Where does the extra space appear when inserting html code into the page?

Question

JavaScript

Hello.
Such a situation: I am writing a module for Bitrix (analogous to a plugin on wordpress) and ran into an incomprehensible situation
screenshot of the source code on wordpress: joxi.ru/VrwM1nxsOeoQv2 the
arrow shows where the problem will be.
screenshot of the Bitrix source code: joxi.ru/EA46E1YfwEXzMm
and now a space appeared from somewhere...????
this html code is generated on the server, loaded via ajax and inserted into the page and that's it.
But for some reason, on wordpress, he inserts it normally, but in Bitrix, he adds such a space ...
Does anyone know how this works?
The code on the server is generated without spaces, the space appears after $("#container").html(ajax.html) in Bitrix Thank you!
joxi.ru/82QqyMXTjx8Jq2

Answer 1

problem solved, missing htmlspecialchars()

Answer 2

You have something like this: and inside the tag some kind of garbage instead of arguments: And for screenshots - a minus in karma. <sometag data-options="{" >format":"dd-mm-yy