I can't find any simple way to clone an ol3 style. There is no clone() method and creating a style from a style (new ol.style.Style(style)) doesn't do it. JSON.stringify doesn't produce anything usable, either.

Is there any ol3 code I might be overlooking for cloning styles?


Adapted from ol-debug.js:

var typeOf = function(obj){
    return ({}).toString.call(obj)
function cloneObject(obj){
    var type = typeOf(obj);
    if (type == 'object' || type == 'array') {
        if (obj.clone) {
            return obj.clone();
        var clone = type == 'array' ? [] : {};
        for (var key in obj) {
            clone[key] = cloneObject(obj[key]);
        return clone;
    return obj;
var circle = new ol.style.Style({
    image: new ol.style.Circle({
        radius: 5,
        fill: null,
        stroke: new ol.style.Stroke({
            color: [0,0,0,.9],
            width: 3
var cloned = cloneObject(circle);
  • This would be fine for a JSON object and would probably work but it is unsafe; it's copying methods and internal state; unfortunately, there is also no clone on fill, stroke, etc. – ca0v Aug 18 '15 at 18:27
  • 1
    Actually it does clone fill and stroke - fiddle. – Jonatas Walker Aug 18 '15 at 19:40
  • It does it but they don't have a clone on them. Your code would probably work but it's not the "simple way" I was looking for. – ca0v Aug 19 '15 at 21:14

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