The Uint8ClampedArray typed array represents an array of 8-bit unsigned integers clamped to 0–255. The contents are initialized to 0. 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).

The <radialGradient> element lets authors define radial gradients that can be applied to fill or stroke of graphical elements.

The rest parameter syntax allows a function to accept an indefinite number of arguments as an array, providing a way to represent variadic functions in JavaScript.

The filterUnits attribute defines the coordinate system for the attributes x, y, width and height.

The flood-color attribute indicates what color to use to flood the current filter primitive subregion.

The multiplication (*) operator produces the product of the operands.

The ideographic attribute indicates the alignment coordinate for glyphs to achieve ideographic baseline alignment for horizontally oriented glyph layouts. The value is an offset in the font coordinate system.

The baseline-shift attribute allows repositioning of the dominant-baseline relative to the dominant-baseline of the parent text content element. The shifted object might be a sub- or superscript.

The color attribute is used to provide a potential indirect value, currentcolor, for the fill, stroke, stop-color, flood-color, and lighting-color attributes.

The <path> SVG element is the generic element to define a shape. All the basic shapes can be created with a path element.