Simple generic memo & forwardRef react functions Usage import { memo, forwardRef } from 'react-generic-funtions'; interface ExampleComponentProps<T> { genericProp: T } const ExampleComponent = forwardRef( <T extends string | number>({ genericProp }: ExampleComponentProps<T>, ref: ForwardedRef...
importReact,{forwardRef}from"react";// Declare a type that works with generic componentstype FixedForwardRef=<T,P={}>(render:(props:P,ref:React.Ref<T>)=>React.ReactElement)=>(props:P&React.RefAttributes<T>)=>React.ReactElement;// Cast the old `forwardRef` to the new oneexportconstfixe...
}//正确const component: React.ReactNode<MyComponent> = <MyComponent />;//错误const component: React.ReactNode<MyComponent> = <OtherComponent />; 上面的代码中,给component变量设置了类型是Mycomponent类型的react实例,这时只能给其赋值其为MyComponent的实例组件。 通常情况下,类组件通过 render() 返回 Re...
Similarly, when working on the parent component, we need to specify the reference type, and it needs to match the one used in forwardRef. To do that, you can use generic types when using useRef as follows:const ref = React.useRef<HTMLInputElement>(null);...
forwardRef is a generic function that has type parameters for the type of the ref and the props: const Component = React.forwardRef<RefType, PropsType>((props, ref) => { return someComponent; }); It’s a bit confusing because the ordering of the generic parameters (ref and then props)...
使用forwardRef,我们获取到ref,并传递给子组件,这是一个包含两个参数的普通函数 // react.d.ts function forwardRef<T, P = {}>( Component: RefForwardingComponent<T, P> ): ComponentType<P & ClassAttributes<T>> // 这里的T,P 1:T是DOM的类型 2:P是传递的Props 3:返回值的定义是混合了props值和...
* of the generic argument. 如果我们这样写,此时ref为RefObject类型RefObject的current被readonly修饰。所以是不可变的。当在范型中指定了| null则根据函数重载命中第一种类型,返回MutableRefObject是可变的。 const ref = useRef<number>(null) ref.current = 2 // 无法分配到 "current" ,因为它是只读属性。
that is exposed to parent components when using* `ref`. As always, imperative code using refs should be avoided in most cases.** `useImperativeHandle` should be used with `React.forwardRef`.** @version 16.8.0* @see https://reactjs.org/docs/hooks-reference.html#useimperativehandle*/复制...
test('finds generic forwardRef type annotation', () => { const path = parseTypescript .statementLast<VariableDeclaration>( `import React from 'react'; const x = React.forwardRef<HTMLDivElement, React.PropsWithChildren<Props>>((props, ref) => {})`, ) .get('declarations')[0] .get('ini...
下面是一个使用forwardRef()并将子级的状态处理函数存储在传递的ref中的示例,然后可以从父级调用该函数。 const App = () => { const childRef = React.useRef(); return ( <Child ref={childRef} /> childRef.current()}>Toggle child )}const Child = React.forwardRef((props, ref) => { con...