I want to throw some things in my JS code and I want them to be instanceof Error, but I also want to have them be something else.  In Python, typically, one would subclass Exception.    What's the appropriate thing to do in JS?...
I would like to know why the follow code doesn't work in the Google Chrome:  // creates a xss console log  var cl = ( typeof( console ) != 'undefined' ) ? console.log : alert; cl('teste');   output: Uncaught TypeError: Illegal i...
For some reason it looks like constructor delegation doesn't work in the following snippet:  function NotImplementedError() {    Error.apply(this, arguments);  } NotImplementedError.prototype = new Error();  var nie = new NotImplementedError(&#...
Is there a way to catch exceptions in JavaScript callbacks? Is it even possible?  Uncaught Error: Invalid value for property <address>   Here is the jsfiddle: http://jsfiddle.net/kjy112/yQhhy/  try {     // this will cause an exception in goo...
Can I define a custom types for user-defined exceptions in JavaScript?  If so, how would I do it?...
For some reason this code gives me an uncaught exception error. It seems the catch block is not catching the error. Are try catch blocks scoped in such a way that I cannot throw an error in a nested function, and then expect it to be caught by a catc...
In IE and Chrome, typing this into the JavaScript console throws an exception:  {} == false   // "SyntaxError: Unexpected token =="   However, all of these statements are evaluated with no problem:  false == {}   // false  ({} == false) // fa...
Is there any way to globally catch all exceptions including Promise exceptions. Example:      window.onerror = function myErrorHandler(errorMsg, url, lineNumber) {         alert("Error occured: " + errorMsg);//or any message         return fa...
Douglas Crockford recommends doing something like this:  throw {     name: "System Error",     message: "Something horrible happened." };   But you could also do something like this:  function IllegalArgumentException(message) {     t...
w3schools says that exceptions can be strings, integers, booleans, or objects, but the example given doesn't strike me as good practice, since exception type checking is done through string comparison. Is this the preferred method of exception ha...

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