[GitHub] [incubator-echarts] WenBinWu edited a comment on issue #12221: Cannot read property 'traverse' of undefined when drawing custom chart

[GitBox <gi...@apache.org>]

WenBinWu edited a comment on issue #12221:
URL: https://github.com/apache/incubator-echarts/issues/12221#issuecomment-659186157


   Add some code in function of incrementalRender may fix this issue.
   `
       incrementalRender: function (params, customSeries, ecModel, api, payload) {
           var data = customSeries.getData();
           var renderItem = makeRenderItem(customSeries, data, ecModel, api);
           function setIncrementalAndHoverLayer(el) {
               if (!el.isGroup) {
                   el.incremental = true;
                   el.useHoverLayer = true;
               }
           }
           for (var idx = params.start; idx < params.end; idx++) {
               var el = createOrUpdate$1(null, idx, renderItem(idx, payload), customSeries, this.group, data);
               **if (el)**
                   el.traverse(setIncrementalAndHoverLayer);
           }
       },
   
   `
   


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