How to Inject TypeScript Into Existing Projects
summary
Concrete migration plan with tools and results: start at the deep end of the dependency graph, convert the shared utility first, and get immediate type coverage; add @types/ packages (for example @types/react and @types/react-dom) and maintain .d.ts files to get IDE signatures without transpiling; use Babel preset-typescript as a stepping stone, then run tsc or switch webpack to awesome-typescript-loader or ts-loader for real compile-time errors; the approach compiles and surfaces type errors while leaving most JS untouched.
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chapters (36)
- 0:00Introduction
- 1:17What is TypeScript
- 2:05Who has tried TypeScript
- 2:31TypeScript is popular
- 4:27The learning curve
- 4:51Friends or enemies
- 5:11Coexistence
- 5:48Who is this for
- 6:30Example
- 8:47Where to Start
- 9:15React Example
- 9:53Bank Form Example
- 10:23Validations
- 11:35Phases
- 15:12Phase 1 Install Type Definitions
- 15:50Visual Studio Code
- 16:33NPM Install
- 16:45Callback
- 17:00Maintain Definition Files
- 17:48Example Code
- 18:30Definition File
- 20:33TypeScript Preset
- 21:26Install TypeScript
- 21:37TS Configuration File
- 21:47Project Configurations
- 23:23Importing TS
- 23:55Webpack
- 24:25Babel Preset
- 24:45Compilation Errors
- 25:16Type Definition
- 25:27Type Security
- 26:03TypeScript Compiler
- 26:35Relieve Babel Duties
- 27:08Webpack Configuration
- 27:32TypeSecurity
- 27:52Recap
