diff --git a/bower.json b/bower.json
index 2e1818d..d5195c3 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "lf-ng-md-file-input",
-  "version": "1.5.2",
+  "version": "1.5.3",
   "authors": [
     "shuyu <lfshuyu@gmail.com>"
   ],
diff --git a/dist/lf-ng-md-file-input.js b/dist/lf-ng-md-file-input.js
index 98f6498..5901cc8 100644
--- a/dist/lf-ng-md-file-input.js
+++ b/dist/lf-ng-md-file-input.js
@@ -329,7 +329,7 @@
                     }
                     var boolValid = true;
                     modelValue.every(function(obj,idx){
-                        if(obj.lfFile.type.match(reg)){
+                         if(obj.lfFile !== undefined && obj.lfFile.type.match(reg)){
                             return true;
                         }else{
                             boolValid = false;
@@ -681,9 +681,12 @@
 
                         var isFileAreadyExist = false;
 
-                        scope.lfFiles.every(function(obj,idx){
+                         scope.lfFiles.every(function(obj,idx){
                             var lfFile = obj.lfFile;
-							if(lfFile.name == file.name) {
+                            if(obj.isRemote) {
+                                return true;
+                            }
+							if(lfFile.name !== undefined && lfFile.name == file.name) {
 								if(lfFile.size == file.size) {
                                     if(lfFile.lastModified == file.lastModified) {
                                         isFileAreadyExist = true;
diff --git a/dist/lf-ng-md-file-input.min.js b/dist/lf-ng-md-file-input.min.js
index 5db4ce6..767b3d9 100644
--- a/dist/lf-ng-md-file-input.min.js
+++ b/dist/lf-ng-md-file-input.min.js
@@ -1 +1 @@
-!function(e,i,n){"use strict";var t=function(){return"lfobjyxxxxxxxx".replace(/[xy]/g,function(e){var i=16*Math.random()|0,n="x"==e?i:3&i|8;return n.toString(16)})},l=function(e){var i=e.type,n=e.name;return o(i,n)?"image":r(i,n)?"video":s(i,n)?"audio":"object"},o=function(e,i){return!(!e.match("image.*")&&!i.match(/\.(gif|png|jpe?g)$/i))},r=function(e,i){return!(!e.match("video.*")&&!i.match(/\.(og?|mp4|webm|3gp)$/i))},s=function(e,i){return!(!e.match("audio.*")&&!i.match(/\.(ogg|mp3|wav)$/i))},a=function(i){var n={key:t(),lfFile:i,lfFileName:i.name,lfFileType:i.type,lfTagType:l(i),lfDataUrl:e.URL.createObjectURL(i),isRemote:!1};return n},f=function(e,i,n){var o={name:i,type:n},r={key:t(),lfFile:void 0,lfFileName:i,lfFileType:n,lfTagType:l(o),lfDataUrl:e,isRemote:!0};return r},c=i.module("lfNgMdFileInput",["ngMaterial"]);c.directive("lfFile",function(){return{restrict:"E",scope:{lfFileObj:"=",lfUnknowClass:"="},link:function(e,i,n){var t=e.lfFileObj.lfDataUrl,l=e.lfFileObj.lfFileType,o=e.lfFileObj.lfTagType,r=e.lfUnknowClass;switch(o){case"image":i.replaceWith('<img src="'+t+'" />');break;case"video":i.replaceWith('<video controls><source src="'+t+'""></video>');break;case"audio":i.replaceWith('<audio controls><source src="'+t+'""></audio>');break;default:void 0==e.lfFileObj.lfFile&&(l="unknown/unknown"),i.replaceWith('<object type="'+l+'" data="'+t+'"><div class="lf-ng-md-file-input-preview-default"><md-icon class="lf-ng-md-file-input-preview-icon '+r+'"></md-icon></div></object>')}}}}),c.run(["$templateCache",function(e){e.put("lfNgMdFileinput.html",['<div layout="column" class="lf-ng-md-file-input" ng-model="'+t()+'">','<div