Expecting undefined in Javascript
1054
How do JavaScript closures work?
148812
Using 'return' instead of 'else' in JavaScript
90509
Does JavaScript have "Short-circuit" evaluation?
31518
What is the (function() { } )() construct in JavaScript?
83782
How to check a not-defined variable in JavaScript
576
How can I check for an empty/undefined/null string in JavaScript?
94151
What does javascript function return in the absence of a return statement?
135175
What is the 'new' keyword in JavaScript?
134603
Why doesn't a Javascript return statement work when the return value is on a new line?
68074
JavaScript 'in' operator for `undefined` elements in Arrays
142624
Code with undefined behavior in C#
48991
How does this JavaScript/jQuery syntax work: (function( window, undefined ) { })(window)?
22122
How do you use the ? : (conditional) operator in JavaScript?
92587
Surprised that global variable has undefined value in JavaScript
20165
How to initialize var?
125415
Why is undefined == undefined but NaN != NaN?
144673
Why does this JavaScript code print "undefined" on the console?