diff --git a/dist/nz-tour.js b/dist/nz-tour.js
index 45be04b..821c3fb 100755
--- a/dist/nz-tour.js
+++ b/dist/nz-tour.js
@@ -919,7 +919,7 @@
                             height: '100%',
                             width: '0px'
                         });
-                        return;
+                        return $q.when(null);
                     }
 
                     els.masks_top.css({
diff --git a/dist/nz-tour.min.js b/dist/nz-tour.min.js
index 3bd0266..95e7247 100644
--- a/dist/nz-tour.min.js
+++ b/dist/nz-tour.min.js
@@ -1 +1 @@
-!function(){function t(e){return angular.forEach(arguments,function(o){o!==e&&angular.forEach(o,function(o,r){e[r]&&e[r].constructor&&e[r].constructor===Object?t(e[r],o):e[r]=o})}),e}function e(t,e,o,n){t[_removeEventListener](a+e,"wheel"==s?o:r,n||!1)}function o(t,e,o,n){t[i](a+e,"wheel"==s?o:r,n||!1)}function r(t){!t&&(t=window.event);var e={originalEvent:t,target:t.target||t.srcElement,type:"wheel",deltaMode:"MozMousePixelScroll"==t.type?0:1,deltaX:0,deltaZ:0,preventDefault:function(){t.preventDefault?t.preventDefault():t.returnValue=!1}};return"mousewheel"==s?(e.deltaY=-1/40*t.wheelDelta,t.wheelDeltaX&&(e.deltaX=-1/40*t.wheelDeltaX)):e.deltaY=t.detail,callback(e)}var n=angular.module("nzTour",[]);if(n.factory("nzTour",["$q","$rootScope","$compile","$timeout",function(e,o,r,n){function i(t){return t||e.reject("No Tour Specified!"),t.steps.length||e.reject("No steps were found in that tour!"),T.current?s().then(function(){return u(t)}):u(t)}function s(){return m().then(function(){return g(!1)}).then(function(){return T.current.promise.reject(),T.current=!1,!0})}function a(){T.current&&x()}function l(){return T.current||T.current.reject(),m().then(w).then(function(){T.current.step++}).then(h)}function f(){return m().then(function(){return T.current.step>0?(T.current.step--,!0):e.reject()}).then(h)}function c(t){return t>0&&t<=T.current.tour.steps.length?m().then(function(){T.current.step=t-1}).then(h):e.reject("Requested step not defined")}function u(o){o.config=t({},T.config,o.config);var r=function(t){if(!angular.isArray(t))return!1;for(var e=0;e<t.length;e+=1)if(-1===T.config.placementPriority.indexOf(t[e]))return!1;return!0};return r(o.config.placementPriority)||(o.config.placementPriority=T.config.placementPriority),angular.forEach(o.steps,function(t){t.placementPriority&&(r(t.placementPriority)||delete t.placementPriority)}),T.current={tour:o,step:0,promise:e.defer()},g(!0,o),h(),T.current.promise.promise}function g(t,o){return t?(T.box=angular.element(r('<nz-tour class="hidden"></nz-tour>')(T)),angular.element(T.body).append(T.box),T.box.removeClass("hidden"),e.when(null)):(T.box.addClass("hidden"),n(function(){T.cleanup()},T.current.tour.config.animationDuration))}function h(){return d().then(p)}function d(){return T.current.tour.steps[T.current.step].before?T.current.tour.steps[T.current.step].before():e.when(null)}function p(){return T.