functional-programming - Elm - 输入类型复选框

Question

我正在尝试为输入设置 type 属性:

input [ type "checkbox" ] []

但是我收到一个错误:

It looks like the keyword `type` is being used as a variable.
input [ type "checkbox" ] []
       ^
Rename it to something else.

当我尝试使用时

input [ type' "checkbox" ] []

我收到此错误:

Ran into a single quote in a variable name. This was removed in 0.18!
input [ type' "checkbox" ] []
       ^
Change it to a number or an underscore, like type_ or type1
Or better yet, choose a more descriptive name!

如果我尝试

input [ type_ "checkbox" ] []

我收到另一个错误:

Cannot find variable `type_`
input [ type_ "checkbox" ] []
        ^^^^^

那么我最终如何设置这个属性呢？

Answer 1

正确的函数确实名为 type_位于 Html.Attributes 模块中。确保您正确导入它。

-- this exposed type_, checked, and value (as examples)
import Html.Attributes exposing (type_, checked, value)

-- alternatively, to expose everything,
import Html.Attributes exposing (..)