@jest/source-map

constructor

constructor();

method getCallsite

getCallsite: (
    level: number,
    sourceMaps?: SourceMapRegistry | null
) => callsites.CallSite;

• One remapped CallSite, level frames above the caller.

method install

install: (
    sourceMaps?: SourceMapRegistry | null,
    options?: SourceMapSupportInstallOptions
) => void;

• Replaces Error.prepareStackTrace in the current realm, so error.stack renders frames against the original sources.

  Stays installed for the lifetime of the worker — each call swaps in its own cache. There is deliberately no uninstall: restoring V8's formatter at teardown would leave an error thrown after the environment is torn down pointing into the transformed file. Holding the cache does not retain the environment: it only ever references path strings and parsed source maps.

property suppressWarnings

suppressWarnings?: boolean;

• Turns off the once-per-map warning about maps that cannot be parsed.