$broadcast("step",T.current.step),e.when(null)}function m(){return T.current.tour.steps[T.current.step].after?T.current.tour.steps[T.current.step].after():e.when(null)}function w(){return T.current.step===T.current.tour.steps.length-1?v().then(function(){return e.reject("No more steps left")}):e.when(null)}function v(){return g(!1).then(function(){return T.current.promise.resolve(),T.current=!1,!0})}function x(){}function b(t,e){var o=!1;return function(){o||(t.call(),o=!0,n(function(){o=!1},e))}}function k(t,e,o){var r;return function(){var n=this,i=arguments,s=function(){r=null,o||t.apply(n,i)},a=o&&!r;clearTimeout(r),r=setTimeout(s,e),a&&t.apply(n,i)}}var T=o.$new();return angular.extend(T,{config:{mask:{visible:!0,clickThrough:!1,clickExit:!1,scrollThrough:!0,color:"rgba(0,0,0,.7)"},dark:!1,scrollBox:-1!=navigator.userAgent.indexOf("AppleWebKit")?"body":"html",previousText:"Previous",nextText:"Next",finishText:"Finish",animationDuration:400,placementPriority:["bottom","right","top","left"],disableHotkeys:!1},current:!1,body:angular.element("body"),box:!1,start:i,stop:s,pause:a,next:l,previous:f,gotoStep:c,throttle:b,debounce:k}),window.nzTour=T,T}]),n.directive("nzTour",["$q",function(t){return{template:['<div id="nzTour-box-wrap">','   <div id="nzTour-box">','        <div id="nzTour-tip" class="top center"></div>','        <div id="nzTour-step">{{view.step + 1}}</div>','        <div id="nzTour-length">{{view.length}}</div>','        <div id="nzTour-close" ng-click="stop()">&#10005</div>','        <div id="nzTour-content">','           <div id="nzTour-inner-content"></div>',"        </div>",'        <div id="nzTour-actions">','            <button id="nzTour-previous" ng-show="view.step > 0" ng-click="previous()">{{view.previousText}}</button>','            <button id="nzTour-next" ng-show="view.step >= 0" ng-click="next()" class="success">{{view.nextText}}</button>',"        </div>","    </div>","</div>",'<div class="nzTour-masks" ng-show="current.tour.config.mask.visible" ng-click="tryStop()">','    <div class="mask top" ng-style="{\'background-color\': current.tour.config.mask.color}"></div>','    <div class="mask right" ng-style="{\'background-color\': current.tour.config.mask.color}"></div>','    <div class="mask bottom" ng-style="{\'background-color\': current.tour.config.mask.color}"></div>','    <div class="mask left" ng-style="{\'background-color\': current.tour.config.mask.color}"></div>',"</div>"].join(" "),link:function(e,o){function r(t){if(t.which>=49&&t.which<=57)return void e.gotoStep(t.which-48);switch(t.which){case 37:return e.previous(),void l(t);case 39:return e.next(),void l(t);case 27:return e.stop(),void l(t);case 38:case 40:return void P()}}function n(t){return t.stopPropagation(t),t.preventDefault(t),t.returnValue=!1,!1}function i(t){var e=D.masks_top.add(D.masks_right).add(D.masks_bottom).add(D.masks_left);t?(_=!0,e.css("transition","all "+x.animationDuration+"ms ease")):(_=!1,e.css("transition","all 0"))}function s(t){var e=D.wrap.add(D.box).add(D.tip);t?e.css("transition","all "+x.animationDuration+"ms ease"):e.css("transition","all 0")}function a(t){var e;e="DOMMouseScroll"==t.type?-40*t.detail:t.wheelDelta;var o=e>0,r=D.content.scrollTop();return o&&!r?l(t):o||D.innerContent.height()-D.content.height()!