Can TypeScript be used with existing JavaScript code? -

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i working on pretty big existing web application team. time time experience common javascript coding nuances case difference while function calling or missing operator etc.

i find typescript promising solution such issues specially while working team on different files/modules. has many benefits like

  • static code analysis
  • better auto-completion
  • code minification
  • dead code reduction
  • string type checking
  • strict oop

i know there converters available can convert javascript typescript not want convert existing project files typescript.

i wondering if possible keep existing code , develop new modules/files in typescript. may can migrate existing files in gradual manner.

will work together? how it?

i have tried read online couldn't find relevant information other converting existing projects typescript.

yes. the language spec :

typescript syntactic sugar javascript. typescript syntax superset of ecmascript 6 (es6) syntax.

every javascript program typescript program. typescript compiler performs file-local transformations on typescript programs , not re-order variables declared in typescript. leads javascript output closely matches typescript input. typescript not transform variable names, making tractable direct debugging of emitted javascript. typescript optionally provides source maps, enabling source-level debugging. typescript tools typically emit javascript upon file save, preserving test, edit, refresh cycle commonly used in javascript development.


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