Variables, Functions, and Scope
What are arrow functions? What’s function hoisting? What’s the difference between
const, and when should you use each? What’s “scope” and how does it work?
🔥 New! Updated with new resources and more backwards-compatible polyfills.
What you’ll learn
- The difference between function expressions and function declarations, and which one to use.
- What function hoisting is, and whether or not it’s a good thing.
- How to scope your code, and why you want to.
- How to conditionally set variables.
- Useful techniques for passing variables into functions and defining default values.
- The difference between functions and methods.
- How to write ES6 arrow functions.
- How to use ES6
constfor defining variables.
📱Read in DRM-free ebook format or watch streaming HD video on any device.
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This is not available for sale at any price, and my students regularly tell me it's one of the most valuable things that comes with the guides.
- Learn modern best practices and code patterns.
- Spend less time Googling and more time working on cool stuff.
- Follow a learning path or jump around based on your needs.
- Work on real projects and build your portfolio.
A Sample Lesson
What are fat arrow functions and how do they work?
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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.
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- No. You get free updates for life, sent to you by email whenever new content is available.
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- 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.
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- Yes! I offer team licenses at a steep discount. Send me an email at firstname.lastname@example.org to discuss your needs.
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- Absolutely! This applies to anyone in any type of schooling, including evening classes and coding bootcamps. Learn more about student discounts.
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- 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 email@example.com and I'll send you a discount to make it fair for where you live.
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- 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.
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- Absolutely! If you’re not 100% satisfied with the pocket guide, email me at firstname.lastname@example.org 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 email@example.com 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 firstname.lastname@example.org for a special discount code for the difference between the two formats.
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- 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 email@example.com for information about team pricing.
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- All you need to work with the source code and projects 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.
- Are there any rules or requirements around the Slack team?
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