=r?void 0:l(t)}function l(t){return t.stopPropagation(t),t.preventDefault(t),t.returnValue=!1,!1}function f(){k||(y=!0,i(!1),R(),g(E).then(h).then(d).then(h).then(m))}function c(){y=!1,i(!0)}function u(t,o){D.target=!1;var r=e.current.tour.steps;return E=o,e.view={step:o,length:r.length,previousText:x.previousText,nextText:o==r.length-1?x.finishText:x.nextText},D.innerContent.html(r[o].content),D.content.scrollTop(0),k=!0,g(o).then(h).then(d).then(h).then(m).then(function(){k=!1})}function g(o){var r=t.defer();if(D.target)r.resolve(b);else{var n=angular.element(e.current.tour.steps[o].target);n.length?(D.target=angular.element(n[0]),r.resolve(D.target)):r.resolve(!1)}return r.promise}function h(){return D.target?(M.window={width:D.window.width(),height:D.window.height()},M.scroll={width:D.scroll.outerWidth(),height:D.scroll.outerHeight(),offset:D.scroll.offset(),scroll:{top:D.scroll.scrollTop(),left:D.scroll.scrollLeft()}},angular.forEach(M.scroll.offset,function(t,e){M.scroll.offset[e]=Math.ceil(t)}),M.scroll.height=M.scroll.height+M.scroll.offset.top>M.window.height?M.window.height:M.scroll.height,M.scroll.width=M.scroll.width+M.scroll.offset.left>M.window.width?M.window.width:M.scroll.width,M.scroll.offset.toBottom=M.scroll.height+M.scroll.offset.top,M.scroll.offset.toRight=M.scroll.width+M.scroll.offset.left,M.scroll.offset.fromBottom=M.window.height-M.scroll.offset.top-M.scroll.height,M.scroll.offset.fromRight=M.window.width-M.scroll.offset.left-M.scroll.width,M.target={width:D.target.outerWidth(),height:D.target.outerHeight(),offset:D.target.offset()},("body"==x.scrollBox||"html"==x.scrollBox)&&(M.target.offset.top-=M.scroll.scroll.top),angular.forEach(M.target.offset,function(t,e){M.target.offset[e]=Math.ceil(t)}),M.target.offset.toBottom=M.target.offset.top+M.target.height,M.target.offset.toRight=M.target.offset.left+M.target.width,M.target.offset.fromBottom=M.window.height-M.target.offset.top-M.target.height,M.target.offset.fromRight=M.window.width-M.target.offset.left-M.target.width,M.target.margins={offset:{top:M.target.offset.top-T,left:M.target.offset.left-T,toBottom:M.target.offset.toBottom+T,toRight:M.target.offset.toRight+T,fromBottom:M.target.offset.fromBottom-T,fromRight:M.target.offset.fromRight-T},height:M.target.height+2*T,right:M.target.offset.fromRight+2*T},t.when(null)):t.when(null)}function d(){if(!D.target)return t.when(null);var e=p(),o=t.defer();return e?D.scroll.animate({scrollTop:e},y?0:x.animationDuration,function(){o.resolve()}):o.resolve(),o.promise}function p(){return M.target.margins.height>M.scroll.height?M.target.offset.toBottom-z<M.scroll.offset.top?M.scroll.scroll.top-(M.scroll.offset.top-(M.target.offset.toBottom-z)):M.target.offset.top+z>M.scroll.offset.toBottom?M.scroll.scroll.top+(M.target.offset.top+z-M.scroll.offset.toBottom):!1:M.target.margins.offset.top<M.scroll.offset.top?M.scroll.scroll.top-(M.scroll.offset.top-M.target.margins.offset.top):M.target.margins.offset.toBottom>M.scroll.offset.toBottom?M.scroll.scroll.top+(M.target.margins.offset.toBottom-M.scroll.offset.toBottom):!1}function m(){return t.all([w(),v()])}function w(){function o(){return M.target.margins.offset.fromBottom>z?M.target.width>B?(s("bottom","center"),!0):M.target.offset.fromRight+M.target.width>B?(s("bottom","left"),!0):(s("bottom","right"),!0):!1}function r(){return M.target.margins.offset.fromRight>B?M.target.margins.height>M.scroll.height?M.target.offset.top>M.window.height/2?