JavaScript Project
A project without a TSConfig file and TypeScript installed in this guide is referred as a JavaScript project.
This can be a JavaScript library which ships with hand crafted type definitions. To make testing the definitions a breeze, TSTyche sets sensible default compiler options and provides the typescript package.
If your project includes TSConfig file and TypeScript is installed, you should follow the TypeScript Project guide.
Default Compiler Options
If a project does not have a tsconfig.json or a particular test file is not included in any of TSConfig files found in enclosing directories, TSTyche will set the following compiler options:
{
"allowImportingTsExtensions": true, // not set for TypeScript 4.x
"allowJs": true,
"checkJs": true,
"esModuleInterop": true,
"jsx": "preserve",
"module": "esnext", // "preserve" for TypeScript ^5.4
"moduleResolution": "bundler", // "node" for TypeScript 4.x
"resolveJsonModule": true,
"strictFunctionTypes": true,
"strictNullChecks": true,
"target": "esnext"
}Your code editor may have set different default compiler options. This is the reason why TSTyche might see typings different than the editor. If that is an issue, add a tsconfig.json file to a project and it will be used by both TSTyche and the editor.
TypeScript Version
If TypeScript is not installed in a project, TSTyche will add the latest version of the typescript package to the store and will use it for type testing.
To specify other version of TypeScript to test on, pass the --target command line option or use the target configuration option.