The k1 attribute defines one of the values to be used within the arithmetic operation of the <feComposite> filter primitive.

The dominant-baseline attribute specifies the dominant baseline, which is the baseline used to align the box's text and inline-level contents. It also indicates the default alignment baseline of any boxes participating in baseline alignment in the box's alignment context.

The less than (<) operator returns true if the left operand is less than the right operand, and false otherwise.

The dy attribute indicates a shift along the y-axis on the position of an element or its content.

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

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 class keyword can be used to define a class inside an expression.

The TypedArray.BYTES_PER_ELEMENT static data property represents the size in bytes of each element in a typed array.

The copyWithin() method of TypedArray instances shallow copies part of this typed array to another location in the same typed array and returns this typed array without modifying its length. This method has the same algorithm as Array.prototype.copyWithin().

The __defineGetter__() method of Object instances binds an object's property to a function to be called when that property is looked up.