Check if object exists in JavaScript

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抹茶落季
抹茶落季 2020-12-04 05:26

How do I verify the existence of an object in JavaScript?

The following works:

if (!null)
   alert(\"GOT HERE\");

But this throws a

18条回答
  •  囚心锁ツ
    2020-12-04 05:40

    Think it's easiest like this

    if(myobject_or_myvar)
        alert('it exists');
    else
       alert("what the hell you'll talking about");
    

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