work

8-async/03-promise-chaining/01-then-vs-catch/solution.md

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+The short answer is: **no, they are not**:
+
+The difference is that if an error happens in `f1`, then it is handled by `.catch` here:
+
+```js run
+promise.then(f1).catch(f2);
+```
+
+...But not here:
+
+```js run
+promise.then(f1, f2);
+```
+
+That's because an error/result is passed down the chain, and in the second code piece there's no chain below.

8-async/03-promise-chaining/01-then-vs-catch/task.md

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+# Promise then vs catch
+
+Are these code fragments equal? In other words, do they behave the same way in any circumstances, for any handler functions?
+
+```js
+promise.then(f1, f2);
+```
+
+Versus;
+```js
+promise.then(f1).catch(f2);
+```