Skip to main content Accessibility Feedback

Chris Ferdinandi

Hi, I’m Chris Ferdinandi. I help people learn vanilla JavaScript.

My pocket guides are used by developers at places like Chobani, the Boston Globe, and 10up. My JavaScript plugins are used by organizations like Apple, Harvard Business School, and CNN.

I want to help you master vanilla JavaScript, without all of the painful false starts and roadblocks I encountered when I was learning.

Frequently Asked Questions

Does the pocket guide include new ES6 methods?
Yes. Where applicable, I cover new ES6 functions and browser APIs. I also include polyfills when available to push browser support as far back as possible.
What happens if I buy a pocket guide and you release an update? Will I need to buy the new version, too?
No. You get free updates for life, sent to you by email whenever new content is available.
Can I buy a print version of the pocket guide?
Pocket guides are available exclusively in digital formats. This makes it easy for you to get updates whenever new techniques, approaches, and best practices emerge. Given the rapidly changing nature of the web, this ensures you'll always have the latest and greatest version of the guide.
Do you offer team discounts?
Yes! The pocket guide bundles are available as team licenses at a steep discount.
Do you offer a student discount?
Absolutely! This applies to anyone in any type of schooling, including evening classes and coding bootcamps. Learn more about student discounts.
I have a poor exchange rate in USD. There's no way I can afford this.
I totally get that in some countries salaries and cost of living are such that the pocket guides are unaffordable. Send me an email at and I'll send you a discount to make it fair for where you live.
I'm not a student. Any other discounts?
Yep. I've had a lot of helping getting where I am, and I want to pay it forward. If you're a member of an under-represented group in tech, you can get special pricing. Learn more about discounts for under-represented groups in tech.
Do you have a return policy?
Absolutely! If you’re not 100% satisfied with the pocket guide, email me at within 30 days of purchase and I’ll give you a full refund.
If I buy just one guide and love it, can I upgrade to a bundle?
Absolutely. Just send me an email at for a special discount code for the difference between the two packages.
If I buy the ebook and decide I'd also like the video series, can I upgrade?
Absolutely. Just send me an email at for a special discount code for the difference between the two formats.
I lost or never received my download link. What do I do?
Visit and create an account with the email address you used to make your purchase to access your downloads at any time.
Are there any restrictions on the pocket guides or source code?
Nope. I trust you to do the right thing. My content is 100% DRM free. If you'd like to share the pocket guide with others, please email me at for information about team pricing.
Do I need any special tools or equipment to use the pocket guides?
All you need to work with the source code, projects and labs is a modern web browser and a text editor (I recommend VS Code). The pocket guides come in PDF, EPUB, MOBI, and HTML formats, so you can read it on any device you own.
Do I need any prior knowledge or experience to learn vanilla JavaScript?
Ideally you're comfortable working with HTML and CSS already. Experience with another library or framework (like jQuery, React, and so on) is helpful but not required. If you're brand new to JavaScript, the guide is a great resource! If you have any specific questions, though, please email me at
Are there any rules or requirements around the Slack team?
Yes. You must be at least 18 years old, and read and agree to follow the Code of Conduct.
I have another question.
No problem! Send me an email at

Get Daily Developer Tips

I send out a short email each weekday with code snippets, tools, techniques, and interesting stuff from around the web. Join 4,000+ daily subscribers.