30秒学会 JavaScript 片段 – isPlainObject

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.

代码片段

const isPlainObject = val => !!val && typeof val === 'object' && val.constructor === Object;

使用样例

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