The DataView view provides a low-level interface for reading and writing multiple number types in a binary ArrayBuffer, without having to care about the platform's endianness.

The <polygon> SVG element defines a closed shape consisting of a set of connected straight line segments. The last point is connected to the first point.

The <symbol> SVG element is used to define graphical template objects which can be instantiated by a <use> element.

The JavaScript exception "super() called twice in derived class constructor" occurs when the super() is called a second time for a given derived class constructor.

The JavaScript exception "repeat count must be non-negative" occurs when the String.prototype.repeat() method is used with a count argument that is a negative number.

The [Symbol.iterator]() method of arguments objects implements the iterable protocol and allows arguments objects to be consumed by most syntaxes expecting iterables, such as the spread syntax and for...of loops. It returns an array iterator object that yields the value of each index in the arguments object.

The JavaScript exception "new keyword cannot be used with an optional chain" occurs when the constructor of a new expression is an optional chain, or if there's an optional chain between the constructor and the parenthesized list of arguments.

The <style> SVG element allows style sheets to be embedded directly within SVG content.

The attributeName attribute indicates the name of the CSS property or attribute of the target element that is going to be changed during an animation.

Run and Debug Python code in the Web.