Node.js Global Objects

Node.js Global Objects

When working with Node.js, you will often come across global objects. These are built-in objects available across all modules in a Node.js application. The best part ÔÇö you do not need to explicitly import them; they can be used directly. Note that some of these objects are not strictly in the global scope but exist within the module scope.

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Common Node.js Global Objects

• __dirname ÔÇö absolute path of the current directory
• __filename ÔÇö absolute path of the current file
• console ÔÇö logging and debugging
• process ÔÇö info about the running process
• Buffer ÔÇö handling binary data
• setTimeout / setInterval / setImmediate and their clear functions ÔÇö timers

Node.js __dirname

__dirname is a string representing the absolute path of the directory that holds the currently executing script.

// global-example1.js
console.log(__dirname);

// Run: node global-example1.js

Node.js __filename

__filename provides the absolute path of the file being executed, including the file name.

// global-example2.js
console.log(__filename);

// Run: node global-example2.js

Timers as Global Objects

setTimeout(() => {
  console.log('Runs after 2 seconds');
}, 2000);

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Final Thoughts

Node.js global objects make coding easier by providing direct access to useful values and methods without requiring imports. Getting comfortable with __dirname, __filename, process, and timers will save you time. For more Node.js guides, stay connected with .

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