layout="column" class="lf-ng-md-file-input-preview-container" ng-class="{\'disabled\':isDisabled}" ng-show="isDrag || (isPreview && lfFiles.length)">','<md-button aria-label="remove all files" class="close lf-ng-md-file-input-x" ng-click="removeAllFiles($event)" ng-hide="!lfFiles.length || !isPreview" >&times;</md-button>','<div class="lf-ng-md-file-input-drag">','<div layout="row" layout-align="center center" class="lf-ng-md-file-input-drag-text-container" ng-show="(!lfFiles.length || !isPreview) && isDrag">','<div class="lf-ng-md-file-input-drag-text">{{strCaptionDragAndDrop}}</div>',"</div>",'<div class="lf-ng-md-file-input-thumbnails" ng-if="isPreview == true">','<div class="lf-ng-md-file-input-frame" ng-repeat="lffile in lfFiles" ng-click="onFileClick(lffile)">','<div class="lf-ng-md-file-input-x" aria-label="remove {{lffile.lFfileName}}" ng-click="removeFile(lffile,$event)">&times;</div>','<lf-file lf-file-obj="lffile" lf-unknow-class="strUnknowIconCls"/>','<div class="lf-ng-md-file-input-frame-footer">','<div class="lf-ng-md-file-input-frame-caption">{{lffile.lfFileName}}</div>',"</div>","</div>","</div>",'<div class="clearfix" style="clear:both"></div>',"</div>","</div>",'<div layout="row" class="lf-ng-md-file-input-container" >','<div class="lf-ng-md-file-input-caption" layout="row" layout-align="start center" flex ng-class="{\'disabled\':isDisabled}" >','<md-icon class="lf-icon" ng-class="strCaptionIconCls"></md-icon>','<div flex class="lf-ng-md-file-input-caption-text-default" ng-show="!lfFiles.length">',"{{strCaptionPlaceholder}}","</div>",'<div flex class="lf-ng-md-file-input-caption-text" ng-hide="!lfFiles.length">','<span ng-if="isCustomCaption">{{strCaption}}</span>','<span ng-if="!isCustomCaption">','{{ lfFiles.length == 1 ? lfFiles[0].lfFileName : lfFiles.length+" files selected" }}',"</span>","</div>",'<md-progress-linear md-mode="determinate" value="{{floatProgress}}" ng-show="intLoading && isProgress"></md-progress-linear>',"</div>",'<md-button aria-label="remove all files" ng-disabled="isDisabled" ng-click="removeAllFiles()" ng-hide="!lfFiles.length || intLoading" class="md-raised lf-ng-md-file-input-button lf-ng-md-file-input-button-remove" ng-class="strRemoveButtonCls">','<md-icon class="lf-icon" ng-class="strRemoveIconCls"></md-icon> ',"{{strCaptionRemove}}","</md-button>",'<md-button aria-label="submit" ng-disabled="isDisabled" ng-click="onSubmitClick()" class="md-raised md-warn lf-ng-md-file-input-button lf-ng-md-file-input-button-submit" ng-class="strSubmitButtonCls" ng-show="lfFiles.length && !intLoading && isSubmit">','<md-icon class="lf-icon" ng-class="strSubmitIconCls"></md-icon> ',"{{strCaptionSubmit}}","</md-button>",'<md-button aria-label="browse" ng-disabled="isDisabled" ng-click="openDialog($event, this)" class="md-raised lf-ng-md-file-input-button lf-ng-md-file-input-button-brower" ng-class="strBrowseButtonCls">','<md-icon class="lf-icon" ng-class="strBrowseIconCls"></md-icon> ',"{{strCaptionBrowse}}",'<input type="file" aria-label="{{strAriaLabel}}" accept="{{accept}}" ng-disabled="isDisabled" class="lf-ng-md-file-input-tag" />',"</md-button>","</div>","</div>"].join(""))}]),c.filter("lfTrusted",["$sce",function(e){return function(i){return e.trustAsResourceUrl(i)}}]),c.directive("lfRequired",function(){return{restrict:"A",require:"ngModel",link:function(e,i,n,t){t&&(t.