code: function processAppSpecifiedMediaRule(allAppTypes, appType, rule) {
      let result = matchAppMediaParams(allAppTypes, appType, rule.params);
      if (!result) {
          return;
      }
  
      let {removed, params} = result;
      params && (params = params.trim());
      if (removed) {
           // remove media rule, not current app media query target
          rule.remove();
      }
      else if (params) {
          // remove current app media query params
          rule.params = params;
      }
      else {
          // remove current app media query rule wrapping
          let children = rule.parent.nodes;
          let currRuleIdx = children.indexOf(rule);
  
          rule.nodes.forEach(item => {
              item.parent = rule.parent; // up parent
  
              let itemRaws = item.raws;
              let subNodes = item.nodes;
  
              // up raw style format
              subNodes && subNodes.forEach(
                  sub => sub.raws.before = itemRaws.before
              );
              itemRaws.before = '\n';
              itemRaws.after = '\n';
          });
  
          children.splice(currRuleIdx, 1, ...rule.nodes);
          rule.nodes = null;
          rule.parent = null;
      }
  }
docs: Process media rule.
  Remove not current app media query target rule.
  Remove current app media query params.
  
  @inner
  @param {Array.<string>} allAppTypes all supported build media target
  @param {string} appType the current build media target
  @param {Object} rule the media query rule