The limitingConeAngle attribute represents the angle in degrees between the spot light axis (i.e. the axis between the light source and the point to which it is pointing at) and the spot light cone. So it defines a limiting cone which restricts the region where the light is projected. No light is projected outside the cone.

The Math namespace object contains static properties and methods for mathematical constants and functions.

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

Method definition is a shorter syntax for defining a function property in an object initializer. It can also be used in classes.

The keyTimes attribute represents a list of time values used to control the pacing of the animation.

The bitwise OR (|) operator returns a number or BigInt whose binary representation has a 1 in each bit position for which the corresponding bits of either or both operands are 1.

The height attribute defines the vertical length of an element in the user coordinate system.

An expression statement is an expression used in a place where a statement is expected. The expression is evaluated and its result is discarded — therefore, it makes sense only for expressions that have side effects, such as executing a function or updating a variable.

The <image> SVG element includes images inside SVG documents. It can display raster image files or other SVG files.

The optional chaining (?.) operator accesses an object's property or calls a function. If the object accessed or function called using this operator is undefined or null, the expression short circuits and evaluates to undefined instead of throwing an error.