如何在寓言中扩展JS类 [英] How to extend a JS class in fable

问题描述

给出一个在外部JS库中定义的类(我们称其为Foo)，然后我想在F#中进行扩展

Given a class defined in an external JS library (let's call it Foo) then I'd like to extend in F#

type bar() = 
   inherits Foo
   ...

但是我只能找到有关如何与函数集成的示例

However I can' only find examples of how to integrate with functions

和

[<Import("Foo", from="my-module")>]
let Foo = JsNative

当然不会让我从Foo派生Bar.那我该怎么做

will of course not let me derive Bar from Foo. So how Do I do that

推荐答案

Import 属性可用于 type 声明.例如

The Import attribute can be used on a type declaration. e.g.

[<Import("Foo", from="my-module")>]
type Foo() =
    class
    end

type Bar() =
    inherit Foo()

然后，您还可以包括班级成员的签名.查看诸如Fable React声明之类的导入示例很有启发性:

You can then also include signatures for the members of the class. It's instructive to look at examples of imports like the Fable React declarations: https://github.com/fable-compiler/fable-react/blob/master/src/Fable.React/Fable.Import.React.fs

这篇关于如何在寓言中扩展JS类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！