Create memo component with react & context
If your React Application Working with the Context API, it could help you to create React.memo component quickly, which is better way to avoid unnecessary render.
// App.tsx
import { createContext, useState } from 'react'
import { createMemoComponent } from 'memor'
import Layout from './components/Layout'
interface State {
foo: string
bar: number
baz: boolean
}
export const Context = createContext({} as State)
export const connect = createMemoComponent<IState>(Context)
export const App = () => {
const [ initialState, setState ] = useState()
return <>
<Context.Provider value={initialState}>
<Layout incomingProp="hah" />
</Context.Provider>
</>
}then, in the children Component:
// Layout.tsx
import { FC } from 'react'
import { ConnectedProps } from 'memor'
import { connect } from "../App"
const connector = connect(state => ({
foo: state.foo
}))
type Props = ConnectedProps<typeof connector> & {
incomingProp: string
}
const Layout: FC<Props> = (props) => {
return (
<div>
<p>supProp: {props.incomingProp}</p>
<p>contextProp: {props.foo}</p>
</div>
)
}
export default connector(Layout)Layout component would rerender only state.foo in Context changed or incomingProp changed.