# Contributors by commit history https://github.com/mdn/content/commits/main/files/en-us/web/svg/attribute/hanging/index.md # Original Wiki contributors Sebastianz 165

The handler.deleteProperty() method is a trap for the [[Delete]] object internal method, which is used by operations such as the delete operator.

The values() method of Array instances returns a new array iterator object that iterates the value of each item in the array.

The setFloat16() method of DataView instances takes a number and stores it as a 16-bit floating point number in the 2 bytes starting at the specified byte offset of this DataView. There is no alignment constraint; multi-byte values may be stored at any offset within bounds.

The filterUnits attribute defines the coordinate system for the attributes x, y, width and height.

Generally speaking, a function is a "subprogram" that can be called by code external (or internal, in the case of recursion) to the function. Like the program itself, a function is composed of a sequence of statements called the function body. Values can be passed to a function as parameters, and the function will return a value.

The scale attribute defines the displacement scale factor to be used on a <feDisplacementMap> filter primitive. The amount is expressed in the coordinate system established by the primitiveUnits attribute on the <filter> element.

The refY attribute defines the y coordinate of an element's reference point.

The rest parameter syntax allows a function to accept an indefinite number of arguments as an array, providing a way to represent variadic functions in JavaScript.

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.