javascript – 如何在ES Next中扩展静态属性？

有时(尽管很少)你需要扩展,而不是覆盖父静态属性,例如下面的(非常蹩脚)示例：

class Person {
    static coreStats = {
        role: "slacker",
        weapon: null,
        speed: 4,
        vechicle: "roller blades",
    };
}

class Ninja extends Person {
    static coreStats = {
        role: "silent assassin",
        weapon: "katana",
        speed: 99,
    };
}

console.log(Ninja.coreStats); // But vechicle is no more

如何在不破坏父属性的情况下扩展子类中的静态属性？

解决方法:

你可以这样做：

class Person {
    static coreStats = {
        role: "slacker",
        weapon: null,
        speed: 4,
        vechicle: "roller blades",
    };
}

class Ninja extends Person {
    static coreStats = Object.assign({}, Person.coreStats, {
        role: "silent assassin",
        weapon: "katana",
        speed: 99
    });
}
console.log(Ninja.coreStats);

这将合并coreStats并在重复的情况下覆盖Person.coreStats和Ninja.coreStats

标签：javascript,ecmascript-next
来源： https://codeday.me/bug/20190608/1200506.html