Custom tag used for templating crashes the syntax highlight of my html code

Hello everybody,

as this is my first post I wish to thank ya' all for the great job that you're doing on this forum! phpStorm is a wonderfull tool, but its community is even greater!

So, here comes my problem. I'm using some template engine in javascript that requires the variables that are to be interpolated to be enclosed between <% %>. So for example I could write something like:

<li><%= var_name  %></li>

The problem is that as soon as I type the <% part into my code, all the code that follows until end of file gets unrecognized. Bellow you can see such an example:

As I'm using quite a lot this template engine, it really bothes me.

Does anybody  have an idea about how overcome this issue?