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The typeof operator returns object for both objects, arrays, and null.
The typeof operator does not return object for functions.
document.getElementById("demo").innerHTML =
typeof {name:'john', age:34} + "<br>" +
typeof [1,2,3,4] + "<br>" +
typeof null + "<br>" +
typeof function myFunc(){};
The typeof operator returns "object" for arrays because in JavaScript arrays are objects.