$validators.required=function(e,i){return e?e.length>0:!1})}}}),c.directive("lfMaxcount",function(){return{restrict:"A",require:"ngModel",link:function(e,i,n,t){if(t){var l=-1;n.$observe("lfMaxcount",function(e){var i=parseInt(e,10);l=isNaN(i)?-1:i,t.$validate()}),t.$validators.maxcount=function(e,i){return e?e.length<=l:!1}}}}}),c.directive("lfFilesize",function(){return{restrict:"A",require:"ngModel",link:function(e,i,n,t){if(t){var l=-1;n.$observe("lfFilesize",function(e){var i=/^[1-9][0-9]*(Byte|KB|MB)$/;if(i.test(e)){var n=["Byte","KB","MB"],o=e.match(i)[1],r=e.substring(0,e.indexOf(o));n.every(function(e,i){return o===e?(l=parseInt(r)*Math.pow(1024,i),!1):!0})}else l=-1;t.$validate()}),t.$validators.filesize=function(e,i){if(!e)return!1;var n=!0;return e.every(function(e,i){return e.lfFile.size>l?(n=!1,!1):!0}),n}}}}}),c.directive("lfTotalsize",function(){return{restrict:"A",require:"ngModel",link:function(e,n,t,l){if(l){var o=-1;t.$observe("lfTotalsize",function(e){var i=/^[1-9][0-9]*(Byte|KB|MB)$/;if(i.test(e)){var n=["Byte","KB","MB"],t=e.match(i)[1],r=e.substring(0,e.indexOf(t));n.every(function(e,i){return t===e?(o=parseInt(r)*Math.pow(1024,i),!1):!0})}else o=-1;l.$validate()}),l.$validators.totalsize=function(e,n){if(!e)return!1;var t=0;return i.forEach(e,function(e,i){t+=e.lfFile.size}),o>t}}}}}),c.directive("lfMimetype",function(){return{restrict:"A",require:"ngModel",link:function(e,i,n,t){if(t){var l;n.$observe("lfMimetype",function(e){var i=e.replace(/,/g,"|");l=new RegExp(i,"i"),t.$validate()}),t.$validators.mimetype=function(e,i){if(!e)return!1;var n=!0;return e.every(function(e,i){return e.lfFile.type.match(l)?!0:(n=!1,!1)}),n}}}}}),c.directive("lfNgMdFileInput",["$q","$compile","$timeout",function(e,t,l){return{restrict:"E",templateUrl:"lfNgMdFileinput.html",replace:!0,require:"ngModel",scope:{lfFiles:"=?",lfApi:"=?",lfOption:"=?",lfCaption:"@?",lfPlaceholder:"@?",lfDragAndDropLabel:"@?",lfBrowseLabel:"@?",lfRemoveLabel:"@?",lfSubmitLabel:"@?",lfOnFileClick:"=?",lfOnSubmitClick:"=?",lfOnFileRemove:"=?",accept:"@?",ngDisabled:"=?",ngChange:"&?"},link:function(t,o,r,s){var c=i.element(o[0].querySelector(".lf-ng-md-file-input-tag")),u=i.element(o[0].querySelector(".lf-ng-md-file-input-drag")),d=i.element(o[0].querySelector(".lf-ng-md-file-input-thumbnails")),m=0;t.intLoading=0,t.floatProgress=0,t.isPreview=!1,t.isDrag=!1,t.isMutiple=!1,t.isProgress=!1,t.isCustomCaption=!1,t.isSubmit=!1,i.isDefined(r.preview)&&(t.isPreview=!0),i.isDefined(r.drag)&&(t.isDrag=!0),i.isDefined(r.multiple)?(c.attr("multiple","multiple"),t.isMutiple=!0):c.removeAttr("multiple"),i.isDefined(r.progress)&&(t.isProgress=!0),i.isDefined(r.submit)&&(t.isSubmit=!0),t.isDisabled=!1,i.isDefined(r.ngDisabled)&&t.$watch("ngDisabled",function(e){t.isDisabled=e}),t.strBrowseIconCls="lf-browse",t.strRemoveIconCls="lf-remove",t.strCaptionIconCls="lf-caption",t.strSubmitIconCls="lf-submit",t.strUnknowIconCls="lf-unknow",t.strBrowseButtonCls="md-primary",t.strRemoveButtonCls="",t.strSubmitButtonCls="md-accent",i.isDefined(r.lfOption)&&i.isObject(t.lfOption)&&(t.lfOption.hasOwnProperty("browseIconCls")&&(t.strBrowseIconCls=t.lfOption.browseIconCls),t.lfOption.hasOwnProperty("removeIconCls")&&(t.strRemoveIconCls=t.lfOption.removeIconCls),t.lfOption.hasOwnProperty("captionIconCls")&&(t.strCaptionIconCls=t.lfOption.captionIconCls),t.lfOption.hasOwnProperty("unknowIconCls