The stroke-width attribute is a presentation attribute defining the width of the stroke to be applied to the shape. It applies to any SVG shape or text-content element, but as an inherited property, it may be applied to elements such as <g> and still have the intended effect on descendant elements' strokes.

The increment (++) operator increments (adds one to) its operand and returns the value before or after the increment, depending on where the operator is placed.

The break statement terminates the current loop or switch statement and transfers program control to the statement following the terminated statement. It can also be used to jump past a labeled statement when used within that labeled statement.

The InternalError object indicates an error that occurred internally in the JavaScript engine.

The divisor attribute specifies the value by which the resulting number of applying the kernelMatrix of a <feConvolveMatrix> element to the input image color value is divided to yield the destination color value.

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

The cursor attribute specifies the mouse cursor displayed when the mouse pointer is over an element.

The font-style attribute specifies whether the text is to be rendered using a normal, italic, or oblique face.

The constructor method is a special method of a class for creating and initializing an object instance of that class.

Random value generation.