map api react code example

Example 1: react map

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

Example 2: map function in react

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

Example 3: npm google map api react

import {Map, InfoWindow, Marker, GoogleApiWrapper} from 'google-maps-react';

export class MapContainer extends Component {
  render() {
    return (
      <Map google={this.props.google} zoom={14}>

        <Marker onClick={this.onMarkerClick}
                name={'Current location'} />

        <InfoWindow onClose={this.onInfoWindowClose}>
            <div>
              <h2>{this.state.selectedPlace.name}</h2>
            </div>
        </InfoWindow>
      </Map>
    );
  }
}

export default GoogleApiWrapper({
  apiKey: (YOUR_GOOGLE_API_KEY_GOES_HERE)
})(MapContainer)

Example 4: @react-google-maps/api npm

npm i -S @react-google-maps/api

Example 5: new Map() collection in react state

function MapComponent(){
  const [myMap, setMyMap] = useState(new Map());
  const updateMap = (k,v) => {
    setMyMap(new Map(myMap.set(k,v)));
  }
  return(
    <ul>
      {[...myMap.keys()].map(k => (
        <li key={k}>myMap.get(k)</li>
      ))}
    </ul>
  );
}

Example 6: react map

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