The Object.assign() static method copies all enumerable own properties from one or more source objects to a target object. It returns the modified target object.

The codePointAt() method of String values returns a non-negative integer that is the Unicode code point value of the character starting at the given index. Note that the index is still based on UTF-16 code units, not Unicode code points.

The toLowerCase() method of String values returns this string converted to lower case.

The slice() method of String values extracts a section of this string and returns it as a new string, without modifying the original string.

The SVG <image> element allows for raster images to be rendered within an SVG object.

Scalable Vector Graphics (SVG) is an XML-based markup language for describing two-dimensional based vector graphics.

An AsyncIterator object is an object that conforms to the async iterator protocol by providing a next() method that returns a promise fulfilling to an iterator result object. The AsyncIterator.prototype object is a hidden global object that all built-in async iterators inherit from. It provides an [Symbol.asyncIterator]() method that returns the async iterator object itself, making the async iterator also async iterable.

JavaScript has a runtime model based on an event loop, which is responsible for executing the code, collecting and processing events, and executing queued sub-tasks. This model is quite different from models in other languages like C and Java.

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 Array object, as with arrays in other programming languages, enables storing a collection of multiple items under a single variable name, and has members for performing common array operations.