Validator and Mustache-templating

Hello,
I use a mustache (a template system https://mustache.github.io/) in
programming, that is available in php, javascript and many other languages.
Using an javascript-mustache within php-mustache:
<div id="tpl_one">
	{{=<% %>=}}
	<div id="theid">
		<img src="{{{URL}}}/public/img/loading.gif" id="theloading"
style="width:20px;height:20px;display: none" alt="loading" />
	</div>
	<%={{ }}=%>
</div>
I get erors in such places that is not needed: 

<<<
Error: Bad value {{{URL}}}/public/img/loading.gif for attribute src on 
element img: Illegal character in path segment: { is not allowed.
 From line 305, column 3; to line 306, column 61
>>>

Thank you

Received on Wednesday, 17 January 2018 19:34:37 UTC