Program

Emits the JavaScript and declaration files. If targetSourceFile is not specified, then the JavaScript and declaration files will be produced for all the files in this program. If targetSourceFile is specified, then only the JavaScript and declaration for that specific file will be generated.

Calculates the final resolution mode for an import at some index within a file's imports list. This function only returns a result when module resolution settings allow differing resolution between ESM imports and CJS requires, or when a mode is explicitly provided via import attributes, which cause an import or require condition to be used during resolution regardless of module resolution settings. In absence of overriding attributes, and in modes that support differing resolution, the result indicates the syntax the usage would emit to JavaScript. Some examples:

Calculates the final resolution mode for a given module reference node. This function only returns a result when module resolution settings allow differing resolution between ESM imports and CJS requires, or when a mode is explicitly provided via import attributes, which cause an import or require condition to be used during resolution regardless of module resolution settings. In absence of overriding attributes, and in modes that support differing resolution, the result indicates the syntax the usage would emit to JavaScript. Some examples:

Get a list of root file names that were passed to a 'createProgram'

The first time this is called, it will return global diagnostics (no location).

Get a list of files in the program

Gets a type checker that can be used to semantically analyze source files in the program.