Distance Isochrone - JSFiddle

HTML

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<!doctype html>
<html>
  <head>
    <title>Distance Isochrone</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta charset="utf-8" />
​
    <!-- jsFiddle will insert css and js -->
  </head>
  <body>
    <div id="app">
      <div id="selector">
        <div class="select-container">
          <span>mode </span>
          <select id="isochrone-mode-select">
            <option value="driving">Driving</option>
            <option value="walking">Walking</option>
            <option value="cycling">Cycling</option>
          </select>
        </div>
        <div class="select-container">
          <span>method </span>
          <select id="isochrone-method-select">
            <option value="time">Time</option>
            <option value="distance">Distance</option>
          </select>
        </div>
        <div class="select-container">
          <span>value </span>
          <input
            id="isochrone-distance-input"
            type="number"
            value="50"
            min="1"
            max="120"
          />
        </div>
        <div class="select-container">
          <small style="opacity: 0.5; padding: 0 5px"
            >click on the map to change isochrone origin</small
          >
        </div>
      </div>
      <div id="map"></div>
    </div>
​
    <script
      src="https://sdk.woosmap.com/map/map.js?key=woos-48c80350-88aa-333e-835a-07f4b658a9a4&callback=initMap"
      defer
    ></script>
  </body>
</html>
​

JavaScript

Module

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let map;
let methodSelect, modeSelect;
let distanceInput;
let marker;
let polyline;
let distanceService;
const markerIcon = {
  url: "https://images.woosmap.com/icons/pin-red.png",
  scaledSize: {
    height: 38,
    width: 26,
  },
};
const centerLatLng = {
  lat: 51.5,
  lng: -0.234,
};
​
function createMarker(position, icon, map) {
  const marker = new window.woosmap.map.Marker({
    position,
    icon,
  });
​
  marker.setMap(map);
  return marker;
}
​
function initMap() {
  map = new window.woosmap.map.Map(document.getElementById("map"), {
    zoom: 9,
    center: centerLatLng,
  });
  distanceService = new woosmap.map.DistanceService();
  marker = createMarker(centerLatLng, markerIcon, map);
  map.addListener("click", (e) => {
    marker.setMap(null);
    marker = createMarker(e.latlng, markerIcon, map);
    computeIsochrone(e.latlng);
  });
​
  const onChangeHandler = () => {
    computeIsochrone(marker.getPosition().toJSON());
  };
​
  methodSelect = document.getElementById("isochrone-method-select");
  modeSelect = document.getElementById("isochrone-mode-select");
  distanceInput = document.getElementById("isochrone-distance-input");
  methodSelect.addEventListener("change", onChangeHandler);
  modeSelect.addEventListener("change", onChangeHandler);
  distanceInput.addEventListener("change", onChangeHandler);
  computeIsochrone(centerLatLng);
}
​
function computeIsochrone(origin) {
  if (
    parseInt(distanceInput.value) > 120 ||
    parseInt(distanceInput.value) <= 0
  ) {
    alert("Value should be between 1 and 120");
    return;
  }
​
  const isochroneRequest = {
    origin,
    method: methodSelect.value,
    travelMode: modeSelect.value,
    value: parseInt(distanceInput.value),
  };
​
  distanceService
    .getDistanceIsochrone(isochroneRequest)
    .then(displayIsochrone)
    .catch((error) => {
      console.error(error);
    });
}
​
function displayIsochrone(isochrone) {
  if (polyline) {
    polyline.setMap(null);
  }
​
  polyline = new woosmap.map.Polyline({
    path: isochrone.isoline.path || null,
    strokeColor: "#b71c1c",
    strokeOpacity: 0.8,
    strokeWeight: 4,
  });
  polyline.setMap(map);
  fitToCoordinates(isochrone.isoline.path || null);
}
​
function fitToCoordinates(coordinates) {
  const bounds = new woosmap.map.LatLngBounds();
​
  if (coordinates) {
    for (const latlng of coordinates) {
      bounds.extend(latlng);
    }
​
    map.fitBounds(bounds);
  }
}
​
window.initMap = initMap;
​

CSS

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/*
 * Always set the map height explicitly to define the size of the div element
 * that contains the map.
 */
#map {
  height: 100%;
}
​
/*
 * Optional: Makes the sample page fill the window.
 */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica Neue, Arial, Noto Sans, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji;
}
​
#app {
  height: 100%;
}
​
#selector {
  position: absolute;
  top: 0px;
  left: 0;
  background-color: #fff;
  border-radius: 3px;
  box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.1);
  margin: 10px;
  padding: 5px;
  overflow: hidden;
  z-index: 1;
}
​
select {
  width: 100px;
}
​
input {
  width: 92px;
}
​
.select-container {
  padding: 2px 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
}
​
#selector span {
  padding: 0 5px;
}
​
​

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