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Update MarkerClusterer.md to not use index as key #748

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Mar 25, 2020
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Update MarkerClusterer.md to not use index as key #748

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94 changes: 44 additions & 50 deletions packages/react-google-maps-api/src/components/addons/MarkerClusterer.md
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Original file line number Diff line number Diff line change
@@ -1,63 +1,57 @@
# MarkerClusterer example

```jsx
const { GoogleMap, LoadScript, MarkerClusterer, Marker } = require("../../");
const ScriptLoaded = require("../../docs/ScriptLoaded").default;
const { GoogleMap, LoadScript, MarkerClusterer, Marker } = require('../../')
const ScriptLoaded = require('../../docs/ScriptLoaded').default

const mapContainerStyle = {
height: "400px",
width: "800px"
};
height: '400px',
width: '800px',
}

const center = { lat: -28.024, lng: 140.887 };
const center = { lat: -28.024, lng: 140.887 }

const locations = [
{lat: -31.563910, lng: 147.154312},
{lat: -33.718234, lng: 150.363181},
{lat: -33.727111, lng: 150.371124},
{lat: -33.848588, lng: 151.209834},
{lat: -33.851702, lng: 151.216968},
{lat: -34.671264, lng: 150.863657},
{lat: -35.304724, lng: 148.662905},
{lat: -36.817685, lng: 175.699196},
{lat: -36.828611, lng: 175.790222},
{lat: -37.750000, lng: 145.116667},
{lat: -37.759859, lng: 145.128708},
{lat: -37.765015, lng: 145.133858},
{lat: -37.770104, lng: 145.143299},
{lat: -37.773700, lng: 145.145187},
{lat: -37.774785, lng: 145.137978},
{lat: -37.819616, lng: 144.968119},
{lat: -38.330766, lng: 144.695692},
{lat: -39.927193, lng: 175.053218},
{lat: -41.330162, lng: 174.865694},
{lat: -42.734358, lng: 147.439506},
{lat: -42.734358, lng: 147.501315},
{lat: -42.735258, lng: 147.438000},
{lat: -43.999792, lng: 170.463352}
];
{ lat: -31.56391, lng: 147.154312 },
{ lat: -33.718234, lng: 150.363181 },
{ lat: -33.727111, lng: 150.371124 },
{ lat: -33.848588, lng: 151.209834 },
{ lat: -33.851702, lng: 151.216968 },
{ lat: -34.671264, lng: 150.863657 },
{ lat: -35.304724, lng: 148.662905 },
{ lat: -36.817685, lng: 175.699196 },
{ lat: -36.828611, lng: 175.790222 },
{ lat: -37.75, lng: 145.116667 },
{ lat: -37.759859, lng: 145.128708 },
{ lat: -37.765015, lng: 145.133858 },
{ lat: -37.770104, lng: 145.143299 },
{ lat: -37.7737, lng: 145.145187 },
{ lat: -37.774785, lng: 145.137978 },
{ lat: -37.819616, lng: 144.968119 },
{ lat: -38.330766, lng: 144.695692 },
{ lat: -39.927193, lng: 175.053218 },
{ lat: -41.330162, lng: 174.865694 },
{ lat: -42.734358, lng: 147.439506 },
{ lat: -42.734358, lng: 147.501315 },
{ lat: -42.735258, lng: 147.438 },
{ lat: -43.999792, lng: 170.463352 },
]

const options = {
imagePath:"https://developers.google.com/maps/documentation/javascript/examples/markerclusterer/m"
};
const options = {
imagePath:
'https://developers.google.com/maps/documentation/javascript/examples/markerclusterer/m',
}

<ScriptLoaded>
<GoogleMap
id="marker-example"
mapContainerStyle={mapContainerStyle}
zoom={3}
center={center}
>
<MarkerClusterer
options={options}
>
{
(clusterer) => locations.map((location, i) => (
<Marker
key={i}
position={location}
clusterer={clusterer}
/>
function createKey(location: { lat: number, lng: number }): React.ReactText {
return location.lat + location.lng
}

;<ScriptLoaded>
<GoogleMap id='marker-example' mapContainerStyle={mapContainerStyle} zoom={3} center={center}>
<MarkerClusterer options={options}>
{clusterer =>
locations.map(location => (
<Marker key={createKey(location)} position={location} clusterer={clusterer} />
))
}
</MarkerClusterer>
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