See bottom of question for an update, based on comments/answers: This question is really about the possibility of hidden threads that do not execute callbacks.    I have a question about a potential arcane scenario involving the Node Request module i...
Lets asume I have a code like the following:  var shared = 100; function workWithIt(){     shared += 100; }  setTimeout(workWithIt, 500); setTimeout(workWithIt, 500);   Ideally, this piece of code should add 200 to the variable shared, which is 300 a...
Here's the scenario:  My users are presented a grid, basically, a stripped down version of a spreadsheet.  There are textboxes in each row in the grid.  When they change a value in a textbox, I'm performing validation on their input, updating...
Greetings,  I've been studying javascript, nodejs.  And I don't understand how the concurrency issues are avoided in javascript.  Lets say I'm working on a object   var bigObject = new BigObject();   and I have a setTimer(function(){ work...
I have below code in my express server (have cut it down for brevity). I have a common object which I'm adding/modifying/reading in three different restful end points. Since all http requests in nodejs are asynchronous, I could get both put and g...
Buckle in, this may be a longer ride than expected...  Note: all listeners are delegated to the 'body' and all triggered events are on the 'body' as well.  Intended On-Page-Load Flow   Create selector with id #selectorA Register liste...
The Problem:  Multiple children of a component are having events triggered near simultaneously.  Each of these events are handled by handleChange style functions which use React's immutability helpers to merge complex objects into the state of th...
The code below is causing a race condition when it is checked with ESLint:    let match = false    try {     match = await something()   } catch (err) {     // do something   }   if (match === false) {     // do something   }   What is the better way...
This question is carefully distilled version of not asynchronous function executed as jQuery Deferred.  We have 2 jsfiddles:   http://jsfiddle.net/XSDVX/1/ - here the progress event is not fired, despite calling notify() function. http://jsfiddle.net...
Is it possible to have user code executed between a promise resolution and a promise await return?  function a () {   return new Promise(resolve => {     setTimeout(() => {       // Between here...       resolve()     }, 1000))   } }  async fun...

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