(a("right","top"),!0):M.target.offset.fromBottom>M.window.height/2?(a("right","bottom"),!0):(a("right","center",!0),!0):M.target.height>z?(a("right","center"),!0):M.target.offset.fromBottom+M.target.height>z?(a("right","top"),!0):(a("right","bottom"),!0):!1}function n(){return M.target.margins.offset.left>B?M.target.margins.height>M.scroll.height?(a("left","center",!0),!0):M.target.height>z?(a("left","center"),!0):M.target.offset.fromBottom+M.target.height>z?(a("left","top"),!0):(a("left","bottom"),!0):!1}function i(){return M.target.margins.offset.top>z?M.target.width>B?(s("top","center"),!0):M.target.offset.fromRight+M.target.width>B?(s("top","left"),!0):(s("top","right"),!0):!1}function s(t,e){var o,r,n,i,s;"top"==t?(o=M.target.margins.offset.top,s="bottom",i="-100%"):(o=M.target.margins.offset.toBottom,s="top",i="0"),"right"==e?(r=M.target.offset.toRight,n="-100%"):"center"==e?(r=M.target.offset.left+M.target.width/2,n="-50%"):(r=M.target.offset.left,n="0"),D.wrap.css({left:r+"px",top:o+"px",transform:"translate("+n+","+i+")"}),D.tip.attr("class","vertical "+s+" "+e)}function a(t,e,o){var r,n,i,s,a;"right"==t?(n=M.target.margins.offset.toRight,a="left",i="0"):(n=M.target.margins.offset.left,a="right",i="-100%"),o?(r=M.window.height/2,s="-50%"):"top"==e?(r=M.target.offset.top,s="0"):"center"==e?(r=M.target.offset.top+M.target.height/2,s="-50%"):(r=M.target.offset.toBottom,s="-100%"),D.wrap.css({left:n+"px",top:r+"px",transform:"translate("+i+","+s+")"}),D.tip.attr("class","horizontal "+a+" "+e)}function l(t,e){var o,r,n,i;"top"==t?(o=M.target.margins.offset.top<M.scroll.offset.top?T:M.target.offset.top,n="0"):(o=M.target.margins.offset.toBottom>M.scroll.offset.toBottom?M.scroll.offset.toBottom-T:M.target.offset.toBottom,n="-100%"),"right"==e?(r=M.target.offset.left+M.target.width,i="-100%"):"center"==e?(r=M.target.offset.left+M.target.width/2,i="-50%"):(r=M.target.offset.left,i="0"),D.wrap.css({left:r+"px",top:o+"px",transform:"translate("+i+","+n+")"}),D.tip.attr("class","hidden")}function f(){D.wrap.css({left:"50%",top:"50%",transform:"translate(-50%, -50%)",margin:"0"}),D.tip.attr("class","hidden")}var c=e.current.tour.steps[e.current.step];if(!D.target)return void f();var u={bottom:o,right:r,left:n,top:i},g=!1;return angular.forEach(c.placementPriority||x.placementPriority,function(t){!g&&u[t]()&&(g=!0)}),g||l("bottom","center"),t.when(null)}function v(){return D.target?(D.masks_top.css({height:M.target.offset.top+"px",top:M.target.offset.top<0?M.target.offset.top+"px":0}),D.masks_bottom.css({height:M.target.offset.fromBottom+"px",bottom:M.target.offset.fromBottom<0?M.target.offset.fromBottom+"px":0}),D.masks_left.css({top:M.target.offset.top+"px",height:M.target.height+"px",width:M.target.offset.left+"px"}),D.masks_right.css({top:M.target.offset.top+"px",height:M.target.height+"px",width:M.target.offset.fromRight+"px"}),t.when(null)):(D.masks_top.css({height:"0px"}),D.masks_bottom.css({height:"0px"}),D.masks_left.css({top:"0px",height:"100%",width:"0px"}),void D.masks_right.css({top:"0px",height:"100%",width:"0px"}))}var