In this field, specify the version of the TypeScript to use (WebStorm displays the currently chosen version).
By default, the
typescriptpackage from the project's node_modules folder is used.
Bundled: choose this option to use the
typescriptpackage that is shipped with WebStorm without attempting to find another one.
Select: choose this option to use a custom
typescriptpackage instead of the one bundled with WebStorm. In the dialog that opens, choose the path to the relevant package.
If your project package manager is Yarn 2, you have to use the
typescriptpackage installed via Yarn 2. In this case,
yarn:package.json:typescriptis by default selected.
Learn more about package managers from npm and Yarn.
TypeScript Language Service
Select this checkbox to get native support from the TypeScript Language Service according to the up-to-date specifications. As a result:
Syntax and error highlighting is based on the annotations from the TypeScript Language Service.
Completion lists contain both suggestions from the TypeScript Language Service and suggestions calculated by WebStorm.
Recompile on changes
In this field, specify the command-line options to be passed to the TypeScript Language Service when the tsconfig.json file is not found. See the list of acceptable options at TSC arguments. Note that the