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https://flic.kr/p/t3H9A Tugberk Ugurlu Software Engineer @ Redgate @tourismgeek http://tugberkugurlu.com

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https://flic.kr/p/e6nUW Once upon a time…

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SQL Clone Web Client

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https://flic.kr/p/faTRHU JavaScript!

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https://flic.kr/p/7yqhJt More JavaScript!

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https://flic.kr/p/6doME6 Oh, more JavaScript!

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https://flic.kr/p/6sZ7Kp Fuck this shit!

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https://flic.kr/p/cEJMpW TypeScript…

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https://flic.kr/p/UfHzTE TypeScript!

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Hold your seats! https://flic.kr/p/HnfDT

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https://charlieharvey.org.uk/page/javascript_the_weird_parts JavaScript: The Friend of Your Enemy! x = [0] x == x -> true x == !x -> true #wtf true+true===2 -> true true-true===0 -> true true===1 -> false #wtf (!+[]+[]+![]).length -> 9 #wtf []+[] -> "" []+{} -> "[object Object]“ {}+[] -> 0 #wtf 0.1+0.2==0.3 -> false Math.max()>Math.min() -> false #wtf

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Primary Motivations Compile-time safety (catch things early) Take advantage of TypeScript language features Make the context available on each module

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Compile-time Safety

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Compile-time Safety

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Making the Context Available

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Making the Context Available

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TypeScript Language Features

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Migration Experience https://flic.kr/p/o8WrWD

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Moving Gradually...

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tsconfig.json

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Typings

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TypeLite

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VS Code

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TSLint

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TSLint VS Code Integration

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https://twitter.com/dan_abramov/status/780475600716857344 :+1:

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That’s all! https://flic.kr/p/99iZtS