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Редактировал(а) Alexandr Fokin 2023/12/29 14:48
Последние авторы
1 |(% style="width:84px" %) |(% style="width:1353px" %)React + [[TypeScript>>doc:Разработка.Frontend.Промежуточные языки.TypeScript.WebHome]]
2 |(% style="width:84px" %) |(% style="width:1353px" %){{code language="html"}}import { useState, createElement, ElementType } from 'react'
3
4 interface componentProp {
5 selectedComponent: string,
6 prop1: number,
7 onClick: (state: componentProp) => void
8 };
9
10 function Component1(prop: componentProp) {
11 return (
12 <div>
13 <p>component1 {prop.prop1}</p>
14 <button
15 onClick={() => { prop.onClick({ ...prop, prop1: prop.prop1 + 1 }) }}
16 >
17 Increment
18 </button>
19 <button
20 onClick={() => { prop.onClick({ ...prop, selectedComponent: "c2" }) }}
21 >
22 To component2
23 </button>
24 <button
25 onClick={() => { prop.onClick({ ...prop, selectedComponent: "unknow name" }) }}
26 >
27 Bad component
28 </button>
29 </div>
30 )
31 }
32 function Component2(prop: componentProp) {
33 return (
34 <div>
35 <p>component2 {prop.prop1}</p>
36 <button
37 onClick={() => { prop.onClick({ ...prop, prop1: prop.prop1 + 1 }) }}
38 >
39 Increment
40 </button>
41 <button
42 onClick={() => { prop.onClick({ ...prop, selectedComponent: "c1" }) }}
43 >
44 To component1
45 </button>
46 </div>
47 )
48 }
49
50 const mapping = new Map<string, ElementType>()
51 .set("c1", Component1)
52 .set("c2", Component2);
53
54 function App() {
55
56 const [state, setState] = useState<componentProp>(
57 {
58 selectedComponent: "c1",
59 prop1: 10,
60 onClick: (q) => {
61 setState(q)
62 }
63 });
64
65 const selectedComponent = mapping.get(state.selectedComponent);
66
67 if (selectedComponent === undefined) {
68 return (<>
69 <div>Not defined "{state.selectedComponent}"</div>
70 </>);
71 }
72
73 return (
74 <>
75 <div>
76 {createElement(selectedComponent, state) }
77 </div>
78 </>
79 )
80 }
81
82 export default App{{/code}}
83 |(% style="width:84px" %) |(% style="width:1353px" %)