Wes Bos & Scott Tolinski - Full Stack JavaScript Web Developers

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TypeScript Fundamentals × Narrowing, Discriminating Unions, and Type Guards

Syntax - Tasty Web Development Treats

Full Stack Developers Wes Bos and Scott Tolinski dive deep into web development topics, explaining how they work and talking about their own experiences. They cover from JavaScript frameworks like React, to the latest advancements in CSS to simplifying web tooling.

<p class="has-line-data" data-line-start="0" data-line-end="1">In this Hasty Treat, Scott and Wes talk about TypeScript Fundamentals, including narrowing, discriminating unions, and type guards.</p> <h2 class="code-line" data-line-start="2" data-line-end="3"><a id= "Sentry__Sponsor_2" name="Sentry__Sponsor_2"></a>Sentry - Sponsor</h2> <p class="has-line-data" data-line-start="4" data-line-end="5">If you want to know what’s happening with your code, track errors and monitor performance with Sentry. Sentry’s Application Monitoring platform helps developers see performance issues, fix errors faster, and optimize their code health. Cut your time on error resolution from hours to minutes. It works with any language and integrates with dozens of other services. Syntax listeners new to Sentry can get two months for free by visiting <a href= "https://sentry.io">Sentry.io</a> and using the coupon code TASTYTREAT during sign up.</p> <h2 class="code-line" data-line-start="6" data-line-end="7"><a id= "Payments_Hub__Sponsor_6" name= "Payments_Hub__Sponsor_6"></a>Payments Hub - Sponsor</h2> <p class="has-line-data" data-line-start="8" data-line-end="9"> There are hundreds of payments processing companies out there. Hit up <a href= "https://developer.paymentshub.com/syntax">developer.paymentshub.com/syntax</a> to learn more about how Payments Hub Developers not only processes ecommerce and in-person payments, but also boards and underwrites your merchants in as little as 90 minutes. We are currently offering Syntax listeners who become new partners 6 months free data through our Business Reporting API!</p> <h2 class="code-line" data-line-start="10" data-line-end="11"> <a id="Show_Notes_10" name="Show_Notes_10"></a>Show Notes</h2> <ul> <li class="has-line-data" data-line-start="12" data-line-end="13"> <strong><a href="#t=00:24">00:24</a></strong> Welcome</li> <li class="has-line-data" data-line-start="13" data-line-end="14"> <strong><a href="#t=01:35">01:35</a></strong> Sponsor: Sentry</li> <li class="has-line-data" data-line-start="14" data-line-end="15"> <strong><a href="#t=02:23">02:23</a></strong> Sponsor: Payments Hub</li> <li class="has-line-data" data-line-start="15" data-line-end="16"> <strong><a href="#t=05:21">05:21</a></strong> Intro to TypeScript fundamentals</li> <li class="has-line-data" data-line-start="16" data-line-end="17"> <strong><a href="#t=06:28">06:28</a></strong> What is Type Narrowing?</li> <li class="has-line-data" data-line-start="17" data-line-end="18"> <strong><a href="#t=09:32">09:32</a></strong> typeof</li> <li class="has-line-data" data-line-start="18" data-line-end="19"> <strong><a href="#t=11:58">11:58</a></strong> instanceof</li> <li class="has-line-data" data-line-start="19" data-line-end="20"> <strong><a href="#t=13:29">13:29</a></strong> Custom typeguards</li> <li class="has-line-data" data-line-start="20" data-line-end="21"> <strong><a href="#t=16:12">16:12</a></strong> this is</li> <li class="has-line-data" data-line-start="21" data-line-end="23"> <strong><a href="#t=17:59">17:59</a></strong> discriminated unions</li> </ul> <h2 class="code-line" data-line-start="23" data-line-end="24"> <a id="Tweet_us_your_tasty_treats_23" name= "Tweet_us_your_tasty_treats_23"></a>Tweet us your tasty treats</h2> <ul> <li class="has-line-data" data-line-start="25" data-line-end="26"> <a href="https://www.instagram.com/stolinski/">Scott’s Instagram</a></li> <li class="has-line-data" data-line-start="26" data-line-end="27"> <a href= "https://www.instagram.com/LevelUpTutorials/">LevelUpTutorials Instagram</a></li> <li class="has-line-data" data-line-start="27" data-line-end="28"> <a href="https://www.instagram.com/wesbos/">Wes’ Instagram</a></li> <li class="has-line-data" data-line-start="28" data-line-end="29"> <a href="https://twitter.com/wesbos">Wes’ Twitter</a></li> <li class="has-line-data" data-line-start="29" data-line-end="30"> <a href="https://www.facebook.com/wesbos.developer">Wes’ Facebook</a></li> <li class="has-line-data" data-line-start="30" data-line-end="31"> <a href="https://twitter.com/stolinski">Scott’s Twitter</a></li> <li class="has-line-data" data-line-start="31" data-line-end="32"> Make sure to include <a href= "https://twitter.com/SyntaxFM">@SyntaxFM</a> in your tweets</li> </ul>

In this Hasty Treat, Scott and Wes talk about TypeScript Fundamentals, including narrowing, discriminating unions, and type guards.
 Sentry - Sponsor If you want to know what’s happening with your code, track errors and monitor performance with Sentry. Sentry’s Application Monitoring platform helps developers see performance issues, fix errors faster, and optimize their code health. Cut your time on error resolution from hours to minutes. It works with any language and integrates with dozens of other services. Syntax listeners new to Sentry can get two months for free by visiting Sentry.io and using the coupon code TASTYTREAT during sign up.
 Payments Hub - Sponsor There are hundreds of payments processing companies out there. Hit up developer.paymentshub.com/syntax to learn more about how Payments Hub Developers not only processes ecommerce and in-person payments, but also boards and underwrites your merchants in as little as 90 minutes. We are currently offering Syntax listeners who become new partners 6 months free data through our Business Reporting API!
 Show Notes  00:24 Welcome
 01:35 Sponsor: Sentry
 02:23 Sponsor: Payments Hub
 05:21 Intro to TypeScript fundamentals
 06:28 What is Type Narrowing?
 09:32 typeof
 11:58 instanceof
 13:29 Custom typeguards
 16:12 this is
 17:59 discriminated unions
  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

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TypeScript Fundamentals × Narrowing, Discriminating Unions, and Type Guards

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