")&&(t.strUnknowIconCls=t.lfOption.unknowIconCls),t.lfOption.hasOwnProperty("submitIconCls")&&(t.strSubmitIconCls=t.lfOption.submitIconCls),t.lfOption.hasOwnProperty("strBrowseButtonCls")&&(t.strBrowseButtonCls=t.lfOption.strBrowseButtonCls),t.lfOption.hasOwnProperty("strRemoveButtonCls")&&(t.strRemoveButtonCls=t.lfOption.strRemoveButtonCls),t.lfOption.hasOwnProperty("strSubmitButtonCls")&&(t.strSubmitButtonCls=t.lfOption.strSubmitButtonCls)),t.accept=t.accept||"",t.lfFiles=[],t[r.ngModel]=t.lfFiles,t.lfApi=new function(){var e=this;e.removeAll=function(){t.removeAllFiles()},e.removeByName=function(e){t.removeFileByName(e)},e.addRemoteFile=function(e,i,n){var l=f(e,i,n);t.lfFiles.push(l)}},t.strCaption="",t.strCaptionPlaceholder="Select file",t.strCaptionDragAndDrop="Drag & drop files here...",t.strCaptionBrowse="Browse",t.strCaptionRemove="Remove",t.strCaptionSubmit="Submit",t.strAriaLabel="",i.isDefined(r.ariaLabel)&&(t.strAriaLabel=r.ariaLabel),i.isDefined(r.lfPlaceholder)&&t.$watch("lfPlaceholder",function(e){t.strCaptionPlaceholder=e}),i.isDefined(r.lfCaption)&&(t.isCustomCaption=!0,t.$watch("lfCaption",function(e){t.strCaption=e})),t.lfDragAndDropLabel&&(t.strCaptionDragAndDrop=t.lfDragAndDropLabel),t.lfBrowseLabel&&(t.strCaptionBrowse=t.lfBrowseLabel),t.lfRemoveLabel&&(t.strCaptionRemove=t.lfRemoveLabel),t.lfSubmitLabel&&(t.strCaptionSubmit=t.lfSubmitLabel),t.openDialog=function(e,i){e&&l(function(){e.preventDefault(),e.stopPropagation();var i=e.target.children[2];i!==n&&c[0].click()},0)},t.removeAllFilesWithoutVaildate=function(){t.isDisabled||(t.lfFiles.length=0,d.empty())},t.removeAllFiles=function(e){t.removeAllFilesWithoutVaildate(),g()},t.removeFileByName=function(e,i){t.isDisabled||(t.lfFiles.every(function(i,n){return i.lfFileName==e?(t.lfFiles.splice(n,1),!1):!0}),g())},t.removeFile=function(e){t.lfFiles.every(function(n,l){return n.key==e.key?(i.isFunction(t.lfOnFileRemove)&&t.lfOnFileRemove(n,l),t.lfFiles.splice(l,1),!1):!0}),g()},t.onFileClick=function(e){i.isFunction(t.lfOnFileClick)&&t.lfFiles.every(function(i,n){return i.key==e.key?(t.lfOnFileClick(i,n),!1):!0})},t.onSubmitClick=function(){i.isFunction(t.lfOnSubmitClick)&&t.lfOnSubmitClick(t.lfFiles)},u.bind("dragover",function(e){e.stopPropagation(),e.preventDefault(),!t.isDisabled&&t.isDrag&&u.addClass("lf-ng-md-file-input-drag-hover")}),u.bind("dragleave",function(e){e.stopPropagation(),e.preventDefault(),!t.isDisabled&&t.isDrag&&u.removeClass("lf-ng-md-file-input-drag-hover")}),u.bind("drop",function(e){if(e.stopPropagation(),e.preventDefault(),!t.isDisabled&&t.isDrag){u.removeClass("lf-ng-md-file-input-drag-hover"),i.isObject(e.originalEvent)&&(e=e.originalEvent);var n=e.target.files||e.dataTransfer.files,l=t.accept.replace(/,/g,"|"),o=new RegExp(l,"i"),r=[];i.forEach(n,function(e,i){e.type.match(o)&&r.push(e)}),p(r)}}),c.bind("change",function(e){var i=e.files||e.target.files;p(i)});var p=function(e){if(!(e.length<=0)){t.lfFiles.map(function(e){return e.lfFileName});if(t.floatProgress=0,t.isMutiple){m=e.length,t.intLoading=m;for(var i=0;i<e.length;i++){var n=e[i];setTimeout(v(n),100*i)}}else{m=1,t.intLoading=m;for(var i=0;i<e.length;i++){var n=e[i];t.removeAllFilesWithoutVaildate(),v(n);break}}c.val("")}},g=function(){i.isFunction(t.ngChange)&&t.ngChange(),s.$validate()},v=function(e){b(e).then(function(i){var n=!1;if(t.lfFiles.every(function(i,t){var l=i.lfFile;return l.name==e.name?