const person = { name: 'Lydia' }
function sayHi(age) {
console.log(`${this.name} is ${age}`)
}
sayHi.call(person, 21)
sayHi.bind(person, 21)- A:
undefined is 21Lydia is 21 - B:
functionfunction - C:
Lydia is 21Lydia is 21 - D:
Lydia is 21function







![Native JS implements login function, and local cookies save login information -- [call Netease cloud API interface] - super detailed explanation](/img/e0/1d5c87dc6c8b477a1668083dcdca0f.jpg)

