Function makeValueReadable

_benchmarks/sample_echarts.js:16473–16505

* Make value user readable for tooltip and label. * "User readable": * Try to not print programmer-specific text like NaN, Infinity, null, undefined. * Avoid to display an empty string, which users can not recognize there is * a value and it might look like a bug.

(value, valueType, useUTC)

     */

    function makeValueReadable(value, valueType, useUTC) {
      var USER_READABLE_DEFUALT_TIME_PATTERN = '{yyyy}-{MM}-{dd} {hh}:{mm}:{ss}';

      function stringToUserReadable(str) {
        return str && trim(str) ? str : '-';
      }

      function isNumberUserReadable(num) {
        return !!(num != null && !isNaN(num) && isFinite(num));
      }

      var isTypeTime = valueType === 'time';
      var isValueDate = value instanceof Date;

      if (isTypeTime || isValueDate) {
        var date = isTypeTime ? parseDate(value) : value;

        if (!isNaN(+date)) {
          return format(date, USER_READABLE_DEFUALT_TIME_PATTERN, useUTC);
        } else if (isValueDate) {
          return '-';
        } // In other cases, continue to try to display the value in the following code.

      }

      if (valueType === 'ordinal') {
        return isStringSafe(value) ? stringToUserReadable(value) : isNumber(value) ? isNumberUserReadable(value) ? value + '' : '-' : '-';
      } // By default.


      var numericResult = numericToNumber(value);
      return isNumberUserReadable(numericResult) ? addCommas(numericResult) : isStringSafe(value) ? stringToUserReadable(value) : '-';
    }
    var TPL_VAR_ALIAS = ['a', 'b', 'c', 'd', 'e', 'f', 'g'];

    var wrapVar = function (varName, seriesIdx) {