(l.size==e.size&&l.lastModified==e.lastModified&&(n=!0),!1):!0}),!n){var l=a(e);t.lfFiles.push(l)}0==t.intLoading&&g()},function(e){},function(e){})},b=function(i,n){var l=e.defer(),o=new FileReader;return o.onloadstart=function(){l.notify(0)},o.onload=function(e){},o.onloadend=function(e){l.resolve({index:n,result:o.result}),t.intLoading--,t.floatProgress=(m-t.intLoading)/m*100},o.onerror=function(e){l.reject(o.result),t.intLoading--,t.floatProgress=(m-t.intLoading)/m*100},o.onprogress=function(e){l.notify(e.loaded/e.total)},o.readAsArrayBuffer(i),l.promise}}}}])}(window,window.angular);
\ No newline at end of file
+!function(e,i,n){"use strict";var t=function(){return"lfobjyxxxxxxxx".replace(/[xy]/g,function(e){var i=16*Math.random()|0,n="x"==e?i:3&i|8;return n.toString(16)})},l=function(e){var i=e.type,n=e.name;return o(i,n)?"image":r(i,n)?"video":s(i,n)?"audio":"object"},o=function(e,i){return!(!e.match("image.*")&&!i.match(/\.(gif|png|jpe?g)$/i))},r=function(e,i){return!(!e.match("video.*")&&!i.match(/\.(og?|mp4|webm|3gp)$/i))},s=function(e,i){return!(!e.match("audio.*")&&!i.match(/\.(ogg|mp3|wav)$/i))},a=function(i){var n={key:t(),lfFile:i,lfFileName:i.name,lfFileType:i.type,lfTagType:l(i),lfDataUrl:e.URL.createObjectURL(i),isRemote:!1};return n},f=function(e,i,n){var o={name:i,type:n},r={key:t(),lfFile:void 0,lfFileName:i,lfFileType:n,lfTagType:l(o),lfDataUrl:e,isRemote:!0};return r},c=i.module("lfNgMdFileInput",["ngMaterial"]);c.directive("lfFile",function(){return{restrict:"E",scope:{lfFileObj:"=",lfUnknowClass:"="},link:function(e,i,n){var t=e.lfFileObj.lfDataUrl,l=e.lfFileObj.lfFileType,o=e.lfFileObj.lfTagType,r=e.lfUnknowClass;switch(o){case"image":i.replaceWith('<img src="'+t+'" />');break;case"video":i.replaceWith('<video controls><source src="'+t+'""></video>');break;case"audio":i.replaceWith('<audio controls><source src="'+t+'""></audio>');break;default:void 0==e.lfFileObj.lfFile&&(l="unknown/unknown"),i.replaceWith('<object type="'+l+'" data="'+t+'"><div class="lf-ng-md-file-input-preview-default"><md-icon class="lf-ng-md-file-input-preview-icon '+r+'"></md-icon></div></object>')}}}}),c.run(["$templateCache",function(e){e.put("lfNgMdFileinput.html",['<div layout="column" class="lf-ng-md-file-input" ng-model="'+t()+'">','<div layout="column" class="lf-ng-md-file-input-preview-container" ng-class="{\'disabled\':isDisabled}" ng-show="isDrag || (isPreview && lfFiles.length)">','<md-button aria-label="remove all files" class="close lf-ng-md-file-input-x" ng-click="removeAllFiles($event)" ng-hide="!lfFiles.length || !isPreview" >&times;</md-button>','<div class="lf-ng-md-file-input-drag">','<div layout="row" layout-align="center center" class="lf-ng-md-file-input-drag-text-container" ng-show="(!lfFiles.length || !isPreview) && isDrag">','<div class="lf-ng-md-file-input-drag-text">{{strCaptionDragAndDrop}}</div>',"</div>",'<div class="lf-ng-md-file-input-thumbnails" ng-if="isPreview == true">','<div class="lf-ng-md-file-input-frame" ng-repeat="lffile in lfFiles" ng-click="onFileClick(lffile)">','<div class="lf-ng-md-file-input-x" aria-label="remove {{lffile.lFfileName}}" ng-click="removeFile(lffile,$event)">&times;</div>','<lf-file lf-file-obj="lffile" lf-unknow-class="strUnknowIconCls"/>','<div class="lf-ng-md-file-input-frame-footer">','<div