Can anyone explain why this pattern doesn't work? Or point me to some resource?
function myApiFunc(callback)
{
/*
* This pattern does NOT work!
*/
try {
doSomeAsynchronousOperation(function (err) {
if (err)
throw (err);
/* continue as normal */
});
} catch (ex) {
callback(ex);
}
}
Try/catch is not async and exceptions do not bubble up through the async context, which makes sense as the caller moved on with execution. Try this in your console:
try {
console.log("see, ");
setTimeout(() => {throw new Error("oops")}, 100);
console.log(
"I can't assume here that"
+ " the prev. line succeeded"
);
} catch(e) {
console.log("error!");
}
