undefined and null

Question

undefined == null is true, the values ​​compared are all 0,

undefined === null is false, because the data types are compared, is this the case?

Answer 1

== means to compare values, such as a=1, b='1', then a==b is true. The three === must be congruent. Not only the array must be equal, but the data type must also be equal, then a ===b is false