JavaScript/TypeScriptArg-Defaults →Arrays-In-Typescript →Basic-Type-In-Typescript →Compiling-Typescript-Project-To-Check-For-Ts-Errors →Conforming-Types-To-Specific-Values →Const-Assertions →Defining-And-Passing-In-Objects-In-Typescript-Functions →Finding-Keys-In-Typescript-Map-Objects →Generics-For-Functions →Generics-For-Interfaces →JSDoc Notation For Types →Optional Types JSDoc →Optional-Properties-In-Ts-Objects →Project-References →Record-Type →Supressing-Ts-Errors-In-Testing →Table Of Contents TypeScript →Type-Variables-In-Ts →Union-Type →