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Alex Rivera
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If I know the variable will be object later, I use: var obj; but it doesn't really matter if I initialize it as null or undefined: var obj = null; or var obj = undefined; For strings I personally use: var str = ''; as later on I can do str += 'some text'; and if I use null for example I get "nullsome text". null, undefined, empty string or 0 are all falsy values so to check if they are defined. which is the correct way to initialize variables if my variable will be used as object, dom node, etc .. ?
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