Function getDataItemValue

_benchmarks/sample_echarts.js:7283–7285

* The method do not ensure performance. * data could be [12, 2323, {value: 223}, [1221, 23], {value: [2, 23]}] * This helper method retieves value from data.

(dataItem)

     */

    function getDataItemValue(dataItem) {
      return isObject(dataItem) && !isArray(dataItem) && !(dataItem instanceof Date) ? dataItem.value : dataItem;
    }
    /**
     * data could be [12, 2323, {value: 223}, [1221, 23], {value: [2, 23]}]
     * This helper method determine if dataItem has extra option besides value