Question

I use Aptana Studio to code JavaScript.

When I write string with </, there will be warning saying

‘<‘ + ‘/’ + letter not allowed here

But it does not trigger error in browsers.

what does </ mean in JavaScript?

Answer 1

For inline scripts (e.g, using <script>), some HTML parsers may interpret anything that looks like </this (especially </script>) as an HTML tag, rather than part of your source code. Your IDE is trying to keep you from typing this by mistake.

This means that, if you’re using an inline script, you can’t have a </tag> as a constant string in JavaScript:

var endTag = "</tag>"; // don't do this!

You’ll need to break it up somehow to keep it from being interpreted as a tag:

var endTag = "<" + "/tag>";

Note that this only applies to inline scripts. Standalone scripts (e.g, a .js file) can have anything they want in them.