将存储在子组件内函数中的值传递给 React 中的父组件

Question

Below is my code.

CHILD COMPONENT

  const onSave = () => {
    var val = value
    props.onSave();
  }

<div onClick={() => { onSave() }}>
            <CheckButton variant="contained" text-align='center' />
          </div>

PARENT COMPONENT

export const Card = (props) => {
    const onSave = (val) => { [I WANT TO ACCESS val within here] }
}


<TextInputContainer onSave={() => onSave()} />

Is there any way I can access that variable val inside the parent component? The code is truncated big-time. The actual code uses Redux.

Answer 1

The createRef of react helps u to access the value of a react component:

Reference ( https://pt-br.reactjs.org/docs/hooks-reference.html )

constructor () {this.CheckButtonRef = createRef()}
onSave = () => {props.onSave(this.CheckButtonRef.current.value)}
<CheckButton ref = {this.CheckButtonRef}/>