What is the scope of variables in javascript? Do they have the same scope inside as opposed to outside a function? Or does it even matter? Also, where are the variables stored if they are defined globally?...

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What is the difference between using call and apply to invoke a function?  var func = function() {   alert('hello!'); };   func.apply(); vs func.call();  Are there performance differences between the two aforementioned methods? When is it b...

We have two different way for doing function expression in JavaScript:  Named function expression (NFE):   var boo = function boo () {   alert(1); };   Anonymous function expression:  var boo = function () {   alert(1); };   And both of them can be...

I have a function callWithMagic which takes a callback function as a parameter and calls it with one argument.  const callWithMagic = callback => {   const magic = getMagic();   callback(magic); };   I also have a function processMagic which tak...

I recently updated jQuery from 1.8 to 2.1. I suddenly discovered that the .live() stops working. I get the error TypeError: $(...).live is not a function.  Is there any method I can use in place of .live()?...

What is the simplest/cleanest way to implement singleton pattern in JavaScript?...

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How do I pass a function as a parameter without the function executing in the "parent" function or using eval()? (Since I've read that it's insecure.)  I have this:  addContact(entityId, refreshContactList());   It works, but the pr...

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