nova-forms 0.1.11

Build online forms with ease.
Documentation 
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use crate::{Datatype, QueryStringPart, FieldWiring};
use leptos::*;

/// A component that renders an input field.
/// It takes a datatype as a type parameter and automatically handles parsing and validation.
#[component]
pub fn Input<T>(
    /// The label of the input field.
    #[prop(into)] label: TextProp,
    /// The query string that binds the input field to the form data.
    #[prop(into)] bind: QueryStringPart,
    /// The placeholder text of the input field.
    #[prop(optional, into)] placeholder: Option<T>,
    /// The value of the input field.
    #[prop(optional, into)] value: MaybeProp<T>,
    /// A write signal that is updated with the parsed value of the input field.
    #[prop(optional, into)] change: Option<Callback<Result<T, T::Error>, ()>>,
    /// Set a custom error message for the input field.
    #[prop(optional, into)] error: MaybeProp<TextProp>,
) -> impl IntoView
where
    T: Datatype,
{    
    let FieldWiring {
        qs,
        raw_value,
        error,
        set_raw_value,
        render_mode,
        disabled,
        ..
    } = FieldWiring::wire(bind, value, change, error, label.clone());

    // Get value on load from the input field.
    let node_ref = NodeRef::new();
    node_ref.on_load(move |element| {
        let element: &web_sys::HtmlInputElement = &*element;
        let value = element.value();
        if !value.is_empty() {
            set_raw_value.call(value);
        }
    });

    let input_elem = T::attributes()
        .into_iter()
        .fold(html::input(), |el, (name, value)| el.attr(name, value))
        .attr("id", qs.to_string())
        .attr("name", qs.to_string())
        .attr("placeholder", placeholder.as_ref().map(T::to_string))
        .prop("value", move || raw_value.get())
        .prop("disabled", move || disabled.get())
        .node_ref(node_ref)
        .on(ev::input, move |ev| {
            set_raw_value.call(event_target_value(&ev));
        });

    view! {
        <div
            class="field"
            class:error=move || error.get().is_some()
            class:ok=move || error.get().is_none()
        >
            {move || {
                if render_mode.get() {
                    view!{
                        <span class="label">{label.clone()}</span>
                        <span class="value">{raw_value.get()}</span>
                    }.into_view()
                } else {
                    view! {
                        <label for=qs.to_string()>{label.clone()}</label>
                        {input_elem.clone()}
                        {move || {
                            if let Some(error) = error.get() {
                                view! { <span class="error-message">{error}</span> }
                                    .into_view()
                            } else {
                                View::default()
                            }
                        }}
                    }.into_view()
                }
            }}
        </div>
    }
}