title: isPlainObject tags: type,object,intermediate

Checks if the provided value is an object created by the Object constructor.

Check if the provided value is truthy, use typeof to check if it is an object and Object.constructor to make sure the constructor is equal to Object.

const isPlainObject = (val: any) =>
  !!val && typeof val === "object" && val.constructor === Object;

isPlainObject({ a: 1 }); // true
isPlainObject(new Map()); // false