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So i have been struggeling to use highlight.js in a text area since obviously this doesn't work:
<!DOCTYPE html>
<html>
<head>
<title>Hello World</title>
<link rel="stylesheet" href="styles/default.css">
<script src="highlight.pack.js"></script>
<script>hljs.initHighlightingOnLoad();</script>
</head>
<body>
<form>
JavaScript Injection: <br>
<pre>
<code>
<textarea name="js_execute" cols="50" rows="10" "></textarea>
</code>
</pre>
<input type="button" name="Inject_Execute_Button" value = "Inject" onclick="executeJS()" >
</form>
<script type="text/javascript">
function executeJS()
{
alert("Wohoo");
}
</script>
<style type ="text/css">
</style>
</body>
</html>
I'm pretty sure there's an easy answer to this so i won't explain it in too detail but at the end i would prefer to have code typed into the textarea highlighted in JavaScript.
372
You can't actually highlight text in a <textarea> . Any markup you would add to do so would simply display as plain text within the <textarea> . The good news is, with some carefully crafted CSS and JavaScript, you can fake it.
There are many built-in functions in mark. js but we are using two functions for our requirement that is mark() and unmark() function respectively. Here mark() is used to highlight the search text and unmark() is used to remove highlighting the text that is highlighted before.
For selecting the content of an input (with highlight), use: el. select() .
Highlight using the HTML5 <mark> tag If you are working on an HTML5 page, the <mark> tag can quickly highlight text. Below is an example of the how to use the mark tag and its result. If your browser supports the <mark> tag, "highlighted text" should have a yellow background.
You might want to look at http://ace.c9.io/, which does syntax highlighting, but is specifically aimed at editing.
Note however that it does not use textarea either, probably for the same reasons mentioned by @isagalaev.
124
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