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Tolerim
25 days ago

Why is {undefined} considered undefined while {null} is null?

I have initialized two variables, namely player1 and player2, with different values in JavaScript.

const player1 = {undefined};
const player2 = {null};
Upon calling player1, it returns an object containing an undefined property while on the other hand, player2 returns null. This is due to the fact that the values assigned to the variables are different. Undefined means that the variable has been declared but has no value while null means that the variable has been assigned a value of null which signifies the absence of any object value.

Answers(2)
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Vogi
24 days ago
Verified Answer
It seems like you have initialized two variables in JavaScript with different values. The value of player1 is an object containing an undefined property while the value of player2 is null. This is because undefined means that the variable has been declared but has no value while null means that the variable has been assigned a value of null which signifies the absence of any object value.
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Tolerim
25 days ago
The reason behind this is that when an object is declared with curly braces {} and no values are assigned to its properties, the properties are assigned the value of undefined by default. In the case of player1, an empty object is assigned to the variable player1, which has the default value of undefined for its undefined property. On the other hand, player2 is explicitly assigned the value of null, which is a special value in JavaScript that represents the intentional absence of any object value. Therefore, player2 returns null.
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