Have you ever wondered about the curious world of JavaScript equality comparisons? π€ Brace yourself for a dive into some peculiar scenarios where JavaScript's loose equality rules can lead to surprising results! Let's explore these quirky questions together! πβ¨
console.log(0 == null); // ?
Answer:
The output is:
false
In JavaScript, null
is only equal to undefined
, not 0
.
console.log(0 >= null); // ?
Answer:
The output is:
true
This might seem odd, but in JavaScript, when >=
is used with null
, it is coerced to 0
. So 0 >= null
becomes 0 >= 0
, which is true
.
console.log(0 <= null); // ?
Answer:
The output is:
true
Similar to the previous question, <=
with null
coerces null
to 0
, making 0 <= null
effectively 0 <= 0
, which is true
.
console.log(false == null); // ?
Answer:
The output is:
false
In JavaScript, false
is not equal to null
. They are of different types and values.
console.log(false <= null); // ?
Answer:
The output is:
true
This is another case of coercion. false
is coerced to 0
and null
to 0
, making 0 <= 0
, which is true
.
console.log(false >= null); // ?
Answer:
The output is:
true
Similar to the previous cases, both false
and null
are coerced to 0
, so 0 >= 0
is true
.
JavaScript's loose equality comparisons can lead to some unexpected results! Keep these quirks in mind as you navigate the JavaScript landscape, and always test your code to understand what's happening under the hood! π§β¨