javascript promises

In this episode of Syntax, Scott and Wes talk about what’s new in web development: new promise static methods, new CSS functions, PWAs and more!

Sentry - Sponsor

If you want to know what’s happening with your errors, track them with Sentry. Sentry is open-source error tracking that helps developers monitor and fix crashes in real time. Cut your time on error resolution from five hours to five minutes. It works with any language and integrates with dozens of other services. Syntax listeners can get two months for free by visiting Sentry.io and using the coupon code “tastytreat”.

Clubhouse - Sponsor

Clubhouse is the first project management software that brings everyone together so that teams can focus on what matters: creating products that customers love. Clubhouse provides a perfect balance of simplicity and structure for better cross-functional collaboration. Check out https://clubhouse.io/syntaxpodcast and get your first two months free.

Show Notes

5:38 - New Promise static methods

• Promise.all
• Promise.race()
• Promise.allSettled()
• Promise.any()

10:16 - Lazy loading images

• Addy Osmani’s Lazy-Loading blog post

14:25 CSS Houdini aka JS in CSS

• • CSS Houdini Experiments

20:32 - Subgrid

• Syntax 109: Hasty Treat - CSS Grid Level 2 aka Subgrid
• Subgrid is coming to Firefox - Jen Simmons
• Bugzilla

24:31 - Native modules in browser

• type="module"
• dynamic import()

27:08 - Node Native Modules update

• package.json will now have a type entry where
• NodeJS - Plan For New Modules Implementation
• New ESM Implementation

29:17 - PWA install app and Google PlayStore

• Already shipped in Chrome
• Java API that communicates through services with Chrome
• Trusted Web Activity aka TWA
• All content in TWAs must comply with Play store policy including policies for payments in-app purchases and other digital goods
• Already existing TWAs include Twitter Lite, Google Maps Go, Instagram Lite
• Passing the PWA Criteria
• Performance Score with a minimum of 80/100, tested with Lighthouse
• All current Google Play Store rules

35:49 - CSS Scroll Snap

• In many browsers already
• scroll-padding

38:17 - Aspect Ratio Unit

• Designing An Aspect Ratio Unit For CSS

39:32 - CSS nesting

• Disallows cross-domain cookies unless on the same domain/subdomain

Links

• Gatsby
• Promise.allSettled()
• Promise.any()
• Apollo
• CodePen
• UC Browser
• Parcel
• Node.js
• Myles Borins’ Twitter
• Twitter Lite
• Google Maps Go
• Instagram Lite
• Lighthouse
• Opera
• Can I Use - modules
• Apple’s ITP

××× SIIIIICK ××× PIIIICKS ×××

• Scott: Finding Drago
• Wes: The Punk Rock MBA

Shameless Plugs

• Scott’s Gridsome Course
• Wes’ Courses

Tweet us your tasty treats!

• Scott’s Instagram
• LevelUpTutorials Instagram
• Wes’ Instagram
• Wes’ Twitter
• Wes’ Facebook
• Scott’s Twitter
• Make sure to include @SyntaxFM in your tweets

Freshbooks — Sponsor

If you are a small business or freelancer check out Freshbooks.com Cloud Accountingand get 30 days free. Make sure to enter SYNTAX into the "How did you hear about us" section.

Show Notes

02:55

• Wes' Async + Await talk on YouTube from DotJS
• JavaScript is Asynchronous
• Ryan Dhal (Creator of Node.js) original Node.js talk

06:00

• Callback Hell
• Q
• Bluebird
• What is a promise?
• Promises are an IOU

8:30

• Async + Await IS promises
• What is Async + Await?
• How does the code look?
• Returning values from an await

15:20

• Performance Considerations
• MEGA PROMISES
• Promise.all()
• Here is an example:
• const [weather, store] = Promise.all(getWeather(), getStores());

19:22

• This stuff is 100% native
• Most new Browser APIs are build on Promises
• Fetch()
• Some examples:
• await fetch(' https://api.github.com/users/wesbos').then(data => data.json())
• OR
• await (await fetch(' https://api.github.com/users/wesbos')).json()
• Axios

22:48

• The Payment Request API
• You should listen to episode 006 on accepting money on the internet
• Web Animation API

27:00

• Snackisodes
• Snack Packs
• Hasty Treats?!!!

28:00

• Making callback-based functions promised basked
• es6-promisify
• util.promisify()

30:00

• Error Handling Methods
• View my slides for some code examples.
• Try/Catch
• High Order Function
• Just handle the error when you callIt().catch(dealWithIt);
• Node's process.on('unhandledRejection') event

36:00

• Browser Support
• Babel it!

38:00

• AbortController()
• Abortable Fetch

SIIIIICK PICKS

42:00

• Scott: Ring Doorbell
• Wes: The Indicator Podcast

47:00

• Sick Tip
• Chrome's Autoplay is changing
• Details on this
• Visit chrome://media-engagement to see your scores

Shameless Plugs

• Fullstack GraphQL
• CSS Grid Course is coming sooooon!

Tweet us your tasty treats!

• Scott's Instagram
• LevelUpTutorials Instagram
• Wes' Instagram
• Wes' Twitter
• Wes' Facebook
• Scott's Twitter
• Make sure to include @SyntaxFM in your tweets