Javascript Programming Tutorials, Guides & Best Practices

    for (let i = 0; i < 3; i++) {
        setTimeout(function() {
            console.log(i); // Output: 0, 1, 2
        }, 1000);
    }

Alternatively, you can create a new scope using an Immediately Invoked Function Expression (IIFE):

const RevealingModule = (function() {
    let privateVariable = 'I am private';

    function privateFunction() {
        console.log(privateVariable);
    }

    function publicFunction() {
        privateFunction();
    }

    // Reveal public pointers to private functions and properties
    return {
        publicFunction: publicFunction
    };
})();

RevealingModule.publicFunction(); // Output: I am private

• More readable and consistent code.
• Clear definition of what is public and what is private.