I have the forEachFeatureAtPixel function and try to trigger an event on click on a point layer with a custom icon. However, the performance on touch devices is really bad. I need to click several times until it triggers the event (sometimes it doesn'tdo it at all..) . I also used the moveTolerence feature for the map, but still have the same issues. On mouse click on my desktop PC everything works like a charme. What am I missing to make the performance as smooth as on a desktop PC?

This is my code:

$(document).ready(function() {
map.on('singleclick', function(evt) {
    var feature = map.forEachFeatureAtPixel(evt.pixel, function(feature, layer) {
        return feature;
    }, {hitTolerance:10});
    var layer = map.forEachFeatureAtPixel(evt.pixel, function(feature, layer) {
        return layer;
    }, {hitTolerance: 15});
    if (feature) {
        if (layer === vectorLayerFB) {
            window.open('https://www.example.com', '_blank');
        if (layer === vectorLayerBlog) {
            window.location = 'www.example.com';
  • 1. which version to you use? v3.x.x? 2. have you tried to increase hitTolerance value as 30 something? – Chase Choi Aug 17 '18 at 0:38
  • My ol version is v3.11.2. And yes, I have tried with a higher hitTolerance (20 / 30 / 100). It is always out of 10 clicks only one or two are working. Using Samsung S9+ with chrome but had same issues with a S6 on chrome – JoeBe Aug 17 '18 at 3:07

hitTolerance parameter is introduced with version 3.20.0.
So, it's not working with version 3.11.2 because there's no hitTolerance.
Up-versioning to 3.20.0 will solve your problem.

| improve this answer | |
  • Thanks. Would you suggest me to upgrade to the latest stable version? (If yes, which is it at the moment, if you know?) – JoeBe Aug 17 '18 at 5:26
  • 1
    Since version 5.0, there's huge changes on import things. The last 4.x.x version would be better to use for you. – Chase Choi Aug 17 '18 at 8:31

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