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Node.js lets developers use JavaScript to write command line tools and for server-side scripting. The ability to run JavaScript code on the server is often used to generate dynamic web page content before the page is sent to the user's web browser.
Node.js programs are invoked by running the interpreter node interpreter with a given file, so the first two arguments will be node and the name of the JavaScript source file. It is often useful to extract the rest of the arguments by slicing a sub-array from process.argv .
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 .
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.
A key element of server-side programming is server-side scripting, which allows the server to react to client requests in real time. Some popular server-side languages are: PHP: PHP is a widely used, open-source server-side scripting language. It is embedded in HTML code and is particularly well-suited for web development.
Other uses include the Node.js and Deno runtime systems. SpiderMonkey is developed by Mozilla for use in Firefox and its forks. The GNOME Shell uses it for extension support. JavaScriptCore is Apple's engine for its Safari browser. Other WebKit-based browsers and the Bun runtime system also use it. KJS from KDE was the starting point for its ...
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 ...
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.