The exponentiation assignment (**=) operator performs exponentiation on the two operands and assigns the result to the left operand.

The glyph-orientation-horizontal attribute affects the amount that the current text position advances as each glyph is rendered.

JavaScript applications consist of statements with an appropriate syntax. A single statement may span multiple lines. Multiple statements may occur on a single line if each statement is separated by a semicolon. This isn't a keyword, but a group of keywords.

The JSON namespace object contains static methods for parsing values from and converting values to JavaScript Object Notation (JSON).

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

The markerHeight attribute represents the height of the viewport into which the <marker> is to be fitted when it is rendered according to the viewBox and preserveAspectRatio attributes.

The kernelMatrix attribute defines the list of numbers that make up the kernel matrix for the <feConvolveMatrix> element.

The import.meta meta-property exposes context-specific metadata to a JavaScript module. It contains information about the module, such as the module's URL.

The strict inequality (!==) operator checks whether its two operands are not equal, returning a Boolean result. Unlike the inequality operator, the strict inequality operator always considers operands of different types to be different.

The kernelUnitLength attribute has two meanings based on the context it's used in. For lighting filter primitives, it indicates the intended distance for the x and y coordinates, for <feConvolveMatrix>, it indicates the intended distance between successive columns and rows in the kernel matrix.