[GitHub] [incubator-echarts] fightGitHub93 commented on issue #12221: Cannot read property 'traverse' of undefined when drawing custom chart

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

fightGitHub93 commented on issue #12221:
URL: https://github.com/apache/incubator-echarts/issues/12221#issuecomment-747826098


   > 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);
   > }
   > },
   > 
   > `我也使用了同样的方式修改了源码，这样是否可行，会不会引起其他的问题？
   


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