What is the difference between Event Loop and Callback function in node.js?
Event loop vs Callback function in node.js
1.8k Views Asked by imnirav At
1
There are 1 best solutions below
Related Questions in NODE.JS
- How to solve CERT_UNTRUSTED error in nodemailer
- Run a loop over a callback, node js
- Implementing prerender.io middleware in sails.js
- Token based authorization in nodejs/ExpressJs and Angular(Single Page Application)
- formatting path string in javascript
- One to One screensharing using WEBRTC
- Create polygon from grid (for collisions)
- Strange npm behavior when installing packages like grunt
- Convert JSON.gz to JSON in node js
- "Your npm version is outdated." but it's not. While install yo
- Why put methods on the prototype of a class instead of declaring them in the constructor?
- Node JS Async Response
- mongoose get property from nested schema after `group`
- Cannot Receive Incoming call on Twilio android Client
- How can I change a specific line in a file with node js?
Related Questions in CALLBACK
- Change setInterval value dynamically
- Pass Data between two view controllers using 'Delegation' : Objective-C
- I'm trying to make the "merge function" work by writing a Callback.
- Can ajaxSetup.success callback prevent ajax.complete callback from being called?
- Passing a callback function in options object to other function
- Nested asynchronous calls using AngularJS
- callback google play on installed app
- Defining Callbacks for custom Javascript Functions
- Passing function name as callback doesn't work as expected in my class
- What is the purpose of javax.security.auth.callback.*?
- Querying DynamoDB with Lambda does nothing
- Android version of NSNotificationCenter (event binding)
- async js callback for each upload
- Does django server support url callbacks (webhooks)?
- How to update label from callback function in code behind?
Related Questions in EVENT-LOOP
- nodejs mysql query blocking event loop
- Do I need to use queue for uploading file to Amazon S3 from my Node.js Server?
- Is setInterval blocking?
- Event loop vs Callback function in node.js
- How to read Unicode codepoints from an unbuffered file in a mio event loop?
- node.js - Is there a single event loop for the entire Node runtime?
- Ember acceptance test andThen() doesn't wait until scroll events are complete
- Two independent async loops in Python
- Tracking Python program flow in smoke test
- Single thread application qt slot executes in which thread
- What happens to event queue when a node server throws exception
- Event loop blocking and async programming in Node JS
- Can you define the task priority?
- How can I integrate new Qt windows with an existing X application?
- QPushButton in QStackedWidget in QDialog
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
Event Loop is in the underlying system that execute your program. Every time your code needs to access an external resource (for example a XHR call to an api) you usually do something like that:
The runtime execute the call and pass the callback function (second parameter of the callToTheApi function) to the Event Queue. This means 'Execute the call to the api and when the api has done please tell me and go on with the call back'. The event loop while the api are doing their job put in execution some other piece of code and resume the callback once the api has done.
You can find a good explanation here: Understanding the Node.js Event Loop