Check References To External Scripts
This option specifies whether the availability and correctness of references to external client scripts (such as jQuery, jQuery UI, Knockout, etc.), which are used by certain DevExpress web controls, are checked.
<configuration> ... <devExpress> ... <settings checkReferencesToExternalScripts="true" /> ... </devExpress> ... </configuration>
You should register the DevExpress Web.config section to apply these settings to your project.
Starting with v17.1, this option is enabled by default.