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add simple ECL compatibility example
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‎examples/ecl-compat/README.md

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# Basic Google Maps Setup Example
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![image](https://user-images.githubusercontent.com/39244966/208682692-d5b23518-9e51-4a87-8121-29f71e41c777.png)
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This is an example to show how to setup a simple Google Maps Map with the `<Map/>` component of the Google Maps React
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library.
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## Google Maps API key
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This example does not come with an API key. Running the examples locally requires a valid API key for the Google Maps Platform.
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See [the official documentation][get-api-key] on how to create and configure your own key.
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The API key has to be provided via an environment variable `GOOGLE_MAPS_API_KEY`. This can be done by creating a
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file named `.env` in the example directory with the following content:
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```shell title=".env"
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GOOGLE_MAPS_API_KEY="<YOUR API KEY HERE>"
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```
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If you are on the CodeSandbox playground you can also choose to [provide the API key like this](https://codesandbox.io/docs/learn/environment/secrets)
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## Development
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Go into the example-directory and run
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```shell
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npm install
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```
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To start the example with the local library run
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```shell
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npm run start-local
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```
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The regular `npm start` task is only used for the standalone versions of the example (CodeSandbox for example)
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[get-api-key]: https://developers.google.com/maps/documentation/javascript/get-api-key

‎examples/ecl-compat/index.html

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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta
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name="viewport"
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content="width=device-width, initial-scale=1.0, user-scalable=no" />
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<title>Example:</title>
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<style>
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body {
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margin: 0;
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font-family: sans-serif;
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}
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#app {
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width: 100vw;
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height: 100vh;
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}
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</style>
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</head>
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<body>
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<div id="app"></div>
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<script type="module">
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import '@vis.gl/react-google-maps/examples.css';
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import '@vis.gl/react-google-maps/examples.js';
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import {renderToDom} from './src/app';
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renderToDom(document.querySelector('#app'));
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</script>
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</body>
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</html>

‎examples/ecl-compat/package.json

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{
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"type": "module",
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"dependencies": {
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"@googlemaps/extended-component-library": "^0.6.9",
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"@vis.gl/react-google-maps": "latest",
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"react": "^18.2.0",
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"react-dom": "^18.2.0",
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"vite": "^5.0.4"
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},
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"scripts": {
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"start": "vite",
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"start-local": "vite --config ../vite.config.local.js",
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"build": "vite build"
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}
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}

‎examples/ecl-compat/src/app.tsx

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import React from 'react';
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import {createRoot} from 'react-dom/client';
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import {APIProvider, Map} from '@vis.gl/react-google-maps';
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import {RouteOverview} from '@googlemaps/extended-component-library/react';
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import ControlPanel from './control-panel';
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const API_KEY =
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globalThis.GOOGLE_MAPS_API_KEY ?? (process.env.GOOGLE_MAPS_API_KEY as string);
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const App = () => (
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<APIProvider apiKey={API_KEY} version={'beta'}>
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<Map
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mapId={'49ae42fed52588c3'}
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defaultCenter={{lat: 53.55, lng: 10.05}}
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defaultZoom={10}
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gestureHandling={'greedy'}
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disableDefaultUI={true}>
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<RouteOverview
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originAddress={'Little Island, New York'}
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destinationAddress={'Times Square Plaza, New York'}
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travelMode={'walking'}
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noPin></RouteOverview>
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</Map>
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<ControlPanel />
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</APIProvider>
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);
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export default App;
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export function renderToDom(container: HTMLElement) {
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const root = createRoot(container);
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root.render(
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<React.StrictMode>
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<App />
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</React.StrictMode>
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);
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}

‎examples/ecl-compat/src/control-panel.tsx

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import * as React from 'react';
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function ControlPanel() {
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return (
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<div className="control-panel">
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<h3>Example Template</h3>
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<p>
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Add a brief description of the example here and update the link below
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</p>
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<div className="links">
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<a
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href="https://codesandbox.io/s/github/visgl/react-google-maps/tree/main/examples/_template"
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target="_new">
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Try on CodeSandbox ↗
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</a>
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<a
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href="https://github.com/visgl/react-google-maps/tree/main/examples/_template"
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target="_new">
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View Code ↗
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</a>
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</div>
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</div>
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);
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}
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export default React.memo(ControlPanel);

‎examples/ecl-compat/vite.config.js

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import {defineConfig, loadEnv} from 'vite';
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export default defineConfig(({mode}) => {
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const {GOOGLE_MAPS_API_KEY = ''} = loadEnv(mode, process.cwd(), '');
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return {
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define: {
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'process.env.GOOGLE_MAPS_API_KEY': JSON.stringify(GOOGLE_MAPS_API_KEY)
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},
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resolve: {
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alias: {
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'@vis.gl/react-google-maps/examples.js':
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'https://visgl.github.io/react-google-maps/scripts/examples.js'
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}
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}
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};
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});

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