class="lf-ng-md-file-input-frame-caption">{{lffile.lfFileName}}</div>',"</div>","</div>","</div>",'<div class="clearfix" style="clear:both"></div>',"</div>","</div>",'<div layout="row" class="lf-ng-md-file-input-container" >','<div class="lf-ng-md-file-input-caption" layout="row" layout-align="start center" flex ng-class="{\'disabled\':isDisabled}" >','<md-icon class="lf-icon" ng-class="strCaptionIconCls"></md-icon>','<div flex class="lf-ng-md-file-input-caption-text-default" ng-show="!lfFiles.length">',"{{strCaptionPlaceholder}}","</div>",'<div flex class="lf-ng-md-file-input-caption-text" ng-hide="!lfFiles.length">','<span ng-if="isCustomCaption">{{strCaption}}</span>','<span ng-if="!isCustomCaption">','{{ lfFiles.length == 1 ? lfFiles[0].lfFileName : lfFiles.length+" files selected" }}',"</span>","</div>",'<md-progress-linear md-mode="determinate" value="{{floatProgress}}" ng-show="intLoading && isProgress"></md-progress-linear>',"</div>",'<md-button aria-label="remove all files" ng-disabled="isDisabled" ng-click="removeAllFiles()" ng-hide="!lfFiles.length || intLoading" class="md-raised lf-ng-md-file-input-button lf-ng-md-file-input-button-remove" ng-class="strRemoveButtonCls">','<md-icon class="lf-icon" ng-class="strRemoveIconCls"></md-icon> ',"{{strCaptionRemove}}","</md-button>",'<md-button aria-label="submit" ng-disabled="isDisabled" ng-click="onSubmitClick()" class="md-raised md-warn lf-ng-md-file-input-button lf-ng-md-file-input-button-submit" ng-class="strSubmitButtonCls" ng-show="lfFiles.length && !intLoading && isSubmit">','<md-icon class="lf-icon" ng-class="strSubmitIconCls"></md-icon> ',"{{strCaptionSubmit}}","</md-button>",'<md-button aria-label="browse" ng-disabled="isDisabled" ng-click="openDialog($event, this)" class="md-raised lf-ng-md-file-input-button lf-ng-md-file-input-button-brower" ng-class="strBrowseButtonCls">','<md-icon class="lf-icon" ng-class="strBrowseIconCls"></md-icon> ',"{{strCaptionBrowse}}",'<input type="file" aria-label="{{strAriaLabel}}" accept="{{accept}}" ng-disabled="isDisabled" class="lf-ng-md-file-input-tag" />',"</md-button>","</div>","</div>"].join(""))}]),c.filter("lfTrusted",["$sce",function(e){return function(i){return e.trustAsResourceUrl(i)}}]),c.directive("lfRequired",function(){return{restrict:"A",require:"ngModel",link:function(e,i,n,t){t&&(t.$validators.required=function(e,i){return e?e.length>0:!1})}}}),c.directive("lfMaxcount",function(){return{restrict:"A",require:"ngModel",link:function(e,i,n,t){if(t){var l=-1;n.$observe("lfMaxcount",function(e){var i=parseInt(e,10);l=isNaN(i)?-1:i,t.$validate()}),t.$validators.maxcount=function(e,i){return e?e.length<=l:!1}}}}}),c.directive("lfFilesize",function(){return{restrict:"A",require:"ngModel",link:function(e,i,n,t){if(t){var l=-1;n.$observe("lfFilesize",function(e){var i=/^[1-9][0-9]*(Byte|KB|MB)$/;if(i.test(e)){var n=["Byte","KB","MB"],o=e.match(i)[1],r=e.substring(0,e.indexOf(o));n.every(function(e,i){return o===e?(l=parseInt(r)*Math.pow(1024,i),!1):!0})}else l=-1;t.$validate()}),t.$validators.filesize=function(e,i){if(!e)return!1;var n=!0;return e.every(function(e,i){return e.lfFile.size>l?(n=!1,!1):!0}),n}}}}}),c.directive("lfTotalsize",function(){return{restrict:"A",require:"ngModel",link:function(e,n,t,l){if(l){var o=-1;t.$observe("lfTotalsize",function(e){var i=/^[1-9][0-9]*(Byte|KB|MB)$/;if(i.test(e)){var n=["Byte","KB","MB"],t=e.match(i)[1],r=e.substring(0,e.indexOf(t));n.every(function(e,i){return t===e?