Fixed an issue that transpiled + (++v) + to +++v+ after code mini…

…fication

dist/infinite-tree.js

@@ -1,4 +1,4 @@
-/*! infinite-tree v1.13.1 | (c) 2017 Cheton Wu <[email protected]> | MIT | https://github.com/cheton/infinite-tree */
+/*! infinite-tree v1.13.2 | (c) 2017 Cheton Wu <[email protected]> | MIT | https://github.com/cheton/infinite-tree */
 (function webpackUniversalModuleDefinition(root, factory) {
 	if(typeof exports === 'object' && typeof module === 'object')
 		module.exports = factory();
@@ -3301,7 +3301,8 @@ var getIEVersion = exports.getIEVersion = function getIEVersion() {
 
     var v = 3;
     do {
-        div.innerHTML = '<!--[if gt IE ' + ++v + ']><i></i><![endif]-->';
+        ++v;
+        div.innerHTML = '<!--[if gt IE ' + v + ']><i></i><![endif]-->';
     } while (all[0]);
 
     return v > 4 ? v : document.documentMode;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "infinite-tree",
-  "version": "1.13.1",
+  "version": "1.13.2",
   "description": "A browser-ready tree library that can efficiently display a large amount of data using infinite scrolling.",
   "homepage": "https://github.com/cheton/infinite-tree",
   "main": "lib/index.js",

src/browser.js

@@ -5,7 +5,8 @@ export const getIEVersion = () => {
 
     let v = 3;
     do {
-        div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->';
+        ++v;
+        div.innerHTML = '<!--[if gt IE ' + v + ']><i></i><![endif]-->';
     } while (all[0]);
 
     return v > 4 ? v : document.documentMode;