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adds style classes for the component

css?: string;


var popup = new dhx.Popup({    css:"my_first_class my_second_class"});;

Related sample: Popup. Custom Css

Note, that the DHTMLX library provides a set of own CSS classes that you can also apply to change the appearance of Popup.

var popup = new dhx.Popup({    css: "dhx_widget--bg_white"});