JAVASCRIPT

react map

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

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>
);

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);

react map example leaflets

<style>.leaflet-container {    height: 400px;    width: 800px;}</style>

react map example leaflets

<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/leaflet/1.3.1/leaflet.css">