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Select element last element cant be set programatically
Problem
use yew::prelude::*;
#[function_component]
fn App() -> Html {
let selection_handle = use_state(|| 2_usize);
html! {
<div>
<select >
<option value=1 selected={*selection_handle == 1}>{ "Option 1" }</option>
<option value=2 selected={*selection_handle == 2}>{ "Option 2" }</option>
<option value=3 selected={*selection_handle == 3}>{ "Option 3" }</option>
<option value=4 selected={*selection_handle == 4}>{ "Option 4" }</option>
</select>
<button onclick={ {let selection_handle = selection_handle.clone(); Callback::from(move |_| selection_handle.set(1))} }>{"Set to 1"}</button>
<button onclick={ {let selection_handle = selection_handle.clone(); Callback::from(move |_| selection_handle.set(2))} }>{"Set to 2"}</button>
<button onclick={ {let selection_handle = selection_handle.clone(); Callback::from(move |_| selection_handle.set(3))} }>{"Set to 3"}</button>
<button onclick={ {let selection_handle = selection_handle.clone(); Callback::from(move |_| selection_handle.set(4))} }>{"Set to 4"}</button>
</div>
}
}
fn main() {
yew::start_app::<App>();
}
click "Set to 4" observe how select shows "Option 1" not 4
Environment:
- Yew version: [
0.19,master]
Questionnaire
- [ ] I'm interested in fixing this myself but don't know where to start
- [ ] I would like to fix and I have a solution
- [ x] I don't have time to fix this right now, but maybe later
On MDN it says selected is only used for first load.
Its possible we need to introduce custom yew attribute for select so we could pass value
I believe react solved this exactly that way, with introduction of value and defaultValue on select tag
Related? #1322
Related? #1322
i dont think so
For now this bug can be worked around:
use web_sys::HtmlSelectElement;
use yew::prelude::*;
#[function_component]
fn App() -> Html {
let selection_handle = use_state(|| 2_usize);
let select_node_ref = use_node_ref();
{
let select_node_ref = select_node_ref.clone();
use_effect_with_deps(
move |selection| {
if let Some(element) = select_node_ref.cast::<HtmlSelectElement>() {
element.set_value(&(selection.to_string()));
}
|| {}
},
*selection_handle,
)
};
html! {
<div>
<select ref={select_node_ref}>
<option value=1>{ "Option 1" }</option>
<option value=2>{ "Option 2" }</option>
<option value=3>{ "Option 3" }</option>
<option value=4>{ "Option 4" }</option>
</select>
<button onclick={ {let selection_handle = selection_handle.clone(); Callback::from(move |_| selection_handle.set(1))} }>{"Set to 1"}</button>
<button onclick={ {let selection_handle = selection_handle.clone(); Callback::from(move |_| selection_handle.set(2))} }>{"Set to 2"}</button>
<button onclick={ {let selection_handle = selection_handle.clone(); Callback::from(move |_| selection_handle.set(3))} }>{"Set to 3"}</button>
<button onclick={ {let selection_handle = selection_handle.clone(); Callback::from(move |_| selection_handle.set(4))} }>{"Set to 4"}</button>
</div>
}
}
fn main() {
yew::start_app::<App>();
}
Related? #1322
i dont whink so
Going by your fix of calling set_value, I'd say it is related