Locate and select features by attribute query

In this example, we will locate and select features on the map, for a given postal code.

In the example dataset, we will use the layer “Places”, id=6. We will search on the postal code attribute (CODE_POSTA), and return all places having the given postal code.

Example

Show example in Codepen.io

Postal code:

The code:

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
    <meta charset="UTF-8">
    <style>
      #my-custom-map {
        width: 600px;
        height: 600px;
        border: 1px solid grey;
        margin-top: 1rem;
      }
    </style>
  </head>
  <body class="jmap_wrapper">
    <span>Postal code:&nbsp;</span>
    <input placeholder="Enter postal code" id="postalCode" value="H1A 1T9"/>
    <button
      id="searchButton"
      onclick="alert('The map is loading, try again when the map is displayed on screen')">
      Search features
    </button>
    <div id="my-custom-map"></div>
    <script type="text/javascript">
      const PLACE_LAYER_ID = 6;
      let isSearching = false;
      window.search = () => {
        if (isSearching) {
          return alert("Search in progress, please wait");
        }
        const postalCode = document.getElementById("postalCode").value;
        if (!postalCode) {
          return alert("Please enter a postal code");
        }
        isSearching = true;
        if (!JMap.Layer.isSelectableById(PLACE_LAYER_ID)) {
          JMap.Layer.setSelectabilityById(PLACE_LAYER_ID, true);
        }
        JMap.Layer.Search
          .byAttribute({
            layerId: PLACE_LAYER_ID,
            attributeName: "CODE_POSTA",
            attributeValue: postalCode
          })
          .then(features => {
            console.log("Features", features);
            isSearching = false;
            if (features.length === 0) {
              JMap.Map.Selection.clearLayersSelection([PLACE_LAYER_ID]);
              return alert("No feature found !");
            }
            JMap.Map.Selection.setLayerSelection(PLACE_LAYER_ID, features);
            JMap.Map.fitFeatures(features);
          })
          .catch(error => {
            isSearching = false;
            console.error("An error occured", error);
            alert("An error occured");
          });
      };
      window.JMAP_OPTIONS = {
        projectId: 1,
        restBaseUrl: "https://jmapdoc.jmaponline.net/services/rest/v2.0",
        anonymous: true,
        map: {
          containerId: "my-custom-map",
          zoom: 13.797865986918877,
          center: {
            x: -73.48063889179525,
            y: 45.664231577062765
          }
        },
        onReady: () => {
          JMap.Event.Map.on.mapLoad("my-listener", () => {
            document.getElementById("searchButton").onclick = window.search;
          });
        }
      };
    </script>
    <script defer type="text/javascript" src="https://cdn.jsdelivr.net/npm/jmap-core-js@7_Kathmandu_HF3"></script>  
  </body>
</html>