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

The data-* SVG attributes are called custom data attributes. They let SVG markup and its resulting DOM share information that standard attributes can't, usually for scripting purposes. Their custom data are available via the SVGElement interface of the element the attributes belong to, with the SVGElement.dataset property.

The fr attribute defines the radius of the focal point for the radial gradient.

The image-rendering attribute provides a hint to the browser about how to make speed vs. quality tradeoffs as it performs image processing.

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

The gradientUnits attribute defines the coordinate system used for attributes specified on the gradient elements.

The JavaScript exception "can't access private field or method: object is not the right class" or "can't set private field: object is not the right class" occurs when a private field or method is get or set on an object that does not have this private property defined.

The g2 attribute specifies a list of glyph names which identify a set of possible second glyphs in the kerning pair.

A modifier overrides flag settings in a specific part of a regular expression. It can be used to enable or disable flags that change the meanings of certain regex syntax elements. These flags are i, m, and s.

A character class escape is an escape sequence that represents a set of characters.