Want to improve this post? Provide detailed answers to...

Is there a way to retain the name of a destructured function argument? I.e., the name of the root object?  In ES5, I might do this (using inheritance as a metaphor to make the point):  // ES5: var setupParentClass5 = function(options) {     textEdi...

Can I call a function with array of arguments in a convenient way in JavaScript?  Example:  var fn = function() {     console.log(arguments); }  var args = [1,2,3];  fn(args);   I need arguments to be [1,2,3], just like my array....

I'm browsing the discussion for a similar topic, but can't find my situation...  Am trying call parent constructors with parameters... can't seem to get it right.  I have a PhysicsBody superclass that takes aNode as its only constructor a...

I have an EventListener that listens to the entire document and records keystrokes, but I want to remove this Listener when certain conditions are met.   The following is a snippet of my code:  document.addEventListener('keyup', function(e) {...

In some languages you can set default values for function's arguments:  function Foo(arg1 = 50, arg2 = 'default') {     //... }   How do you do it in JavaScript?...

This question already has answers here:...

There's an old trick (that I learned on SO) to catch calling a constructor as a function, i.e. forgetting the new keyword. The following, or something like, it goes in each constructor at the top.  if (!(this instanceof arguments.callee)) {     t...

I wanted to have an optional boolean parameter to a function call:  function test() {   if (typeof(arguments[0]) === 'boolean') {     // do some stuff   }   // rest of function }   I want the rest of the function to only see the arguments arr...

I can't pass arguments to function passed to page.evaluate. I am trying to submit form.  data1 = "Textsample"; page.evaluate(function(data1) {     var form = document.getElementById ("MyForm");     form.data.value = data1;     for...