InputNumber: fix touch one click trigger twice on the window touch pad (#21760)

* fix touch one click trigger twice on the window touch pad

* change var bane

.gitignore

@@ -22,3 +22,4 @@ coverage
 waiter.config.js
 build/bin/algolia-key.js
 .envrc
+.history/

src/directives/repeat-click.js

@@ -1,12 +1,14 @@
 import { once, on } from 'element-ui/src/utils/dom';
+import { isMac } from 'element-ui/src/utils/util';
 
 export default {
   bind(el, binding, vnode) {
     let interval = null;
     let startTime;
+    const maxIntervals = isMac() ? 100 : 300;
     const handler = () => vnode.context[binding.expression].apply();
     const clear = () => {
-      if (Date.now() - startTime < 100) {
+      if (Date.now() - startTime < maxIntervals) {
         handler();
       }
       clearInterval(interval);
@@ -18,7 +20,7 @@ export default {
       startTime = Date.now();
       once(document, 'mouseup', clear);
       clearInterval(interval);
-      interval = setInterval(handler, 100);
+      interval = setInterval(handler, maxIntervals);
     });
   }
 };

src/utils/util.js

@@ -239,3 +239,7 @@ export function objToArray(obj) {
   }
   return isEmpty(obj) ? [] : [obj];
 }
+
+export const isMac = function() {
+  return !Vue.prototype.$isServer && /macintosh|mac os x/i.test(navigator.userAgent);
+};