Experience Builder - building expressions

[HelenCooper]

Hi, 

I'm trying to use a button to link to a URL and pass a value from a data source.  I'm struggling to find any documentation on how to do this, and my random guesses at how to build the expression are not fruitful!

Could anyone point me in the right direction?

Many thanks, 

Helen

[KevinDonahue3]

Hi Helen,

I'm working with a button in a list and trying to pass through a dynamic expression that will open another page and select a feature on the map and engage a couple of filters based on the ID of the list item.  I've got all the expressions figured out, but I need to add in an additional filter in the middle now. 

Unfortunately to do that, the expression window won't let me split a string and add in another dynamic component.  So far the only solution I've found is to just retype everything that comes after the new filter.  It works, but it's tedious.