In this video, I examine the concept of “Prototype” in the JavaScript programming language. I look at how you can attach methods to objects via prototype (for both objects of existing JS types or your own). I also discuss the “prototype chain” and prototypal inheritance.

Support this channel on Patreon:

Send me your questions and coding challenges!:

The Coding Train website:

Links discussed in this video:
My Steering Behaviors on the word “Train” video:
Douglas Crockford’s video on prototypes(and many more subjects):
Prototypes on MDN:

Source Code for the all Video Lessons:


For More Coding Challenges:
For an Intro to Programming using p5.js:

Help us caption & translate this video!