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You Don't Know JS: ES6 & Beyond"font style: normal; font variant: normal; font weight: normal; letter spacing: normal; line height: 15px; orphans: auto; text align: justify; text indent: 0px; text transform: none; white space: normal; widows: 1; word spacing: 0px; webkit text stroke width: 0px; color: rgb(51, 51, 51); font family: Arial, Verdana, Geneva, Helvetica, sans serif; font size: 12px; background color: rgb(255, 255, 255);"No matter how much experience you have with
"font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 15px; orphans: auto; text-align: justify; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; color: rgb(51, 51, 51); font-family: Arial, Verdana, Geneva, Helvetica, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);"No matter how much experience you have with JavaScript, odds are you dont fully understand the language. As part of the "You Dont Know JS" series, this compact guide focuses on new features available in ECMAScript 6 (ES6), the latest version of the standard upon which JavaScript is built."font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 15px; orphans: auto; text-align: justify; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; color: rgb(51, 51, 51); font-family: Arial, Verdana, Geneva, Helvetica, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);"Like other books in this series, You Dont Know JS: ES6 & Beyond dives into trickier parts of the language that many JavaScript programmers either avoid or know nothing about. Armed with this knowledge, you can achieve true JavaScript mastery."font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 15px; orphans: auto; text-align: justify; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; color: rgb(51, 51, 51); font-family: Arial, Verdana, Geneva, Helvetica, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);"With this book, you will: Learn new ES6 syntax that eases the pain points of common programming idioms Organize code with iterators, generators, modules, and classes Express async flow control with Promises combined with generators Use collections to work more efficiently with data in structured ways Leverage new API helpers, including Array, Object, Math, Number, and String Extend your programs capabilities through meta programming Preview features likely coming to JS beyond ES6Shipping Notes
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4.1 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 4
Puppy interactive toy
Color: Orange, Color: Orange
It’s a great toy as it keeps my 5 month old puppy very entertained! It is pretty hardy and made of good material as she tries to throw it around and chew it. She does swing it around and the hard part will hit her. She doesn’t seem bothered by it tho lol good size and minimum noise
When I first introduced her to it she was a little scared but now she gets excited to play with it once it finishes charging.
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Cool toy. Fun for all
Color: Blue
A cool toy. entertainment for the dogs but more so for the dog parents to watch the dogs reaction. Comes with an additional rope just in case, which I loved. Only side note I would say is that the fast mood could be a little faster. My Golden retriever figured out the speed in less than 24 hours and now picks up the toy to try to chew it up, instead of chasing. With him attempting to chew on the toy in the small time I give him, there are no teeth marks yet…this toy appears to be durable. We play in short increments but enjoy the toy.
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Reviewed in the United States on May 29, 2026
★★★★★ 3
Fun toy, but not durable for large heavy chewers
Color: Orange, Color: Orange
I bought this for my 80+ pound Goldendoodle, and he absolutely loved it at first. He barked at it, chased it, and it gave him some great exercise and stimulation. It definitely kept his attention and was fun to watch him play with it.
Unfortunately, once he was able to get it in his mouth, he chewed the orange end off fairly quickly. The company does include an extra replacement piece, which is actually a great idea and appreciated. However, he ended up chewing that one up too after a few more play sessions.
This toy worked well for short-term play and entertainment, but it’s not durable enough for large dogs with strong chewing habits. I think this would be much better suited for small to medium dogs.
Great concept, but I would not repurchase for a heavy chewer.
Picture of my dog for size reference!! 🫶🐶
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Reviewed in the United States on February 17, 2026
★★★★★ 5
My Dog Loves It!
Color: Orange
Great interactive toy for my dog! The quality is nice, no weird smell, and it keeps my dog entertained and active for a long time. Worth the price!
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Good quality and definitely worth it for energetic dogs.
Color: Orange
The automatic moving and rolling action really grabs my dog’s attention, and the rope adds extra fun for chasing and playing. It helps reduce boredom and keeps my dog mentally stimulated, especially when indoors. The motion activation works well, and it’s a fun and engaging toy overall.
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Reviewed in the United States on May 3, 2026