javascript - How to catch errors in synchronous functions in node.js? - Stack Overflow

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In asynchronous functions, we can simply catch the error in callback. For example :

Async func:

fs.readdir(path, function(err){
    //catch error
)

As synchronous functions don't have callback, how can I catch errors?

Sync func:

fs.readdirSync(path);           //throws some error

One way is to use try catch block:

try{
    fs.readdirSync(path);
}
catch(err){
    //do whatever with error
}

Is there any other way to do that? If yes, then which one is better?

In asynchronous functions, we can simply catch the error in callback. For example :

Async func:

fs.readdir(path, function(err){
    //catch error
)

As synchronous functions don't have callback, how can I catch errors?

Sync func:

fs.readdirSync(path);           //throws some error

One way is to use try catch block:

try{
    fs.readdirSync(path);
}
catch(err){
    //do whatever with error
}

Is there any other way to do that? If yes, then which one is better?

• javascript
• node.js
• asynchronous
• synchronization

Share Improve this question Follow asked May 21, 2015 at 7:36 manishmanish 95622 gold badges1212 silver badges3535 bronze badges 2

• 3 try...catch is the synchronous way. – elclanrs Commented May 21, 2015 at 7:38
• 1 for synchronous try ... catch is the way to handle exception – Manmay Commented May 21, 2015 at 7:43

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1 Answer 1

Sorted by: Reset to default 7

Is there any other way to do that?

No, that's how you do it. Typically you have all your main logic in the try, and then just handle exceptional conditions (errors) in the catch. (And cleanup in the finally.)

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