In the above table, ToNumber(A) attempts to convert its argument to a number before comparison. Its behavior is equivalent to +A (the unary + operator). ToPrimitive(A) attempts to convert its object argument to a primitive value, by attempting to invoke varying sequences of A.toString and A.valueOf methods on A.
In the above table:
+ToNumber(A) attempts to convert its argument to a number before comparison. Its behavior is equivalent to +A (the unary + operator).ToPrimitive(A) attempts to convert its object argument to a primitive value, by invoking varying sequences of A.toString and A.valueOf methods on A.ℝ(A) attempts to convert its argument to an ECMAScript mathematical value.StringToBigInt(A) attempts to convert its argument to a BigInt by applying the ECMAScript StringToBigInt algorithm.Traditionally, and according to ECMAScript, all objects are loosely unequal to undefined and null. But most browsers permit a very narrow class of objects (specifically, the document.all object for any page), in some contexts, to act as if they emulate the value undefined. Loose equality is one such context: null == A and undefined == A evaluate to true if, and only if, A is an object that emulates undefined. In all other cases an object is never loosely equal to undefined or null.