TypeScript

TypeScript is a statically typed superset of JavaScript that adds optional type annotations and advanced features for improved code quality and development efficiency.

TypeScript Getting Started refers to setting up the TypeScript compiler and tools to begin writing and transpiling TypeScript code in a local project.

Configuring the compiler involves setting up TypeScript's options and behavior through a tsconfig.json file to customize how code is compiled and type-checked.

TS Simple Types" refers to the basic data types in TypeScript, such as number, string, boolean, null, and undefined.

An implicit type is a type automatically inferred by TypeScript based on the value assigned to a variable or expression, without explicit type annotation.

TypeScript special types include any, unknown, never, void, and undefined, each serving specific roles in type checking and safety.

In TypeScript, unknown is a type-safe counterpart of any that ensures you can't use a value of type unknown without narrowing its type first.

In TypeScript, never represents a type that contains no values and is used to indicate a function that never returns or an impossible type.

In TypeScript, arrays are collections of elements of a specific type, defined using square brackets or the Array<T> syntax.

In TypeScript, tuples are arrays with fixed sizes and specific types for each element, allowing for more precise type definitions.

In TypeScript, object types define the shape of objects by specifying the properties and their types.

In TypeScript, enums are a way to define a set of named constants, which can be numeric or string values.

In TypeScript, aliases and interfaces define custom types, with aliases providing type shorthand and interfaces allowing for more structured type definitions and extensions.

In TypeScript, union types allow a variable to hold values of multiple specified types.

In TypeScript, functions are defined with specific parameter and return types, ensuring type safety and correctness in function usage.

Function types can be defined separately from functions using type aliases.

In TypeScript, casting with <> is a way to assert the type of a value, allowing you to treat it as a specific type.

In TypeScript, classes are blueprints for creating objects with defined properties and methods, supporting object-oriented programming features such as inheritance and encapsulation.

In TypeScript, parameter properties allow you to define and initialize class properties directly in the constructor parameters.

In TypeScript, inheritance using extends allows a class to inherit properties and methods from another class, enabling reuse and extension of functionality.

Basic generics in TypeScript allow functions, classes, and types to operate with various data types while maintaining type safety and reusability.

Utility types in TypeScript are built-in types that help manipulate and transform other types for more flexible and reusable code.

Exclude creates a type by excluding specific types from a union type.

Keyof creates a union type of all property keys of a given type.

null represents the intentional absence of any object value or the lack of a value.

Definitely Typed is a repository of TypeScript type definitions for popular JavaScript libraries.

TypeScript 5 updates introduce new features, enhancements, and improvements to the TypeScript language and tooling.