Provide type checking support for HTML attribute values in rsx macro

[mrgzi]

Feature Request

Since Rust is a strongly typed language, it seems sensible to check types in HTML attribute values as well. Currently, rsx macro allows the following usage:

pub fn component() -> Element {
    rsx! {
        input {
            r#type: "text",
            maxlength: "10",
        }
    }
}

However, the maxlength attribute should actually be an integer:

pub fn component() -> Element {
    rsx! {
        input {
            r#type: "text",
            maxlength: 10,
        }
    }
}

Implement Suggestion

Forcing developers to use strongly typed HTML might not be a good idea. However, this feature could still be beneficial for some. I propose two options:

1. We could issue compiler warnings instead of errors for type mismatches.
2. We could introduce a configuration option in Dioxus.toml, such as typed_rsx = true, which would make the rsx macro emit errors if there are type mismatches in attribute values.

I’m also considering whether it would be a good idea to define enums for types like InputType, etc.

Another consideration is that traditionally, HTML attributes always accept strings:

<label for="name">Name (4 to 8 characters):</label>
<input type="text" id="name" name="name" required minlength="4" maxlength="8" size="10" />

While I am still not sure whether this is a good idea, I would like to get opinions about this feature request.