(o=parseInt(r)*Math.pow(1024,i),!1):!0})}else o=-1;l.$validate()}),l.$validators.totalsize=function(e,n){if(!e)return!1;var t=0;return i.forEach(e,function(e,i){t+=e.lfFile.size}),o>t}}}}}),c.directive("lfMimetype",function(){return{restrict:"A",require:"ngModel",link:function(e,i,t,l){if(l){var o;t.$observe("lfMimetype",function(e){var i=e.replace(/,/g,"|");o=new RegExp(i,"i"),l.$validate()}),l.$validators.mimetype=function(e,i){if(!e)return!1;var t=!0;return e.every(function(e,i){return e.lfFile!==n&&e.lfFile.type.match(o)?!0:(t=!1,!1)}),t}}}}}),c.directive("lfNgMdFileInput",["$q","$compile","$timeout",function(e,t,l){return{restrict:"E",templateUrl:"lfNgMdFileinput.html",replace:!0,require:"ngModel",scope:{lfFiles:"=?",lfApi:"=?",lfOption:"=?",lfCaption:"@?",lfPlaceholder:"@?",lfDragAndDropLabel:"@?",lfBrowseLabel:"@?",lfRemoveLabel:"@?",lfSubmitLabel:"@?",lfOnFileClick:"=?",lfOnSubmitClick:"=?",lfOnFileRemove:"=?",accept:"@?",ngDisabled:"=?",ngChange:"&?"},link:function(t,o,r,s){var c=i.element(o[0].querySelector(".lf-ng-md-file-input-tag")),u=i.element(o[0].querySelector(".lf-ng-md-file-input-drag")),d=i.element(o[0].querySelector(".lf-ng-md-file-input-thumbnails")),m=0;t.intLoading=0,t.floatProgress=0,t.isPreview=!1,t.isDrag=!1,t.isMutiple=!1,t.isProgress=!1,t.isCustomCaption=!1,t.isSubmit=!1,i.isDefined(r.preview)&&(t.isPreview=!0),i.isDefined(r.drag)&&(t.isDrag=!0),i.isDefined(r.multiple)?(c.attr("multiple","multiple"),t.isMutiple=!0):c.removeAttr("multiple"),i.isDefined(r.progress)&&(t.isProgress=!0),i.isDefined(r.submit)&&(t.isSubmit=!0),t.isDisabled=!1,i.isDefined(r.ngDisabled)&&t.$watch("ngDisabled",function(e){t.isDisabled=e}),t.strBrowseIconCls="lf-browse",t.strRemoveIconCls="lf-remove",t.strCaptionIconCls="lf-caption",t.strSubmitIconCls="lf-submit",t.strUnknowIconCls="lf-unknow",t.strBrowseButtonCls="md-primary",t.strRemoveButtonCls="",t.strSubmitButtonCls="md-accent",i.isDefined(r.lfOption)&&i.isObject(t.lfOption)&&(t.lfOption.hasOwnProperty("browseIconCls")&&(t.strBrowseIconCls=t.lfOption.browseIconCls),t.lfOption.hasOwnProperty("removeIconCls")&&(t.strRemoveIconCls=t.lfOption.removeIconCls),t.lfOption.hasOwnProperty("captionIconCls")&&(t.strCaptionIconCls=t.lfOption.captionIconCls),t.lfOption.hasOwnProperty("unknowIconCls")&&(t.strUnknowIconCls=t.lfOption.unknowIconCls),t.lfOption.hasOwnProperty("submitIconCls")&&(t.strSubmitIconCls=t.lfOption.submitIconCls),t.lfOption.hasOwnProperty("strBrowseButtonCls")&&(t.strBrowseButtonCls=t.lfOption.strBrowseButtonCls),t.lfOption.hasOwnProperty("strRemoveButtonCls")&&(t.strRemoveButtonCls=t.lfOption.strRemoveButtonCls),t.lfOption.hasOwnProperty("strSubmitButtonCls")&&(t.strSubmitButtonCls=t.lfOption.strSubmitButtonCls)),t.accept=t.accept||"",t.lfFiles=[],t[r.ngModel]=t.lfFiles,t.lfApi=new function(){var e=this;e.removeAll=function(){t.removeAllFiles()},e.removeByName=function(e){t.removeFileByName(e)},e.addRemoteFile=function(e,i,n){var l=f(e,i,n);t.lfFiles.push(l)}},t.strCaption="",t.strCaptionPlaceholder="Select file",t.strCaptionDragAndDrop="Drag & drop files here...",t.strCaptionBrowse="Browse",t.strCaptionRemove="Remove",t.strCaptionSubmit="Submit",t.strAriaLabel="",i.isDefined(r.ariaLabel)&&(t.strAriaLabel=r.ariaLabel),i.isDefined(r.lfPlaceholder)&&t.