a read-only boolean flag indicating whether a strict mode is enabled for Webix library
if(webix.env.strict)
//your code
In Strict mode Webix doesn't use "eval".
Strict mode can be enabled by defining a "webix_strict" global variable before Webix files are included into the page:
<script> window.webix_strict = true;
</script>
<script src="../webix.js" type="text/javascript"></script>
<link rel="stylesheet" href="../webix.css" type="text/css">
Note that datatable math won't work with the strict mode enabled.