The `tsc` npm package is the TypeScript compiler, which is used to compile TypeScript code into JavaScript. It provides a variety of functionalities including type checking, transpiling TypeScript to JavaScript, and generating declaration files.
Transpile TypeScript to JavaScript
This command takes a TypeScript file (`input.ts`) and compiles it into a JavaScript file (`output.js`).
tsc input.ts --outFile output.jsType Checking
This command performs type checking on the TypeScript files in the project without emitting any JavaScript output. It is useful for ensuring type safety.
tsc --noEmitGenerate Declaration Files
This command generates a declaration file (`output.d.ts`) for the given TypeScript file (`input.ts`). Declaration files are useful for providing type information to other TypeScript projects.
tsc input.ts --declaration --outFile output.d.tsWatch Mode
This command runs the TypeScript compiler in watch mode, which means it will recompile the project whenever a file changes. This is useful for development workflows.
tsc --watchProject Compilation
This command compiles a TypeScript project based on the configuration specified in the `tsconfig.json` file. It allows for more complex project setups and configurations.
tsc --project tsconfig.jsonBabel is a JavaScript compiler that can also transpile TypeScript to JavaScript. Unlike `tsc`, Babel focuses more on transforming modern JavaScript syntax and features to be compatible with older environments. It requires additional plugins to handle TypeScript.
esbuild is an extremely fast JavaScript bundler and minifier that also supports TypeScript. It is known for its speed and efficiency, but it does not perform type checking like `tsc` does.
swc (Speedy Web Compiler) is a super-fast TypeScript/JavaScript compiler written in Rust. It can be used to transpile TypeScript to JavaScript and is known for its performance. However, like esbuild, it does not perform type checking.
Use typescript to get access to the tsc CLI command.
FAQs
A deprecated release of the TypeScript compiler
We found that tsc demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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