fix: selecting events in chrome (jquense#884)

* fix selecting events in chrome

* add comment.

Author: shundy

src/Selection.js

@@ -322,6 +322,12 @@ class Selection {
       top = Math.min(pageY, y),
       old = this.selecting
 
+    // Prevent emitting selectStart event until mouse is moved.
+    // in Chrome on Windows, mouseMove event may be fired just after mouseDown event.
+    if (!old && !(w || h)) {
+      return
+    }
+
     this.selecting = true
     this._selectRect = {
       top,