The <font-face-src> SVG element corresponds to the src descriptor in CSS @font-face rules. It serves as container for <font-face-name>, pointing to locally installed copies of this font, and <font-face-uri>, utilizing remotely defined fonts.

The diffuseConstant attribute represents the kd value in the Phong lighting model. In SVG, this can be any non-negative number.

The font-weight attribute refers to the boldness or lightness of the glyphs used to render the text, relative to other fonts in the same font family.

The decrement (--) operator decrements (subtracts one from) its operand and returns the value before or after the decrement, depending on where the operator is placed.

SVG is an XML language, similar to XHTML, which can be used to draw vector graphics, such as the one shown below. It can be used to create an image either by specifying all the lines and shapes necessary, by modifying already existing raster images, or by a combination of both. The image and its components can also be transformed, composited together, or filtered to change their appearance completely.

The bias attribute shifts the range of the filter. After applying the kernelMatrix of the <feConvolveMatrix> element to the input image to yield a number and applied the divisor attribute, the bias attribute is added to each component. This allows representation of values that would otherwise be clamped to 0 or 1.

The await operator is used to wait for a Promise and get its fulfillment value. It can only be used inside an async function or at the top level of a module.

The logical AND (&&) (logical conjunction) operator for a set of boolean operands will be true if and only if all the operands are true. Otherwise it will be false.

The <rect> element is a basic SVG shape that draws rectangles, defined by their position, width, and height. The rectangles may have their corners rounded.

The logical NOT (!) (logical complement, negation) operator takes truth to falsity and vice versa. It is typically used with boolean (logical) values. When used with non-Boolean values, it returns false if its single operand can be converted to true; otherwise, returns true.