Lesson 20: Advanced JavaScript Concepts

Overview

This lesson covers advanced JavaScript concepts including closures, promises, and async/await.

Graphical Preview

Graphical representation of advanced concepts will be shown here.

Code Preview

                // Example of a closure
                function makeCounter() {
                    let count = 0;
                    return function() {
                        count++;
                        return count;
                    };
                }
                const counter = makeCounter();
                console.log(counter()); // 1
                console.log(counter()); // 2

Lesson 20: Advanced JavaScript Concepts

Overview

This lesson covers advanced JavaScript concepts including closures, promises, and async/await.

Graphical Preview

Graphical representation of advanced concepts will be shown here.

Code Preview

                // Example of a closure
                function makeCounter() {
                    let count = 0;
                    return function() {
                        count++;
                        return count;
                    };
                }
                const counter = makeCounter();
                console.log(counter()); // 1
                console.log(counter()); // 2
`; const blob = new Blob([htmlContent], { type: 'text/html' }); const url = URL.createObjectURL(blob); const a = document.createElement('a'); a.href = url; a.download = 'lesson20.html'; a.click(); URL.revokeObjectURL(url); }); document.getElementById('download-js').addEventListener('click', function() { const jsContent = `// Example of a closure function makeCounter() { let count = 0; return function() { count++; return count; }; } const counter = makeCounter(); console.log(counter()); // 1 console.log(counter()); // 2`; const blob = new Blob([jsContent], { type: 'application/javascript' }); const url = URL.createObjectURL(blob); const a = document.createElement('a'); a.href = url; a.download = 'lesson20.js'; a.click(); URL.revokeObjectURL(url); });