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Is
return false the same as:
return 
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1 : an incorrect report false returns on an income-tax blank. 2 : an untrue return made to a legal process by the officer to whom it was delivered for execution.
Using return causes your code to short-circuit and stop executing immediately. The first return statement immediately stops execution of our function and causes our function to return true . The code on line three: return false; is never executed.
You use return false to prevent something from happening. So if you have a script running on submit then return false will prevent the submit from working.
The return True ends the function's execution and returns the boolean True. Similarly return False ends the function's execution and returns the boolean False. If you don't have a return statement then when the function exits it returns None.
No.
var i = (function() { return; })();
i === undefined which means that i == false && i == '' && i == null && i == 0 && !i
var j = (function() { return false; })();
j === false which means that j == false && j == '' && j == null && j == 0 && !j
Weak operators in JS make it seem like the might return the same thing, but they return objects of different types.
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