Yes, CONDITIONS in rules can limit the page.

No need.Clearvars are generally used when the data element is none, and you need to actively clear it to avoid using the previous value, so generally do not choose the type of none when setting the data element.Qualitrics uses global variables, which can be placed in the same rule, and Actions can b...

Indeed, if the official can default a development environment.

Republish, in order to make the library code take effect as soon as possible, you can open the library code through a browser, and then refresh it, so that it will be the latest republished. 

It is recommended that you use data elements, and then you can reference them repeatedly without worrying about typing errors.  

If all data can be collected normally, it can be replaced with launch.

25 Various Rule Event Types and Condition Types | BCS