dioxus-core 0.3.1

Core functionality for Dioxus - a concurrent renderer-agnostic Virtual DOM for interactive user experiences
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

use dioxus::core::{ElementId, Mutation::*};
use dioxus::prelude::*;

/// As we clean up old templates, the ID for the node should cycle
#[test]
fn cycling_elements() {
    let mut dom = VirtualDom::new(|cx| {
        cx.render(match cx.generation() % 2 {
            0 => rsx! { div { "wasd" } },
            1 => rsx! { div { "abcd" } },
            _ => unreachable!(),
        })
    });

    {
        let edits = dom.rebuild().santize();
        assert_eq!(
            edits.edits,
            [
                LoadTemplate { name: "template", index: 0, id: ElementId(1,) },
                AppendChildren { m: 1, id: ElementId(0) },
            ]
        );
    }

    dom.mark_dirty(ScopeId(0));
    assert_eq!(
        dom.render_immediate().santize().edits,
        [
            LoadTemplate { name: "template", index: 0, id: ElementId(2,) },
            ReplaceWith { id: ElementId(1,), m: 1 },
        ]
    );

    // notice that the IDs cycle back to ElementId(1), preserving a minimal memory footprint
    dom.mark_dirty(ScopeId(0));
    assert_eq!(
        dom.render_immediate().santize().edits,
        [
            LoadTemplate { name: "template", index: 0, id: ElementId(1,) },
            ReplaceWith { id: ElementId(2,), m: 1 },
        ]
    );

    dom.mark_dirty(ScopeId(0));
    assert_eq!(
        dom.render_immediate().santize().edits,
        [
            LoadTemplate { name: "template", index: 0, id: ElementId(2,) },
            ReplaceWith { id: ElementId(1,), m: 1 },
        ]
    );
}