After running the following code snippet, I observed that "typeof object[key]" is displaying as a number while "typeof object.key" is showing undefined. Can anyone explain why this unusual behavior is occurring?
var object = {a:3,b:4};
for (var key in object){
console.log(typeof object[key], typeof object.key);
}
As your loop runs, the variable key will first be "x" and then "y".
When using bracket notation, key represents the name of a local variable that is being evaluated.
Therefore, when you access object[key], you are essentially getting object["x"] followed by object["y"].
Conversely, with dot notation, you are specifically referencing the property named "key" itself. Since object does not have a property named "key", it returns as undefined.
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