What is the attribute of the input tag?

Noticed the tags input here such attribute kl_virtual_keyboard_secure_input="on". Someone knows whose it is hands business?
September 19th 19 at 12:17
2 answers
September 19th 19 at 12:19
this attribute was invented by the developer. Yes, it violates the purity code, but if the page is a DOCTYPE - XHTML or HTML5, then create your own attributes for tags are acceptable.
Most likely the developer added this helper attribute to pass to the script some properties of the given input. Judging by the title attribute, the page uses a Virtual keyboard is a window that POPs up when focusing in this field. In this window, the set of all beech - if, for example, people with disabilities or does not have a keyboard with the Cyrillic alphabet.
September 19th 19 at 12:21
You probably have installed Kaspersky anti-virus new version of Kaspersky install "protective" plug-in browser, which adds similar attributes.

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