x=e.current.tour.config,b=!1,k=!1,T=15,z=120,B=250,y=!1,_=!0,E=null,D={window:angular.element(window),wrap:o.find("#nzTour-box-wrap"),box:o.find("#nzTour-box"),tip:o.find("#nzTour-tip"),step:o.find("#nzTour-step"),close:o.find("#nzTour-close"),content:o.find("#nzTour-content"),innerContent:o.find("#nzTour-inner-content"),actions:o.find("#nzTour-actions"),previous:o.find("#nzTour-previous"),next:o.find("#nzTour-next"),masks_wrap:o.find(".nzTour-masks"),masks_top:o.find(".nzTour-masks .top"),masks_right:o.find(".nzTour-masks .right"),masks_bottom:o.find(".nzTour-masks .bottom"),masks_left:o.find(".nzTour-masks .left"),scroll:angular.element(x.scrollBox),target:!1},M={window:{},scroll:{},target:{}};i(!0),s(!0),D.masks_wrap.css("pointer-events",x.mask.clickThrough?"none":"all"),x.dark&&(D.box.addClass("dark-box"),T=7);var L=e.$on("step",u),P=e.throttle(f,16),R=e.debounce(c,100);0==x.disableHotkeys&&(D.window.bind("keydown",r),D.window.bind("resize scroll",P),window.addWheelListener(window,P),D.content.bind("scroll",a),window.addWheelListener(D.content[0],a),x.mask.scrollThrough===!1&&window.addWheelListener(D.masks_wrap[0],n)),e.cleanup=function(){L(),D.window.unbind("keydown",r),D.window.unbind("resize scroll",P),window.removeWheelListener(window,P),D.content.unbind("scroll",a),window.removeWheelListener(D.content[0],a),x.mask.scrollThrough===!1&&window.removeWheelListener(D.masks_wrap[0],n),D={},o.remove()},e.tryStop=function(){x.mask.clickExit&&e.stop()}}}}]),!window.addWheelListener){var i,s,a="";window.addEventListener?(i="addEventListener",_removeEventListener="removeEventListener"):(i="attachEvent",_removeEventListener="detachEvent",a="on"),s="onwheel"in document.createElement("div")?"wheel":void 0!==document.onmousewheel?"mousewheel":"DOMMouseScroll",window.addWheelListener=function(t,e,r){o(t,s,e,r),"DOMMouseScroll"==s&&o(t,"MozMousePixelScroll",e,r)},window.removeWheelListener=function(t,o,r){e(t,s,o,r),"DOMMouseScroll"==s&&e(t,"MozMousePixelScroll",o,r)}}}();
\ No newline at end of file
+!function(){function t(e){return angular.forEach(arguments,function(o){o!==e&&angular.forEach(o,function(o,r){e[r]&&e[r].constructor&&e[r].constructor===Object?t(e[r],o):e[r]=o})}),e}function e(t,e,o,n){t[_removeEventListener](l+e,"wheel"==s?o:r,n||!1)}function o(t,e,o,n){t[i](l+e,"wheel"==s?o:r,n||!1)}function r(t){!t&&(t=window.event);var e={originalEvent:t,target:t.target||t.srcElement,type:"wheel",deltaMode:"MozMousePixelScroll"==t.type?0:1,deltaX:0,deltaZ:0,preventDefault:function(){t.preventDefault?t.preventDefault():t.returnValue=!1}};return"mousewheel"==s?(e.deltaY=-1/40*t.wheelDelta,t.wheelDeltaX&&(e.deltaX=-1/40*t.wheelDeltaX)):e.deltaY=t.detail,callback(e)}var n=angular.module("nzTour",[]);if(n.factory("nzTour",["$q","$rootScope","$compile","$timeout",function(e,o,r,n){function i(t){return t||e.reject("No Tour Specified!"),t.steps.length||e.reject("No steps were found in that tour!"),T.current?s().then(function(){return u(t)}):u(t)}function s(){return m().then(function(){return g(!1)}).then(function(){return T.current.promise.reject(),T.current=!1,!0})}function l(){T.current&&x()}function a(){return T.current||T.current.reject(),m().then(w).then(function(){T.current.step++}).then(h)}function f(){return m().then(function(){return T.current.step>0?