The max attribute specifies the maximum value of the active animation duration.

The nullish coalescing assignment (??=) operator, also known as the logical nullish assignment operator, only evaluates the right operand and assigns to the left if the left operand is nullish (null or undefined).

The ry attribute defines a radius on the y-axis.

The Uint8Array typed array represents an array of 8-bit unsigned integers. The contents are initialized to 0 unless initialization data is explicitly provided. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).

A lookbehind assertion "looks behind": it attempts to match the previous input with the given pattern, but it does not consume any of the input — if the match is successful, the current position in the input stays the same. It matches each atom in its pattern in the reverse order.

The repeatDur attribute specifies the total duration for repeating an animation.

The panose-1 attribute indicates the Panose-1 number of a font face.

The pointsAtY attribute represents the y location in the coordinate system established by attribute primitiveUnits on the <filter> element of the point at which the light source is pointing.

The clipPathUnits attribute indicates which coordinate system to use for the contents of the <clipPath> element.

The color-interpolation attribute specifies the color space for gradient interpolations, color animations, and alpha compositing.