JS如何实现类

• 使用原型

function cat(name) {
    this.name = name
}
cat.prototype.type = 'animal'
cat.prototype.run = function () {
    console.log(`${this.name} is running`);
}
let cat1 = new cat('猫咪')
cat1.run()

• 使用类

class cat{
    constructor(name) {
        this.name=name
    }
    run() {
        console.log(`${this.name} is running`);
    }
}
let cat1 = new cat('猫咪')
cat1.run()