payload-is/lib/esm/classes.js

A comprehensive TypeScript/JavaScript type checking library providing functions to check data types, collections, primitives, and built-in objects

function isClasses(fn) {
  if (fn.prototype === void 0) {
    return false;
  }
  if (fn.toString().startsWith("class ")) {
    return true;
  }
  return false;
}

export { isClasses };
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