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//1. Object.is 判断两个值是否完全相等 console.log(Object.is(120, 120));// === console.log(Object.is(NaN, NaN));// === console.log(NaN === NaN);// === //2. Object.assign 对象的合并const config1 = { host: 'localhost', port: 3306, name: 'root', pass: 'root', test: 'test'};const config2 = { host: 'http://atguigu.com', port: 33060, name: 'atguigu.com', pass: 'iloveyou', test2: 'test2'}console.log(Object.assign(config1, config2));//3. Object.setPrototypeOf 设置原型对象 Object.getPrototypeofconst school = { name: 'study'}const cities = { xiaoqu: ['北京','上海','深圳']}Object.setPrototypeOf(school, cities);console.log(Object.getPrototypeOf(school));console.log(school);
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