"pass props from parent to child react functional component" Code Answer's
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react pass prop to parent
//Form (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;
//Input Box (Child)
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;
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> ); }});
Source: medium.com
pass props from parent to child react functional component
import React, { useState } from 'react';
import './App.css';
import Todo from './components/Todo'
function App() {
const [todos, setTodos] = useState([
{
id: 1,
title: 'This is first list'
},
{
id: 2,
title: 'This is second list'
},
{
id: 3,
title: 'This is third list'
},
]);
return (
<div className="App">
<h1></h1>
<Todo todos={todos}/> //This is how i'm passing props in parent component
</div>
);
}
export default App;
function Todo(props) {
return (
<div>
{props.todos.map(todo => { // using props in child component and looping
return (
<h1>{todo.title}</h1>
)
})}
</div>
);
}
class component params in react
<input
type= "text"
value={ this.state.value || "" }
placeholder="Enter Name"
/>
Source: stackoverflow.com
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