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i feel like im trying to do something super simple, but just being stupid about it.
all i want to do is see if a variable has been set previously, and if it has NOT, set it with a default value....here is a sample:
if(!embed_BackgroundColor) { var embed_BackgroundColor; embed_BackgroundColor = "#F4F4F4"; } so, once you stop laughing at my code....WHY is it overwriting the variable no matter what?
please save my nerves;)
989
In computer programs, variables are often declared without a value. The value can be something that has to be calculated, or something that will be provided later, like user input. A variable declared without a value will have the value undefined .
Method 1: Using the typeof operator The typeof operator returns the type of the variable on which it is called as a string. The return string for any object that does not exist is “undefined”. This can be used to check if an object exists or not, as a non-existing object will always return “undefined”.
This JavaScript exception variable is not defined occurs if there is a non-existent variable that is referenced somewhere. Cause of Error: There is a non-existent variable that is referenced somewhere in the script. That variable has to be declared, or make sure the variable is available in the current script or scope.
Pro style:
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