A lookbehind assertion "looks behind": it attempts to match the previous input with the given pattern, but it does not consume any of the input — if the match is successful, the current position in the input stays the same. It matches each atom in its pattern in the reverse order.

The JavaScript exception "too much recursion" or "Maximum call stack size exceeded" occurs when there are too many function calls, or a function is missing a base case.

The <title> element provides an accessible, short-text description of any SVG container element or graphics element.

The font-size attribute refers to the size of the font from baseline to baseline when multiple lines of text are set solid in a multiline layout environment.

The get syntax binds an object property to a function that will be called when that property is looked up. It can also be used in classes.

The color-interpolation attribute specifies the color space for gradient interpolations, color animations, and alpha compositing.

The addition (+) operator produces the sum of numeric operands or string concatenation.

The yield* operator is used to delegate to another iterable object, such as a Generator.

The textual content for a <text> SVG element can be either character data directly embedded within the <text> element or the character data content of a referenced element, where the referencing is specified with a <tref> element.

The equality (==) operator checks whether its two operands are equal, returning a Boolean result. Unlike the strict equality operator, it attempts to convert and compare operands that are of different types.