Course Notes

Typescript is created at Microsoft used to address the shortcommings of Javascript

TS: Adds these features

• Static Typing --> important one
• Code completion
• Refactoring
• Shorthand notations

Static Means that variables are noticed at compile time. Like no "Hoisting" -- C++, C#, JAVA -- type is determined Dynamic Means that variablles are noticed at runtime , and can change soo there is "Hoisting" -- JS, Python, Ruby -- type is not determined

Typesctipt is basically js with typecheking

Drawbacks of Typescripts :

Compilations -- we have to give our TS file to compiler , we call this Transpilation
Disciplined in coding

Get Typescript version

tsc -v in cmd

compile ts

index.ts 'File' in cmd to compile it to js

ts Config tsc --init

• target
• module
• rootDir
• outDir
• removeComments
• noEmitOnError
• sourceMap

Debugging

• add a breakpoint
• go to debug panel and click create a launch.json file
• instantiate launch.json and add this underneath program "preLaunchTask": "tsc: build - tsconfig.json",
• then start debugging

typescript have more datatype than the old ones like : String, Number. boolen, null, undefined. object

they are :

• any - Any can represent any type of values, basically this is an approach on how we can dynamically program in TS
• unknown
• never
• enum -
• tuple - tuples are only usefull with key/value pairs. Limit it to 2

Advanced Types

• Nullable
• Unkknown type
• never type

Tutorial Link

https://www.youtube.com/watch?v=d56mG7DezGs