(T.current.step--,!0):e.reject()}).then(h)}function c(t){return t>0&&t<=T.current.tour.steps.length?m().then(function(){T.current.step=t-1}).then(h):e.reject("Requested step not defined")}function u(o){o.config=t({},T.config,o.config);var r=function(t){if(!angular.isArray(t))return!1;for(var e=0;e<t.length;e+=1)if(-1===T.config.placementPriority.indexOf(t[e]))return!1;return!0};return r(o.config.placementPriority)||(o.config.placementPriority=T.config.placementPriority),angular.forEach(o.steps,function(t){t.placementPriority&&(r(t.placementPriority)||delete t.placementPriority)}),T.current={tour:o,step:0,promise:e.defer()},g(!0,o),h(),T.current.promise.promise}function g(t,o){return t?(T.box=angular.element(r('<nz-tour class="hidden"></nz-tour>')(T)),angular.element(T.body).append(T.box),T.box.removeClass("hidden"),e.when(null)):(T.box.addClass("hidden"),n(function(){T.cleanup()},T.current.tour.config.animationDuration))}function h(){return d().then(p)}function d(){return T.current.tour.steps[T.current.step].before?T.current.tour.steps[T.current.step].before():e.when(null)}function p(){return T.$broadcast("step",T.current.step),e.when(null)}function m(){return T.current.tour.steps[T.current.step].after?T.current.tour.steps[T.current.step].after():e.when(null)}function w(){return T.current.step===T.current.tour.steps.length-1?v().then(function(){return e.reject("No more steps left")}):e.when(null)}function v(){return g(!1).then(function(){return T.current.promise.resolve(),T.current=!1,!0})}function x(){}function b(t,e){var o=!1;return function(){o||(t.call(),o=!0,n(function(){o=!1},e))}}function k(t,e,o){var r;return function(){var n=this,i=arguments,s=function(){r=null,o||t.apply(n,i)},l=o&&!r;clearTimeout(r),r=setTimeout(s,e),l&&t.apply(n,i)}}var T=o.$new();return angular.extend(T,{config:{mask:{visible:!0,clickThrough:!1,clickExit:!1,scrollThrough:!0,color:"rgba(0,0,0,.7)"},dark:!1,scrollBox:-1!=navigator.userAgent.indexOf("AppleWebKit")?"body":"html",previousText:"Previous",nextText:"Next",finishText:"Finish",animationDuration:400,placementPriority:["bottom","right","top","left"],disableHotkeys:!1},current:!1,body:angular.element("body"),box:!1,start:i,stop:s,pause:l,next:a,previous:f,gotoStep:c,throttle:b,debounce:k}),window.nzTour=T,T}]),n.directive("nzTour",["$q",function(t){return{template:['<div id="nzTour-box-wrap">','   <div id="nzTour-box">','        <div id="nzTour-tip" class="top center"></div>','        <div id="nzTour-step">{{view.step + 1}}</div>','        <div id="nzTour-length">{{view.length}}</div>','        <div id="nzTour-close" ng-click="stop()">&#10005</div>','        <div id="nzTour-content">','           <div id="nzTour-inner-content"></div>',"        </div>",'        <div id="nzTour-actions">','            <button id="nzTour-previous" ng-show="view.step > 0" ng-click="previous()">{{view.previousText}}</button>','            <button id="nzTour-next" ng-show="view.step >= 0" ng-click="next()" class="success">{{view.nextText}}</button>',"        </div>","    </div>","</div>",'<div class="nzTour-masks" ng-show="current.tour.config.mask.visible" ng-click="tryStop()">','    <div class="mask top" ng-style="{\'background-color\': current.tour.config.mask.color}"></div>','    <div class="mask right" ng-style="{\'background-color\': current.tour.config.mask.color}"></div>','    <div class="mask