pass data from parent to child component react code example
Example 1: react pass prop to parent
import React, { useState, Component } from 'react';
import Input from '../../shared/input-box/InputBox'
const Form = function (props) {
const [value, setValue] = useState('');
const onchange = (data) => {
setValue(data)
console.log("Form>", data);
}
return (
<div>
<Input data={value} onchange={(e) => { onchange(e) }}/>
</div>
);
}
export default Form;
import React from 'react';
const Input = function (props) {
console.log("Props in Input :", props);
const handleChange = event => {
props.onchange(event.target.value);
}
return (
<div>
<input placeholder="name"
id="name"
onChange= {handleChange}
/>
</div>
);
}
export default Input;
Example 2: how to pass props from child to parent
class ToDoList extends React.Component { constructor(props) { super(props); this.state = { listDataFromChild: null }; }, myCallback = (dataFromChild) => { this.setState({ listDataFromChild: dataFromChild }); }, otherFn = () => { [...within this other function now I still have access to this.state.listDataFromChild...] } render() { return ( <div> <ToDoItem callbackFromParent={this.myCallback}/> [...now here I can pass this.state.listDataFromChild as a prop to any other child component...] </div> ); }});