In TypeScript, "typings" refer to type declarations that provide information about the shape and expected types of variables, functions, and objects within your code. TypeScript is a statically typed superset of JavaScript, which means it adds static typing capabilities to the JavaScript language. Since JavaScript is dynamically typed and does not inherently provide a way to declare the types of variables, functions, or objects, TypeScript introduces a system to define these types explicitly.
Typings in TypeScript serve several key purposes:
Static Typing: They enable TypeScript to perform type checking at compile time. This means errors related to incorrect data types can be caught before the code is run, leading to more robust and error-free code[1].
Developer Tooling: Typings improve the development experience by enabling features like auto-completion, inline documentation, and parameter info in code editors. This makes it easier for developers to understand the codebase, use libraries correctly, and avoid common mistakes[1].
Interoperability with JavaScript Libraries: When using JavaScript libraries in a TypeScript project, typings provide the necessary type information for these libraries, allowing them to be used in a statically typed manner. This is crucial because, by default, JavaScript libraries do not include type information[1][4].
Declaration Files: Typings are usually found in declaration files with a .d.ts extension. These files contain type declarations for JavaScript libraries without containing any actual code. They can be manually written for custom libraries or obtained for many popular libraries through the DefinitelyTyped project or directly from the library's package if it inclu...
