10-try-catch

Author: MayaGans

promises.tex

@@ -326,7 +326,13 @@ \section{Promises}\label{s:promises-promises}
 
 \noindent
 then the error message won't appear
-because the call to \texttt{fetch} doesn't raise an exception right away.
+because the function \texttt{fetch} is asynchronous. 
+
+There are two passes of execution in this block:
+The first is the \texttt{try...catch} event loop,
+and the second is \texttt{fetch}.
+JavaScript rips the asynchronous code right out of the execution context!
+There's no error, because \texttt{fetch} never got the chance to run.
 
 Going back to the \texttt{fs-extra.stat} example above,
 what if we want to process multiple files,