Abstract: A method includes: displaying a graphical user interface (GUI) comprising one or more input elements to control a display of a variation of a web page on a client device, the input elements to configure a plurality of conditions and a trigger event defining when to evaluate the plurality of conditions for the web page; responsive to a user interaction, via the GUI, with the input elements, generating a set of instructions corresponding to the web page, the set of instructions comprising one or more of the plurality of conditions and the trigger event and specifying the variation of the web page to display at the client device responsive to the one or more of the plurality of conditions being met when the trigger event occurs; and transmitting the set of instructions to the client device responsive to an access of the web page by the client device.

Abstract: A single-page application of a content provider is associated with a smart page established on an experiment system to allow a variation test to be performed on the single-page application. The smart page is associated with a trigger that determines when one or more corresponding conditions of the single-page application should be evaluated. Responsive to one or more of the conditions of the single-page application being satisfied, either an original version of the single-page web page or a variant of the single-page web page may be displayed.

Abstract: A method of avoiding infinite loops of changes to a dynamic web page to display on a client device includes displaying the dynamic web page received from a content provider on the client device, wherein the dynamic web page comprises a modified element having an original modification. The method further includes receiving an indication that the modified element was updated to generate an updated modified element. The method further includes, in response to receiving the indication, determining, by a processing device, that reapplying the original modification to the updated modified element would result in an infinite loop on the dynamic web page. The method further includes, based on the determination, displaying the updated modified element on the dynamic without reapplying the original modification to the updated modified element.

Abstract: A method of avoiding infinite loops of changes to a dynamic web page to display on a client device includes displaying the dynamic web page received from a content provider on the client device, wherein the dynamic web page comprises a modified element having an original modification. The method further includes receiving an indication that the modified element was updated to generate an updated modified element. The method further includes, in response to receiving the indication, determining, by a processing device, that reapplying the original modification to the updated modified element would result in an infinite loop on the dynamic web page. The method further includes, based on the determination, displaying the updated modified element on the dynamic without reapplying the original modification to the updated modified element.

Abstract: A single-page application of a content provider is associated with a smart page established on an experiment system to allow a variation test to be performed on the single-page application. The smart page is associated with a trigger that determines when one or more corresponding conditions of the single-page application should be evaluated. Responsive to one or more of the conditions of the single-page application being satisfied, either an original version of the single-page web page or a variant of the single-page web page may be displayed.