When is null or undefined used in JavaScript?
40674
What is the difference between null and undefined in JavaScript?
24249
When is the Killing form null?
132708
Function returning Null along with other unexpected expressions
2772
Is there a "null coalescing" operator in JavaScript?
7169
JavaScript OR (||) variable assignment explanation
15097
Is there any difference between IS NULL and =NULL
101128
What is "?:" notation in JavaScript?
62074
Which is more effective: if (null == variable) or if (variable == null)?
79162
Javascript null or empty string does not work
151813
What does "javascript:void(0)" mean?
125415
Why is undefined == undefined but NaN != NaN?
134996
How can I temporarily disable the "return value might be undefined" warning?
72088
Why shouldn't we allow NULLs?
144673
Why does this JavaScript code print "undefined" on the console?
127452
Why is typeof null "object"?
54143
Why is the default value of the string type null instead of an empty string?
38780
Checking for null before ToString()