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// create context with no upfront defaultValue | |
// without having to do undefined check all the time | |
function createCtx<A>() { | |
const ctx = React.createContext<A | undefined>(undefined) | |
function useCtx() { | |
const c = React.useContext(ctx) | |
if (!c) throw new Error("useCtx must be inside a Provider with a value") | |
return c | |
} | |
return [useCtx, ctx.Provider] as const |
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{ | |
"version": "0.2.0", | |
"configurations": [ | |
{ | |
"name": "Example", | |
"type": "node", | |
"request": "launch", | |
"runtimeExecutable": "node", | |
"runtimeArgs": ["--nolazy", "-r", "ts-node/register/transpile-only"], |
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import * as React from 'react'; | |
interface FormProps { | |
/** | |
* Automatically prevents the default browser behavior so you don't have to | |
*/ | |
onSubmit: () => any; | |
children?: JSX.Element; | |
} | |
export const Form = ({ onSubmit, children}: FormProps) => |