Node.js Cheat .Sheet

nodejs-cheatsheet.js

// Global Objects
// https://nodejs.org/api/globals.html

__filename;    // The filename (resolved absolute path) of the code being executed.
__dirname;     // The name of the directory that the currently executing script resides in. (absolute path)
global;        // The global namespace object.

process;       // The process object https://nodejs.org/api/process.html
    process.chdir(directory); // Changes the current working directory of the process or throws an exception if that fails.
    process.cwd();            // Returns the current working directory of the process.
    process.env;              // An object containing the user environment. You can write to this object.
    process.exit([code]);     // Ends the process with the specified code.
    process.exitCode;         // A number which will be the process exit code, when the process exits.
    process.stdout            // A Writable Stream to stdout (on fd 1).
    process.stderr            // A writable stream to stderr (on fd 2).
    process.stdin;            // A Readable Stream for stdin (on fd 0).
    process.argv;             // An array containing the command line arguments.
    process.execPath;         // This is the absolute pathname of the executable that started the process.
    process.execArgv;         // This is the set of Node.js-specific command line options from the executable that started the process. 

console;       // Console object. Used to print to stdout and stderr. https://nodejs.org/api/console.html
    console.log([data][, ...]);    // Prints to stdout. printf()-like format. See util.format(). 
    console.info([data][, ...]);   // See console.info()
    console.error([data][, ...]);  // Prints to stderr.
    console.warn([data][, ...]);   // See console.warn()
    console.dir(obj[, options]);   // Uses util.inspect on obj and prints resulting string to stdout.
    console.time(label);           // Starts a named timer. 
    console.timeEnd(label);        // Stops a named timer and prints elapsed time in ms.
    
module;        // A reference to the current module. https://nodejs.org/api/modules.html
    module.exports;
    module.filename

setTimeout(cb, ms)   // Run callback cb after at least ms milliseconds.
clearTimeout(t)      // Stop a timer that was previously created with setTimeout(). t is the value returned by setTimeout()
setInterval(cb, ms)  // Run callback cb repeatedly every ms milliseconds. 
clearInterval(t)     // Stop a timer that was previously created with setInterval(). t is the value returned by setInterval()

setImmediate(callback[, arg][, ...])   // To schedule the "immediate" execution of callback after I/O events callbacks and before setTimeout and setInterval.
clearImmediate(immediateObject)        // Stops an immediate from triggering. immediateObject is returned from setImmediate()