I'm not familiar with ReactJS, sadly but I often use breakpoint debugging and IO (eg: print statements, drawing shapes, logging, etc.) to help get a feel for the common data flow quickly. This lets me make a hypothesis like "when I click on this button, does this line get hit?" or "does this series of functions get called?".
Sadly, I'm not 100% what that would look like in your situation.
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I'm not familiar with ReactJS, sadly but I often use breakpoint debugging and IO (eg: print statements, drawing shapes, logging, etc.) to help get a feel for the common data flow quickly. This lets me make a hypothesis like "when I click on this button, does this line get hit?" or "does this series of functions get called?".
Sadly, I'm not 100% what that would look like in your situation.