The right shift (>>) operator returns a number or BigInt whose binary representation is the first operand shifted by the specified number of bits to the right. Excess bits shifted off to the right are discarded, and copies of the leftmost bit are shifted in from the left. This operation is also called "sign-propagating right shift" or "arithmetic right shift", because the sign of the resulting number is the same as the sign of the first operand.

The font-variant attribute indicates whether the text is to be rendered using variations of the font's glyphs.

The accent-height attribute defines the distance from the origin to the top of accent characters, measured by a distance within the font coordinate system.

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

The unary negation (-) operator precedes its operand and negates it.

A named backreference refers to the submatch of a previous named capturing group and matches the same text as that group. For unnamed capturing groups, you need to use the normal backreference syntax.

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

The new.target meta-property lets you detect whether a function or constructor was called using the new operator. In constructors and functions invoked using the new operator, new.target returns a reference to the constructor or function that new was called upon. In normal function calls, new.target is undefined.

The set syntax binds an object property to a function to be called when there is an attempt to set that property. It can also be used in classes.

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