Change opacity of a TileLayer using range-slider

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07-19-2018 04:13 AM
BulbulMajumder1
New Contributor III

Created TileLayer class as

const fl7 = new TileLayer({
url: "***"
});

Added the TileLayer to the basemap as

var map = new Map({
basemap: app.basemap,
layers: [fl7]
});

Created a range-slider as 

<div class="slidecontainer">
<input type="range" min="1" max="100" value="50" class="slider" id="myRange">
</div>

Now, how can I change the opacity of the TileLayer using the value obtained from slider?

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Accepted Solutions
KenBuja
MVP Honored Contributor

Here's one way to do it, using your slider

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
  <title>Intro to MapView - Create a 2D map - 4.8</title>
  <style>
    html,
    body,
    #viewDiv {
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
    }
  </style>

  <link rel="stylesheet" href="https://js.arcgis.com/4.8/esri/css/main.css">
  <script src="https://js.arcgis.com/4.8/"></script>

  <script>
    require([
      "esri/Map",
      "esri/views/MapView",
      "esri/layers/TileLayer",
      "dojo/domReady!"
    ], function(Map, MapView, TileLayer) {

      var map = new Map({
        basemap: "streets"
      });

      var view = new MapView({
        container: "viewDiv",
        map: map,
        zoom: 4,
        center: [15, 65] // longitude, latitude
      });

      var layer = new TileLayer({
        url: "https://services.arcgisonline.com/arcgis/rest/services/World_Terrain_Base/MapServer"
      });
      map.add(layer);
      layer.opacity = .5

      var slider = document.getElementById("myRange");
      slider.oninput = function() {
        layer.opacity = this.value/100;
      }

    });
  </script>
</head>

<body>
  <div id="viewDiv">
    <div class="slidecontainer">
      <input type="range" min="1" max="100" value="50" class="slider" id="myRange">
    </div>
  </div>
</body>
</html>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

View solution in original post

2 Replies
KenBuja
MVP Honored Contributor

Here's one way to do it, using your slider

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
  <title>Intro to MapView - Create a 2D map - 4.8</title>
  <style>
    html,
    body,
    #viewDiv {
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
    }
  </style>

  <link rel="stylesheet" href="https://js.arcgis.com/4.8/esri/css/main.css">
  <script src="https://js.arcgis.com/4.8/"></script>

  <script>
    require([
      "esri/Map",
      "esri/views/MapView",
      "esri/layers/TileLayer",
      "dojo/domReady!"
    ], function(Map, MapView, TileLayer) {

      var map = new Map({
        basemap: "streets"
      });

      var view = new MapView({
        container: "viewDiv",
        map: map,
        zoom: 4,
        center: [15, 65] // longitude, latitude
      });

      var layer = new TileLayer({
        url: "https://services.arcgisonline.com/arcgis/rest/services/World_Terrain_Base/MapServer"
      });
      map.add(layer);
      layer.opacity = .5

      var slider = document.getElementById("myRange");
      slider.oninput = function() {
        layer.opacity = this.value/100;
      }

    });
  </script>
</head>

<body>
  <div id="viewDiv">
    <div class="slidecontainer">
      <input type="range" min="1" max="100" value="50" class="slider" id="myRange">
    </div>
  </div>
</body>
</html>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

View solution in original post

BulbulMajumder1
New Contributor III

Yes it works. Thank you Ken Buja

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