I have a lot of data, when I config field and click apply button, the chrome console show "Cannot read property 'uniqueName' of undefined", thank you for helping me out.

Hello,
Thank you for writing to us.
Could you please provide us with the code example where the issue is reproducible?
That will help us a lot to find a suitable solution for you.
Waiting to hear from you.
Regards,
WebDataRocks Team

code is as sample as below, the key is the data, which cause error when data size is greater than 1100. the column whose value is unique to be chosen as row or column will reproduce . 

this.pivot = new WebDataRocks({
      container: "#wdr-component",
      toolbar: true,
      report: {
          data: this.holdingListData,
          slice: {
            expands: {
                expandAll: true
            }
          }
      },
      global: {
          localization: "/static/webdatarocks/loc/cn.json"
      }
  });

Hello,
Thank you for posting additional details.

If you exceed the limit of 1 MB, we recommend considering Flexmonster which is a premium pivot table component developed by the same team. It does not have such limitation.
Hope it helps.
 
Regards,
WebDataRocks Team