The operator attribute has two meanings based on the context it's used in. Either it defines the compositing or morphing operation to be performed.

The stroke-linejoin attribute is a presentation attribute defining the shape to be used at the corners of paths when they are stroked.

A quantifier repeats an atom a certain number of times. The quantifier is placed after the atom it applies to.

The JavaScript strict mode exception "can't assign to property" occurs when attempting to create a property on primitive value such as a symbol, a string, a number or a boolean. Primitive values cannot hold any property.

The markerUnits attribute defines the coordinate system for the markerWidth and markerHeight attributes and the contents of the <marker>.

The JavaScript exception "missing ] after element list" occurs when there is an error with the array initializer syntax somewhere. Likely there is a closing square bracket (]) or a comma (,) missing.

The textLength attribute, available on SVG <text> and <tspan> elements, lets you specify the width of the space into which the text will draw. The user agent will ensure that the text does not extend farther than that distance, using the method or methods specified by the lengthAdjust attribute. By default, only the spacing between characters is adjusted, but the glyph size can also be adjusted if you change lengthAdjust.

The text-anchor attribute is used to align (start-, middle- or end-alignment) a string of pre-formatted text or auto-wrapped text where the wrapping area is determined from the inline-size property relative to a given point.

The JavaScript exception "TypeError: can't set prototype: it would cause a prototype chain cycle" occurs when an object's prototype is set to an object such that the prototype chain becomes circular (a and b both have each other in their prototype chains).

The JavaScript exception "getting private setter-only property" occurs when reading the value of a private element for which only a setter is defined.