nodejslearnerfiles/2.Modules-require-npm/node_modules/performance-now/src/index.d.ts

Very Good Beginnings if you want to Learn Node.js

// This file describes the package to typescript.

/**
 * Returns the number of milliseconds since the page was loaded (if browser)
 * or the node process was started.
 */
declare function now(): number;
export = now;