Perhaps I misunderstood how catching errors with async/await is supposed to work from things articles like this https://jakearchibald.com/2014/es7-async-functions/ and this http://pouchdb.com/2015/03/05/taming-the-async-beast-with-es7.html, but my...
How can Javascript duplicate the four-part try-catch-else-finally execution model that other languages support?  A clear, brief summary is from the Python 2.5 what's new. In Javascript terms:  // XXX THIS EXAMPLE IS A SYNTAX ERROR try {   // Prot...
When I'm developing normal web application with JavaScript, the try/catch statement is not needed usually. There's no checked exception, File IO or database connection in JavaScript.   Is try/catch statement useful in JavaScript? When can I u...
I would like to use the window.history.pushState() function in supporting browsers. Unfortunately I'm getting an error on Firefox:     TypeError: history.pushState is not a function   How is it possible to avoid that?...
I'm trying to understand why I'm getting the following error, not how to work around it.  Passing the following code to JSLint or JSHint yields the error 'err' is already defined.  /*jslint white: true, devel: true, onevar: true, brow...
I have this try and catch problem. I am trying to redirect to a different page. But sometimes it does and some times it doesnt. I think the problem is in try and catch . can someone help me understand this. Thanks  var pg = new Object(); var da = doc...
The javascript, when run through JSLint yells at me and I am not sure why.  /*jslint browser: true, devel: true, evil: true, undef: true, nomen: true, eqeqeq: true, plusplus: true, bitwise: true, newcap: true, immed: true */  var foo = function() {...
So I am using the JavaScript implementation of Selenium, WebDriverJS. As with any web browser automation the biggest hurdle is getting the code slow down long enough for page elements to load. My solution is this:  for each element I want to interact...
In JavaScript is it wrong to use a try-catch block and ignore the error rather than test many attributes in the block for null?  try{     if(myInfo.person.name == newInfo.person.name       && myInfo.person.address.street == newInfo.person.add...
I have quite a complex express route in my node.js server, that makes many modifications to the database via mongoose.  My goal is to implement a mechanism, that reverts all changes when any error occurs. My idea was implementing functions for undoin...

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