:ip" content="10.0.2.135">
    <meta name="platform:port" content="9000">
    <meta name="platform:endpoint" content="ws/cs/exhibit">
    <meta name="platform:clientid" content="wits">
    <meta name="platform:exhibitid" content="WhatIsTheSenate">
    <meta name="app:endpoint" content="ws://{{ip}}:{{port}}/{{endpoint}}/{{clientid}}/{{exhibitid}}">
    <!--@gconfig-->
</head>
<body>
</body>
</html>

var tag = 'gconfig',
    end = '@gconfig',
    matcher = new RegExp('<!--\\s*'+tag+'\\s*-->([\\s\\S]*?)<!--\\s*'+end+'\\s*-->', 'igm'),
    head = $('head').html();

console.log(matcher.exec(head));

["<!--gconfig-->
    <meta name="platform:ip" content="10.0.2.135">
    <meta name="platform:port" content="9000">
    <meta name="platform:endpoint" content="ws/cs/exhibit">
    <meta name="platform:clientid" content="wits">
    <meta name="platform:exhibitid" content="WhatIsTheSenate">
    <meta name="app:endpoint" content="ws://{{ip}}:{{port}}/{{endpoint}}/{{clientid}}/{{exhibitid}}">
    <!--@gconfig-->", "
    <meta name="platform:ip" content="10.0.2.135">
    <meta name="platform:port" content="9000">
    <meta name="platform:endpoint" content="ws/cs/exhibit">
    <meta name="platform:clientid" content="wits">
    <meta name="platform:exhibitid" content="WhatIsTheSenate">
    <meta name="app:endpoint" content="ws://{{ip}}:{{port}}/{{endpoint}}/{{clientid}}/{{exhibitid}}">
    "]

JavaScript Regexp Match Content Between Html Comments

JavaScript: RegExp to match content between HTML comments.