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See how TypeScript improves day to day working with JavaScript with minimal additional syntax. JavaScript EssentialsHello WorldObjects and ArraysFunctionsCode FlowFunctions with JavaScriptGeneric FunctionsTyping FunctionsFunction ChainingWorking With ClassesClasses 101ThisGeneric ClassesMixinsModern JavaScriptAsync AwaitImmutabilityImport ExportJSDoc SupportExternal APIsTypeScript with WebTypeScript with ReactTypeScript with DenoTypeScript with NodeTypeScript with WebGLHelping with JavaScriptQuick FixesErrorsExplore how TypeScript extends JavaScript to add more safety and tooling. PrimitivesAnyLiteralsUnion and Intersection TypesUnknown and NeverType PrimitivesTuplesBuilt-in Utility TypesNullable TypesMeta-TypesConditional TypesDiscriminate TypesIndexed TypesMapped TypesLanguageSoundnessStructural TypingType GuardsType Widening and NarrowingLanguage ExtensionsEnumsNominal TypingTypes vs Interfaces
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