Web Reference: Welcome to this comprehensive JavaScript inheritance tutorial, where you'll learn all about the extends keyword in JavaScript! 🎉 Whether you're a beginner or looking to deepen your... Jul 8, 2025 · Extending built-in objects This example extends the built-in Date object. This example is extracted from this live demo (source). Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
YouTube Excerpt: An example of how you can extract a prototype of an object and then replace the prototype's methods with new custom methods.
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