I would like to draw shapes with QGIS2web plugin

According to the query here:

Add OpenLayers3 controls to qgis2web project

I should be able to develop the qgis2web.js file further behind the ol.Map section.

I found a good drawing shapes test for Openlayers here:


from where I picked up the relevant files. I did the following steps:

  1. Linked the essential scripts and csses into my index.html page:

    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
  2. Added, and next linked the following script and css files:

        <link rel="stylesheet" href="./resources/ol3-drawcontrols.css">
        <script src="resources/ol3-controldrawfeatures.js"></script>
  3. Placed the following section:

      var vector_draw = new ol.layer.Vector({
    source: new ol.source.Vector(),
    style: new ol.style.Style({
        fill: new ol.style.Fill({
            color: 'rgba(255, 255, 255, 0.2)'
        stroke: new ol.style.Stroke({
            color: '#ffcc33',
            width: 2
        image: new ol.style.Circle({
            radius: 7,
            fill: new ol.style.Fill({
                color: '#ffcc33'

in the layers.js file

  1. Situated another section:

        var options = {
       "style_buttons" : null, /** @var {string} glyphicon|default */
       "draw": {
        "Point": true,
        "LineString": true,
        "Square": true,
        "Circle": true,
        "Polygon": true

before the

    var layerSwitcher = new ol.control.LayerSwitcher({tipLabel: "Layers"}); 

in the qgis2web.js file

  1. At the finish I placed the following line:

     var buttonsDrawControls = new ol.control.ControlDrawFeatures({vector_draw, options});

but the map is gone.

The console says:

Uncaught TypeError: ol.inherits is not a function at ol3-controldrawfeatures.js:209 at ol3-controldrawfeatures.js:16 at ol3-controldrawfeatures.js:18

which refers to:

at ol3-controldrawfeatures.js 209 ol.inherits(ol.control.ControlDrawFeatures, ol.control.Control); at ol3-controldrawfeatures.js:16 root.ControlDrawFeatures = factory(root.ol); at ol3-controldrawfeatures.js:18 }(this, function(ol) {

The similar problem was raised here:

ol.inherits in OpenLayers 6

Uncaught TypeError: Cannot set property 'Ending' of undefined at new ol.control.ControlDrawFeatures (ol3-controldrawfeatures.js:24) at qgis2web.js:135

which refers to:

at ol3-controldrawfeatures options.draw.Ending = true;

at qgis2web.js var buttonsDrawControls = new ol.control.ControlDrawFeatures({vector_draw, options});


After expanding the draw.on('drawend', function

  function(evt) {
    measureTooltipElement.className = 'tooltip tooltip-static';
    measureTooltip.setOffset([0, -7]);
    // unset sketch
    sketch = null;
    // unset tooltip so that a new one can be created
    measureTooltipElement = null;
  }, this);
 var value = typeSelect.value;
    if (value === 'None'){
    } else {
        var geometryFunction;
        if(value !== 'None' && value !== 'Square' && value !== 'Box') {
            draw = new ol.interaction.Draw({
                source: sourcedraw,
                type: /** @type {ol.geom.GeometryType} */ (typeSelect.value)
        } else if(value === 'Square'){
            value = 'Circle';
            geometryFunction = ol.interaction.Draw.createRegularPolygon(4);
            draw = new ol.interaction.Draw({
                source: sourcedraw,
                type: /** @type {ol.geom.GeometryType} */ (value),
                geometryFunction: geometryFunction
        } else if(value === 'Box'){
            value = 'Circle';
            geometryFunction = ol.interaction.Draw.createBox();
            draw = new ol.interaction.Draw({
                source: sourcedraw,
                type: /** @type {ol.geom.GeometryType} */ (value),
                geometryFunction: geometryFunction

I still get an error:

Uncaught TypeError: ol.inherits is not a function at ol3-controldrawfeatures.js:209 at ol3-controldrawfeatures.js:16 at ol3-controldrawfeatures.js:18

The full code to my map is available here

What have I done wrong?

IInd approach

I used another code, which seems to be even better than the first one. Basically i am able to draw all the features except of the rectangle.

where after the selection my cursour is sticked to the map dragging it unless I leave the map canvas completely.

After implementation to my JavaScript file, which you can find below:


I am getting an error:

Uncaught TypeError: Cannot read properties of null (reading 'getGeometry') at e.modifyDrawing_ (Draw.js:688) at e.handlePointerMove_ (Draw.js:590) at e.handleEvent (Draw.js:495) at e.handleMapBrowserEvent (PluggableMap.js:846) at e.dispatchEvent (Target.js:115) at e.relayEvent_ (MapBrowserEventHandler.js:230)

referring me to the draw.js file, which i can find anywhere in my Qgis2web map repositories.

The issue is very similar to this thread:


enter image description here

how can I fix this problem? Is there something I could change easily? I tried to change

var rectangleInteraction = new ol.interaction.Draw({
type: 'LineString',

to type: 'Polygon' but it's still the same.

  • 1
    Without seeing the complete code as it is (not only isolated excerpts), it all would be just guessing. Any errors in the browser debugger console?
    – TomazicM
    Commented Nov 12, 2020 at 18:14
  • @TomazicM you are right. I should have to see the console. I did it now. My query has been updated.
    – Geographos
    Commented Nov 13, 2020 at 8:48
  • It looks like the OL version you are using is not the right one for ol3-controldrawfeatures.js you are trying to use. Try replacing your current version of OL with version the example above is using: cdnjs.cloudflare.com/ajax/libs/ol3/3.14.0/ol.css and cdnjs.cloudflare.com/ajax/libs/ol3/3.14.0/ol.js
    – TomazicM
    Commented Sep 14, 2021 at 14:46
  • And you should put <script src="./resources/ol3-controldrawfeatures.js"></script> before <script src="./resources/qgis2web.js"></script>.
    – TomazicM
    Commented Sep 14, 2021 at 14:52
  • @TomazicM could you explain to me why in the 2nd example I constantly get the error cannot read properties or null? I have completely no idea how to fix it.
    – Geographos
    Commented Sep 14, 2021 at 15:11

1 Answer 1


The deprecated ol.inherits method is easy to add back

<script src="./resources/ol.js"></script>
  ol.inherits = function(child,parent) {
    child.prototype = Object.create(parent.prototype);
    child.prototype.constructor = child;

But there is no guarantee that old third party add-ons will work with later versions of OpenLayers than they were designed for as there have been many other changes between version 3 and 6.

  • OK, thank you. I will check tomorrow. However, I shouldn't worry about the changes between OpenLayers 3 and 6. The QGIS2Web plugin still works at 3.0 I guess, as all the files are dated back to Oct 2020.
    – Geographos
    Commented Sep 14, 2021 at 20:08
  • Unnfortunatey it doesn't work. Instead of it I am getting error: ol3-controldrawfeatures.js:1 Failed to load resource: net::ERR_FILE_NOT_FOUND
    – Geographos
    Commented Sep 21, 2021 at 8:30

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