The <animateMotion> SVG element provides a way to define how an element moves along a motion path.

The <feMorphology> SVG filter primitive is used to erode or dilate the input image. Its usefulness lies especially in fattening or thinning effects.

Regular expressions are patterns used to match character combinations in strings. In JavaScript, regular expressions are also objects. These patterns are used with the exec() and test() methods of RegExp, and with the match(), matchAll(), replace(), replaceAll(), search(), and split() methods of String. This chapter describes JavaScript regular expressions. It provides a brief overview of each syntax element. For a detailed explanation of each one's semantics, read the regular expressions reference.

The <use> element takes nodes from within the SVG document, and duplicates them somewhere else. The effect is the same as if the nodes were deeply cloned into a non-exposed DOM, then pasted where the use element is, much like cloned template elements.

The bitwise OR assignment (|=) operator performs bitwise OR on the two operands and assigns the result to the left operand.

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

The URIError object represents an error when a global URI handling function was used in a wrong way.

The Set object lets you store unique values of any type, whether primitive values or object references.

The <mpath> SVG sub-element for the <animateMotion> element provides the ability to reference an external <path> element as the definition of a motion path.

The stroke-linecap attribute is a presentation attribute defining the shape to be used at the end of open subpaths when they are stroked.