Overview
TypeScript is a strict syntactical superset of JavaScript that adds optional static typing.
Why It Matters
TypeScript adds static typing to JavaScript, catching errors at compile time.
Essential Commands
tsc --initCreate tsconfig.json configuration file
tsc --noEmitType-check project without emitting JS
tsc -p tsconfig.jsonCompile project using tsconfig
ts-node src/index.tsRun TypeScript directly in Node
npm run lintRun linter for TypeScript project
npx vitest runRun tests in TypeScript projects
Quick Start
Master use interfaces and types for contracts first
Key Concepts
Use interfaces and types for contracts
Leverage generics for reusable components
Master union types and discriminated unions
Pro Tips
- Combine multiple commands for powerful workflows
- Use aliases to speed up your command entry
- Create scripts to automate repetitive tasks
Common Pitfalls to Avoid
- • Forgetting to check the documentation for edge cases
- • Running commands without understanding their full impact
- • Not testing changes in a safe environment first