feature(dom) touchstart: set passive listener

https://github.com/WICG/EventListenerOptions/blob/gh-pages/explainer.md

client/dom/events.js

@@ -7,6 +7,15 @@ module.exports = new EventsProto();
 function EventsProto() {
     const Events = this;
     
+    const getEventOptions = (eventName) => {
+        if (eventName !== 'touchstart')
+            return false;
+        
+        return {
+            passive: true
+        };
+    };
+    
     function parseArgs(eventName, element, listener, callback) {
         let isFunc;
         const args = [
@@ -47,7 +56,7 @@ function EventsProto() {
             callback(element, [
                 eventName,
                 listener,
-                false
+                getEventOptions(eventName),
             ]);
             break;
         

client/listeners/index.js

@@ -61,7 +61,7 @@ const EventsFiles = {
     ]),
     dragstart: exec.with(execIfNotUL, onDragStart),
     dblclick: exec.with(execIfNotUL, onDblClick),
-    touchstart: exec.with(execIfNotUL, onTouch)
+    touchstart: exec.with(execIfNotUL, onTouch),
 };
 
 let EXT;
@@ -292,8 +292,6 @@ function onTouch(event) {
     CloudCmd.loadDir({
         path: DOM.getCurrentPath(current)
     });
-    
-    event.preventDefault();
 }
 
 /*