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An environment variable is a user-definable value that can affect the way running processes will behave on a computer. Environment variables are part of the ...
JavaScript is the server-side language used to develop services for the Opera Unite feature of the Opera browser. This is a server built into the browser. The JavaScript API includes local file access to a virtual sandboxed file-system and persistent storage via persistent global variables. PostgreSQL: V8: Embedded language PLV8 [7]
Ryan Dahl, creator of Node.js, in 2010 Rocket Turtle, the official mascot of Node.js since February 2024 Node.js was initially written by Ryan Dahl in 2009, [ 10 ] about 13 years after the introduction of the first server-side JavaScript environment, Netscape's LiveWire Pro Web. [ 11 ]
The runtime environment includes not only accessible state values, but also active entities with which the program can interact during execution. For example, environment variables are features of many operating systems, and are part of the runtime environment; a running program can access them via the runtime system. Likewise, hardware devices ...
ECMAScript is commonly used for client-side scripting on the World Wide Web, and it is increasingly being used for server-side applications and services using runtime environments such as Node.js, [3] Deno [4] and Bun. [5]
var x1 = 0; // A global variable, because it is not in any function let x2 = 0; // Also global, this time because it is not in any block function f {var z = 'foxes', r = 'birds'; // 2 local variables m = 'fish'; // global, because it wasn't declared anywhere before function child {var r = 'monkeys'; // This variable is local and does not affect the "birds" r of the parent function. z ...
It is used to either print a list of environment variables or run another utility in an altered environment without having to modify the currently existing environment. Using env, variables may be added or removed, and existing variables may be changed by assigning new values to them. In practice, env has another common use. It is often used by ...
The ECMA-262 specification defines scope as: a lexical environment in which a Function object is executed in client-side web scripts; [9] akin to how scope is defined in lambda calculus. [10] As a part of the "MVC" architecture, the scope forms the "Model", and all variables defined in the scope can be accessed by the "View" as well as the ...