TypeScript

1. 1

   Hallo, TypeScript

   What TypeScript isTsc compile stepRunning a .ts fileThe play button
   20 Min.
2. 2

   Type Basics

   Primitive typesStringNumberBooleanNullUndefined+3
   25 Min.
3. 3

   Arrays und Tuples

   Array typesReadonly arraysTuple typesFixed-length tuplesNamed tuple elements
   25 Min.
4. 4

   Object Types und Interfaces

   Object literal typesInterface keywordRequired vs optional propertiesStructural typingExcess property checks
   25 Min.
5. 5

   Funktionen

   Parameter typesReturn typesVoid returnDefault parametersRest parametersFunction type expressions+1
   25 Min.
6. 6

   Union und Literal Types

   Union typesString literal typesNumeric literal typesLiteral narrowing with as constUnion of object shapes
   25 Min.
7. 7

   Type Narrowing

   Typeof narrowingTruthiness narrowingEquality narrowingIn operator narrowingInstanceof narrowingDiscriminated unions+1
   30 Min.
8. 8

   Type Aliases vs Interfaces

   Type aliasesInterface declarationsExtending interfacesIntersection typesDeclaration mergingWhen to pick which
   20 Min.
9. 9

   Optional, Readonly und Nullable

   Optional propertiesReadonly propertiesNon-null assertion operatorOptional chainingNullish coalescingStrictNullChecks
   25 Min.
10. 10

    Enums

    Numeric enumsString enumsConst enumsEnums vs string literal unionsReverse mapping caveats
    20 Min.
11. 11

    Generics

    Generic functionsGeneric interfacesType parametersType inference for genericsBounded generics with extendsDefault type parameters
    30 Min.
12. 12

    Classes

    Class declarationsConstructorsInstance propertiesAccess modifiers (public, private, protected)Readonly fieldsParameter properties+1
    25 Min.
13. 13

    Vererbung und Abstract Classes

    Extends keywordSuper callsMethod overrideAbstract classesAbstract methodsImplements with interface
    25 Min.
14. 14

    Module

    ES module syntaxNamed exportsDefault exportType-only importsRe-exportsModule resolution basics
    25 Min.
15. 15

    Utility Types

    Partial<T>Required<T>Readonly<T>Pick<T, K>Omit<T, K>Record<K, V>+2
    30 Min.
16. 16

    Mapped und Conditional Types

    Keyof operatorMapped types syntaxKey remapping with asConditional typesInfer keywordDistributive conditional types
    30 Min.
17. 17

    Declaration Files und Libraries

    .d.ts filesDefinitelyTyped (@types packages)Ambient declarationsDeclare moduleTypeRoots and types option
    25 Min.
18. 18

    tsconfig und der Compiler

    Tsconfig.jsonStrict modeTarget and libModule and moduleResolutionOutDir and rootDirIncremental and watch+1
    30 Min.

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