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  2. JavaScript syntax - Wikipedia

    en.wikipedia.org/wiki/JavaScript_syntax

    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 ...

  3. Server-side scripting - Wikipedia

    en.wikipedia.org/wiki/Server-side_scripting

    Server-side scripting is distinguished from client-side scripting where embedded scripts, such as JavaScript, are run client-side in a web browser, but both techniques are often used together. The alternative to either or both types of scripting is for the web server itself to deliver a static web page .

  4. Node.js - Wikipedia

    en.wikipedia.org/wiki/Node_js

    The most significant difference between Node.js and PHP is that most functions in PHP block until completion (commands execute only after previous commands finish), while Node.js functions are non-blocking (commands execute concurrently and use callbacks to signal completion or failure), [29] thus opening up new attack surfaces that are ...

  5. React (software) - Wikipedia

    en.wikipedia.org/wiki/React_(software)

    React server components (RSC) [27] are function components that run exclusively on the server. The concept was first introduced in the talk "Data Fetching with Server Components". [ 28 ] Though a similar concept to Server Side Rendering, RSCs do not send corresponding JavaScript to the client as no hydration occurs.

  6. JavaScript - Wikipedia

    en.wikipedia.org/wiki/JavaScript

    This is an accepted version of this page This is the latest accepted revision, reviewed on 18 February 2025. High-level programming language Not to be confused with Java (programming language), Javanese script, or ECMAScript. JavaScript Screenshot of JavaScript source code Paradigm Multi-paradigm: event-driven, functional, imperative, procedural, object-oriented Designed by Brendan Eich of ...

  7. Common Gateway Interface - Wikipedia

    en.wikipedia.org/wiki/Common_Gateway_Interface

    The script did not correctly sanitize all input and allowed new lines to be passed to the shell, which effectively allowed multiple commands to be run. The results of these commands were then displayed on the Web server. If the security context of the Web server allowed it, malicious commands could be executed by attackers.

  8. Web development - Wikipedia

    en.wikipedia.org/wiki/Web_development

    Node.js (JavaScript): While JavaScript is traditionally a client-side language, Node.js enables developers to run JavaScript on the server side. It is known for its event-driven, non-blocking I/O model , making it suitable for building scalable and high-performance applications.

  9. Environment variable - Wikipedia

    en.wikipedia.org/wiki/Environment_variable

    It is set up by the primary command processor to point to itself (typically reflecting the settings of the CONFIG.SYS directive SHELL), so that the resident portion of the command processor can reload its transient portion from disk after the execution of larger programs. The value can be changed at runtime to reflect changes in the ...