stdweb/webapi/
slotable.rs

1use webcore::reference_type::ReferenceType;
2use webapi::html_elements::SlotElement;
3
4/// The Slotable mixin defines features that allow nodes to become the contents of
5/// a `<slot>` element — the following features are included in both Element and Text.
6///
7/// [(JavaScript docs)](https://developer.mozilla.org/en-US/docs/Web/API/Slotable)
8// https://dom.spec.whatwg.org/#slotable
9pub trait ISlotable: ReferenceType {
10    /// returns a `SlotElement` representing the `<slot>` element the node is inserted in.
11    ///
12    /// [(JavaScript docs)](https://developer.mozilla.org/en-US/docs/Web/API/Slotable/assignedSlot)
13    // https://dom.spec.whatwg.org/#ref-for-dom-slotable-assignedslot
14    fn assigned_slot( &self ) -> Option< SlotElement > {
15        unsafe {
16            js!( return @{self.as_ref()}.assignedSlot; ).into_reference_unchecked()
17        }
18    }
19}
20
21#[cfg(all(test, feature = "web_test"))]
22mod tests {
23    use super::*;
24    use webapi::node::{Node, INode, CloneKind};
25    use webapi::parent_node::IParentNode;
26    use webapi::html_elements::{SlotElement, TemplateElement};
27    use webapi::shadow_root::ShadowRootMode;
28    use webapi::html_element::HtmlElement;
29    use webcore::try_from::TryInto;
30    use webapi::element::IElement;
31
32    #[test]
33    fn test_assigned_slot() {
34        let div: HtmlElement = Node::from_html("<div><span></span></div>")
35            .unwrap()
36            .try_into()
37            .unwrap();
38        let span = div.query_selector("span").unwrap().unwrap();
39        let tpl: TemplateElement = Node::from_html("<template><slot></slot></template>")
40            .unwrap()
41            .try_into()
42            .unwrap();
43
44        assert_eq!(span.assigned_slot(), None);
45
46        let shadow_root = div.attach_shadow(ShadowRootMode::Open).unwrap();
47        let n = tpl.content().clone_node(CloneKind::Deep).unwrap();
48        shadow_root.append_child(&n);
49
50        let slot: SlotElement = shadow_root
51            .query_selector("slot")
52            .unwrap()
53            .unwrap()
54            .try_into()
55            .unwrap();
56
57        assert_eq!(span.assigned_slot(), Some(slot));
58    }
59}
stdweb/webapi/slotable.rs

stdweb/webapi/
slotable.rs
