d8

D8 is a command-line tool primarily used for executing JavaScript applications or scripts written using the ECMAScript 2015 (ES6) syntax. It is part of the V8 JavaScript engine, which is developed by Google and serves as the backbone for running JavaScript code in various applications and platforms.

D8 provides a convenient way to carry out quick experiments, verify code behavior, or execute JavaScript programs directly from the command line without the need for a browser environment or additional tools. It can be especially useful in automated build processes, testing frameworks, or server-side JavaScript applications.

In addition to executing JavaScript code, D8 offers various options and flags to customize the runtime environment, enable or disable specific features, or specify additional resources to load. It also provides the ability to inspect generated intermediate JavaScript bytecode and perform basic debugging operations through a built-in debugging server.

Overall, D8 serves as a versatile command-line tool for running JavaScript applications, providing developers with a quick and efficient way to execute, test, and debug JavaScript code in various contexts.