Question

149

rated 0 times [ 152] [ 3] / answers: 1 / hits: 105303 / 15 Years ago, thu, april 2, 2009, 12:00:00

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;)

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answered 15 Years ago soniap · Accepted Answer

if (typeof variable === 'undefined') {

    // variable is undefined

    // eg:

    // var variable = someValue;

}