is ENOENT from fs.createReadStream uncatchable?

Question

I\'m not able to catch ENOENT of fs.createReadStream(). Is this an asynchronous function , which throws exception in a different closure-chain ?

$ node -v
v0.10         


        

Answer 1

fs.createReadStream is asynchronous with the event emitter style and does not throw exceptions (which only make sense for synchronous code). Instead it will emit an error event.

const fs = require('fs')

const stream = fs.createReadStream('foo');
stream.on('error', function (error) {console.log("Caught", error);});
stream.on('ready', function () {stream.read();});