Sniberb•2y ago

⛄Snowberb⛄ – 10-12 May 18

Why doesnt the try catch finally of this code respect the awaits, but if it is inside the (async () => {})() it does? I dont understand the syntax here

 try {
        (async () => {
          if (!...) {
            const ... = await ...;
            ...
            return;
          }
          await ...
        })();
} catch (e) {} finally {}

 try {
        (async () => {
          if (!...) {
            const ... = await ...;
            ...
            return;
          }
          await ...
        })();
} catch (e) {} finally {}

8 Replies

Sniberb•2y ago

The above doesnt work, but this does:

     (async () => {
        try {
          if (!...) {
            const ... = await ...;
            ...
            return;
          }
          await ...
         } catch (e) {} finally {}
     })();

     (async () => {
        try {
          if (!...) {
            const ... = await ...;
            ...
            return;
          }
          await ...
         } catch (e) {} finally {}
     })();

Eva•2y ago

Because you don't catch unawaited async functions

try {
        await (async () => {
          if (!...) {
            const ... = await ...;
            ...
            return;
          }
          await ...
        })();
} catch (e) {} finally {}

try {
        await (async () => {
          if (!...) {
            const ... = await ...;
            ...
            return;
          }
          await ...
        })();
} catch (e) {} finally {}

would work if IIFE throws something, you'd need another try catch inside of function to catch calls inside of it, obviously

Unknown User•2y ago

Message Not Public

Sniberb•2y ago

didnt understand

Eva•2y ago

first piece of code you sent can be simplified to

try {
  asyncFunction();
catch (e) {} finally {}

try {
  asyncFunction();
catch (e) {} finally {}

you don't await async function so if it throws you don't catch anything

Sniberb•2y ago

Eva•2y ago

and it won't recursively catch anything within that function as well

reactibot•2y ago

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