$watch("lfPlaceholder",function(e){t.strCaptionPlaceholder=e}),i.isDefined(r.lfCaption)&&(t.isCustomCaption=!0,t.$watch("lfCaption",function(e){t.strCaption=e})),t.lfDragAndDropLabel&&(t.strCaptionDragAndDrop=t.lfDragAndDropLabel),t.lfBrowseLabel&&(t.strCaptionBrowse=t.lfBrowseLabel),t.lfRemoveLabel&&(t.strCaptionRemove=t.lfRemoveLabel),t.lfSubmitLabel&&(t.strCaptionSubmit=t.lfSubmitLabel),t.openDialog=function(e,i){e&&l(function(){e.preventDefault(),e.stopPropagation();var i=e.target.children[2];i!==n&&c[0].click()},0)},t.removeAllFilesWithoutVaildate=function(){t.isDisabled||(t.lfFiles.length=0,d.empty())},t.removeAllFiles=function(e){t.removeAllFilesWithoutVaildate(),g()},t.removeFileByName=function(e,i){t.isDisabled||(t.lfFiles.every(function(i,n){return i.lfFileName==e?(t.lfFiles.splice(n,1),!1):!0}),g())},t.removeFile=function(e){t.lfFiles.every(function(n,l){return n.key==e.key?(i.isFunction(t.lfOnFileRemove)&&t.lfOnFileRemove(n,l),t.lfFiles.splice(l,1),!1):!0}),g()},t.onFileClick=function(e){i.isFunction(t.lfOnFileClick)&&t.lfFiles.every(function(i,n){return i.key==e.key?(t.lfOnFileClick(i,n),!1):!0})},t.onSubmitClick=function(){i.isFunction(t.lfOnSubmitClick)&&t.lfOnSubmitClick(t.lfFiles)},u.bind("dragover",function(e){e.stopPropagation(),e.preventDefault(),!t.isDisabled&&t.isDrag&&u.addClass("lf-ng-md-file-input-drag-hover")}),u.bind("dragleave",function(e){e.stopPropagation(),e.preventDefault(),!t.isDisabled&&t.isDrag&&u.removeClass("lf-ng-md-file-input-drag-hover")}),u.bind("drop",function(e){if(e.stopPropagation(),e.preventDefault(),!t.isDisabled&&t.isDrag){u.removeClass("lf-ng-md-file-input-drag-hover"),i.isObject(e.originalEvent)&&(e=e.originalEvent);var n=e.target.files||e.dataTransfer.files,l=t.accept.replace(/,/g,"|"),o=new RegExp(l,"i"),r=[];i.forEach(n,function(e,i){e.type.match(o)&&r.push(e)}),p(r)}}),c.bind("change",function(e){var i=e.files||e.target.files;p(i)});var p=function(e){if(!(e.length<=0)){t.lfFiles.map(function(e){return e.lfFileName});if(t.floatProgress=0,t.isMutiple){m=e.length,t.intLoading=m;for(var i=0;i<e.length;i++){var n=e[i];setTimeout(v(n),100*i)}}else{m=1,t.intLoading=m;for(var i=0;i<e.length;i++){var n=e[i];t.removeAllFilesWithoutVaildate(),v(n);break}}c.val("")}},g=function(){i.isFunction(t.ngChange)&&t.ngChange(),s.$validate()},v=function(e){b(e).then(function(i){var l=!1;if(t.lfFiles.every(function(i,t){var o=i.lfFile;return i.isRemote?!0:o.name!==n&&o.name==e.name?(o.size==e.size&&o.lastModified==e.lastModified&&(l=!0),!1):!0}),!l){var o=a(e);t.lfFiles.push(o)}0==t.intLoading&&g()},function(e){},function(e){})},b=function(i,n){var l=e.defer(),o=new FileReader;return o.onloadstart=function(){l.notify(0)},o.onload=function(e){},o.onloadend=function(e){l.resolve({index:n,result:o.result}),t.intLoading--,t.floatProgress=(m-t.intLoading)/m*100},o.onerror=function(e){l.reject(o.result),t.intLoading--,t.floatProgress=(m-t.intLoading)/m*100},o.onprogress=function(e){l.notify(e.loaded/e.total)},o.readAsArrayBuffer(i),l.promise}}}}])}(window,window.angular);
\ No newline at end of file
diff --git a/package.json b/package.json
index 096d03e..8d6d225 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lf-ng-md-file-input",
-  "version": "1.5.2",
+  "version": "1.5.3",
   "description": "angular material file input with more feature.",
   "main": "./dist/lf-ng-md-file-input.js",
   "scripts": {