function range(rule, value, source, errors, options) {
  const len = typeof rule.len === 'number';
  const min = typeof rule.min === 'number';
  const max = typeof rule.max === 'number';
  // 正则匹配码点范围从U+010000一直到U+10FFFF的文字（补充平面Supplementary Plane）
  const spRegexp = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g;
  let val = value;
  let key = null;
  const num = typeof (value) === 'number';
  const str = typeof (value) === 'string';
  const arr = Array.isArray(value);
  if (num) {
    key = 'number';
  } else if (str) {
    key = 'string';
  } else if (arr) {
    key = 'array';
  }
  // if the value is not of a supported type for range validation
  // the validation rule rule should use the
  // type property to also test for a particular type
  if (!key) {
    return false;
  }
  if (arr) {
    val = value.length;
  }
  if (str) {
    // 处理码点大于U+010000的文字length属性不准确的bug，如"𠮷𠮷𠮷".lenght !== 3
    val = value.replace(spRegexp, '_').length;
  }
  if (len) {
    if (val !== rule.len) {
      errors.push(util.format(options.messages[key].len, rule.fullField, rule.len));
    }
  } else if (min && !max && val < rule.min) {
    errors.push(util.format(options.messages[key].min, rule.fullField, rule.min));
  } else if (max && !min && val > rule.max) {
    errors.push(util.format(options.messages[key].max, rule.fullField, rule.max));
  } else if (min && max && (val < rule.min || val > rule.max)) {
    errors.push(util.format(options.messages[key].range,
      rule.fullField, rule.min, rule.max));
  }
}
function range(rule, value, source, errors, options) {
  const len = typeof rule.len === 'number';
  const min = typeof rule.min === 'number';
  const max = typeof rule.max === 'number';
  
  const spRegexp = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g;
  let val = value;
  let key = null;
  const num = typeof (value) === 'number';
  const str = typeof (value) === 'string';
  const arr = Array.isArray(value);
  if (num) {
    key = 'number';
  } else if (str) {
    key = 'string';
  } else if (arr) {
    key = 'array';
  }
  
  
  
  if (!key) {
    return false;
  }
  if (arr) {
    val = value.length;
  }
  if (str) {
    
    val = value.replace(spRegexp, '_').length;
  }
  if (len) {
    if (val !== rule.len) {
      errors.push(util.format(options.messages[key].len, rule.fullField, rule.len));
    }
  } else if (min && !max && val < rule.min) {
    errors.push(util.format(options.messages[key].min, rule.fullField, rule.min));
  } else if (max && !min && val > rule.max) {
    errors.push(util.format(options.messages[key].max, rule.fullField, rule.max));
  } else if (min && max && (val < rule.min || val > rule.max)) {
    errors.push(util.format(options.messages[key].range,
      rule.fullField, rule.min, rule.max));
  }
}
function range ( rule , value , source , errors , options ) { const len = typeof rule . len === 'number' ; const min = typeof rule . min === 'number' ; const max = typeof rule . max === 'number' ; // 正则匹配码点范围从U+010000一直到U+10FFFF的文字（补充平面Supplementary Plane） const spRegexp = / [\uD800-\uDBFF][\uDC00-\uDFFF] / g ; let val = value ; let key = null ; const num = typeof ( value ) === 'number' ; const str = typeof ( value ) === 'string' ; const arr = Array . isArray ( value ) ; if ( num ) { key = 'number' ; } else if ( str ) { key = 'string' ; } else if ( arr ) { key = 'array' ; } // if the value is not of a supported type for range validation // the validation rule rule should use the // type property to also test for a particular type if ( ! key ) { return false ; } if ( arr ) { val = value . length ; } if ( str ) { // 处理码点大于U+010000的文字length属性不准确的bug，如"𠮷𠮷𠮷".lenght !== 3 val = value . replace ( spRegexp , '_' ) . length ; } if ( len ) { if ( val !== rule . len ) { errors . push ( util . format ( options . messages [ key ] . len , rule . fullField , rule . len ) ) ; } } else if ( min && ! max && val < rule . min ) { errors . push ( util . format ( options . messages [ key ] . min , rule . fullField , rule . min ) ) ; } else if ( max && ! min && val > rule . max ) { errors . push ( util . format ( options . messages [ key ] . max , rule . fullField , rule . max ) ) ; } else if ( min && max && ( val < rule . min || val > rule . max ) ) { errors . push ( util . format ( options . messages [ key ] . range , rule . fullField , rule . min , rule . max ) ) ; } }
Rule for validating minimum and maximum allowed values.

@param rule The validation rule.
@param value The value of the field on the source object.
@param source The source object being validated.
@param errors An array of errors that this rule may add
validation errors to.
@param options The validation options.
@param options.messages The validation messages.
Rule for validating minimum and maximum allowed values .