JAVASCRIPT

react map

{array.map((item)=>{
  return (
    <div key={item.id}>I am one Object in the Array {item}</div>
  )
})}

map function in react

function NameList() {
	const names = ['Bruce', 'Clark', 'Diana']
    return (
    	<div>
      {names.map(name => <h2>{name}</h2>)}
      	</div>
    )
}

map method in react

function ShowName() {
  const userNames = ["Kunal", "Braj", "Sagar", "Akshay"];
  
  return (
    <>
      <div>
            { 
              
              userNames.map((elem) => {
              <h1>{elem}</h1>
              })
            
            }
          </div> 
    </>
  );
}

export default ShowName;

react map component in

render() {
	return (
      	// using a arrow function get the looping item and it's index (i)
		this.state.data.map((item, i) => {
		  <li key={i}>Test</li>
		})
	);
}

Use of map in react

const todoItems = [
  {
    id: 1,
    text:"todo 1"
  },
  {
    id: 2,
    text:"todo 3"
  },
  {
    id: 3,
    text:"todo 3"
  }
];
const todoItems = todos.map((todo) =>
  <li key={todo.id}>
    {todo.text}
  </li>
);

map in react

const array={{firstName:"x", lastName:"y"},{firstName:"a", lastName:"b"}}

// Method 1: Without using "{}"
array.map((item)=>(
  <ComponentName fName={item.firstName} lName={item.lastName} />
));

// Method 2: With using "{}"
array.map((item)=>{
  return(<ComponentName fName={item.firstName} lName={item.lastName} />)
});

react map

import React from 'react';   
import ReactDOM from 'react-dom';   
  
function NameList(props) {  
  const myLists = props.myLists;  
  const listItems = myLists.map((myList) =>  
    <li>{myList}</li>  
  );  
  return (  
    <div>  
          <h2>React Map Example</h2>  
              <ul>{listItems}</ul>  
    </div>  
  );  
}  
const myLists = ['A', 'B', 'C', 'D', 'D'];   
ReactDOM.render(  
  <NameList myLists={myLists} />,  
  document.getElementById('app')  
);  
export default App;  

map react

const numbers = [1, 2, 3, 4, 5];
const doubled = numbers.map((number) => number * 2);
console.log(doubled);