×
Copy
Open
Link
Embed
Share
Beginning
This slide
Copy link URL
Copy link URL
Copy iframe embed code
Copy iframe embed code
Copy javascript embed code
Copy javascript embed code
Share
Tweet
Share
Tweet
Slide 1
Slide 1 text
TypeScript: JavaScript you are gonna to love ❤
Slide 2
Slide 2 text
Who am I? ๏5 years of front-end experience ๏big enterprise projects ๏mentor ๏OSS contributor @bobrov1989 https://vitaliy-bobrov.github.io/
Slide 3
Slide 3 text
Agenda ๏WTF TypeScript!? ๏Type system ๏How to Start? ๏Tooling ๏Integrations
Slide 4
Slide 4 text
WTF TypeScript!?
Slide 5
Slide 5 text
Trivial Problem
Slide 6
Slide 6 text
JS Expression Trivia
Slide 7
Slide 7 text
JS Expression Trivia
Slide 8
Slide 8 text
JS Expression Trivia
Slide 9
Slide 9 text
JS Expression Trivia
Slide 10
Slide 10 text
There are NO DEFECTS if there is NO DOCs
Slide 11
Slide 11 text
Trivial Solution
Slide 12
Slide 12 text
jsDoc ๏Too verbose ๏Remember to update ๏No warnings of wrong usage
Slide 13
Slide 13 text
TypeScript JavaScript ESNext Types
Slide 14
Slide 14 text
Any JavaScript is VALID TypeScript
Slide 15
Slide 15 text
ESNext
Slide 16
Slide 16 text
WHY? ๏Complex projects ๏Static analysis ๏Reduce errors rate ๏Easy to refactor and maintain
Slide 17
Slide 17 text
Type System
Slide 18
Slide 18 text
let variable: TYPE;
Slide 19
Slide 19 text
Cheat
Slide 20
Slide 20 text
Base Types
Slide 21
Slide 21 text
Functions
Slide 22
Slide 22 text
Array & Tuple
Slide 23
Slide 23 text
enum
Slide 24
Slide 24 text
Interface
Slide 25
Slide 25 text
Abstract Class
Slide 26
Slide 26 text
Union types
Slide 27
Slide 27 text
Partials
Slide 28
Slide 28 text
DOM API
Slide 29
Slide 29 text
http://www.typescriptlang.org/docs/
Slide 30
Slide 30 text
How to Start?
Slide 31
Slide 31 text
REPL http://www.typescriptlang.org/play/index.html
Slide 32
Slide 32 text
IDE & Text Editors
Slide 33
Slide 33 text
Just change extension from .js to .ts %
Slide 34
Slide 34 text
Tooling
Slide 35
Slide 35 text
JavaScript checks
Slide 36
Slide 36 text
TypeScript compiler
Slide 37
Slide 37 text
tsconfig.json
Slide 38
Slide 38 text
Webpack
Slide 39
Slide 39 text
Parcel https://parceljs.org/
Slide 40
Slide 40 text
TypeWiz https://github.com/urish/typewiz
Slide 41
Slide 41 text
3rd party libraries http://definitelytyped.org/
Slide 42
Slide 42 text
Frameworks
Slide 43
Slide 43 text
No content
Slide 44
Slide 44 text
No content
Slide 45
Slide 45 text
No content
Slide 46
Slide 46 text
https://medium.com/@martin_hotell
Slide 47
Slide 47 text
Integrations
Slide 48
Slide 48 text
Strictly typed REST API calls
Slide 49
Slide 49 text
Just use TypeScript to write NodeJS project %
Slide 50
Slide 50 text
Java / C# Swagger
Slide 51
Slide 51 text
JSON Schema
Slide 52
Slide 52 text
Thank YOU! @bobrov1989 https://vitaliy-bobrov.github.io/