The bitwise OR (|) operator returns a number or BigInt whose binary representation has a 1 in each bit position for which the corresponding bits of either or both operands are 1.

The right shift assignment (>>=) operator performs right shift on the two operands and assigns the result to the left operand.

The cursor attribute specifies the mouse cursor displayed when the mouse pointer is over an element.

Static initialization blocks are declared within a class. It contains statements to be evaluated during class initialization. This permits more flexible initialization logic than static properties, such as using try...catch or setting multiple fields from a single value. Initialization is performed in the context of the current class declaration, with access to private state, which allows the class to share information of its private properties with other classes or functions declared in the same scope (analogous to "friend" classes in C++).

The optional chaining (?.) operator accesses an object's property or calls a function. If the object accessed or function called using this operator is undefined or null, the expression short circuits and evaluates to undefined instead of throwing an error.

The k4 attribute defines one of the values to be used within the arithmetic operation of the <feComposite> filter primitive.

The font-style attribute specifies whether the text is to be rendered using a normal, italic, or oblique face.

The logical AND assignment (&&=) operator only evaluates the right operand and assigns to the left if the left operand is truthy.

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