static class 的 Inheritance 属性

Question

Static class properties are inherited:

 const foo = class { static prop = 'this is a static prop' } const bar = class extends foo {} console.log(bar.prop) // 'this is a static prop'

But I thought static properties were akin to the following, which prints undefined as expected:

 const foo = function() {} foo.prop = 'this is a static prop' const bar = function() {} bar.prototype = Object.create(foo.prototype) bar.prototype.constructor = bar console.log(bar.prop) // undefined

So is static class property inheritance magical behavior provided over and above ordinary prototypical inheritance?

Answer 1

Yes. extends does this for you: MDN . You certainly can do an old-school copy/extends for the same behavior.