39 lines
1.1 KiB
TypeScript
39 lines
1.1 KiB
TypeScript
import { VNode } from "https://esm.sh/v118/preact@10.15.1/src/index.js";
|
|
import React from "react";
|
|
|
|
const CTXString = React.createContext("lol");
|
|
|
|
const Butt =(props:{label:string})=>
|
|
{
|
|
const [countGet, countSet] = React.useState(3);
|
|
return <button onClick={e=>countSet(countGet+1)}>{props.label+" -- "+countGet}</button>;
|
|
};
|
|
|
|
type StateBinding<T> = [get:T, set:React.StateUpdater<T>];
|
|
const CTXState = React.createContext(null) as React.Context<StateBinding<string>|null>;
|
|
const Outer =(props:{children:VNode})=>
|
|
{
|
|
const binding = React.useState("lol?");
|
|
return <CTXState.Provider value={binding}>
|
|
{props.children}
|
|
</CTXState.Provider>
|
|
};
|
|
const Inner =()=>
|
|
{
|
|
const binding = React.useContext(CTXState);
|
|
return <button onClick={e=>binding && binding[1](Math.random().toString())}>{binding?.[0]??"(its null)"}!</button>
|
|
};
|
|
|
|
|
|
export default ()=>
|
|
{
|
|
return <CTXString.Provider value="intradestink">
|
|
<div><h1>hey???</h1></div>
|
|
<Outer>
|
|
<Inner/>
|
|
</Outer>
|
|
<Outer>
|
|
<Inner/>
|
|
</Outer>
|
|
</CTXString.Provider>
|
|
} |