bottom" ng-style="{\'background-color\': current.tour.config.mask.color}"></div>','    <div class="mask left" ng-style="{\'background-color\': current.tour.config.mask.color}"></div>',"</div>"].join(" "),link:function(e,o){function r(t){if(t.which>=49&&t.which<=57)return void e.gotoStep(t.which-48);switch(t.which){case 37:return e.previous(),void a(t);case 39:return e.next(),void a(t);case 27:return e.stop(),void a(t);case 38:case 40:return void P()}}function n(t){return t.stopPropagation(t),t.preventDefault(t),t.returnValue=!1,!1}function i(t){var e=D.masks_top.add(D.masks_right).add(D.masks_bottom).add(D.masks_left);t?(_=!0,e.css("transition","all "+x.animationDuration+"ms ease")):(_=!1,e.css("transition","all 0"))}function s(t){var e=D.wrap.add(D.box).add(D.tip);t?e.css("transition","all "+x.animationDuration+"ms ease"):e.css("transition","all 0")}function l(t){var e;e="DOMMouseScroll"==t.type?-40*t.detail:t.wheelDelta;var o=e>0,r=D.content.scrollTop();return o&&!r?a(t):o||D.innerContent.height()-D.content.height()!=r?void 0:a(t)}function a(t){return t.stopPropagation(t),t.preventDefault(t),t.returnValue=!1,!1}function f(){k||(y=!0,i(!1),R(),g(E).then(h).then(d).then(h).then(m))}function c(){y=!1,i(!0)}function u(t,o){D.target=!1;var r=e.current.tour.steps;return E=o,e.view={step:o,length:r.length,previousText:x.previousText,nextText:o==r.length-1?x.finishText:x.nextText},D.innerContent.html(r[o].content),D.content.scrollTop(0),k=!0,g(o).then(h).then(d).then(h).then(m).then(function(){k=!1})}function g(o){var r=t.defer();if(D.target)r.resolve(b);else{var n=angular.element(e.current.tour.steps[o].target);n.length?(D.target=angular.element(n[0]),r.resolve(D.target)):r.resolve(!1)}return r.promise}function h(){return D.target?(M.window={width:D.window.width(),height:D.window.height()},M.scroll={width:D.scroll.outerWidth(),height:D.scroll.outerHeight(),offset:D.scroll.offset(),scroll:{top:D.scroll.scrollTop(),left:D.scroll.scrollLeft()}},angular.forEach(M.scroll.offset,function(t,e){M.scroll.offset[e]=Math.ceil(t)}),M.scroll.height=M.scroll.height+M.scroll.offset.top>M.window.height?M.window.height:M.scroll.height,M.scroll.width=M.scroll.width+M.scroll.offset.left>M.window.width?M.window.width:M.scroll.width,M.scroll.offset.toBottom=M.scroll.height+M.scroll.offset.top,M.scroll.offset.toRight=M.scroll.width+M.scroll.offset.left,M.scroll.offset.fromBottom=M.window.height-M.scroll.offset.top-M.scroll.height,M.scroll.offset.fromRight=M.window.width-M.scroll.offset.left-M.scroll.width,M.target={width:D.target.outerWidth(),height:D.target.outerHeight(),offset:D.target.offset()},("body"==x.scrollBox||"html"==x.scrollBox)&&(M.target.offset.top-=M.scroll.scroll.top),angular.forEach(M.target.offset,function(t,e){M.target.offset[e]=Math.ceil(t)}),M.target.offset.toBottom=M.target.offset.top+M.target.height,M.target.offset.toRight=M.target.offset.left+M.target.width,M.target.offset.fromBottom=M.window.height-M.target.offset.top-M.target.height,M.target.offset.fromRight=M.window.width-M.target.offset.left-M.target.width,M.target.margins={offset:{top:M.target.offset.top-T,left:M.target.offset.left-T,toBottom:M.target.offset.toBottom+T,toRight:M.target.offset.toRight+T,fromBottom:M.target.offset.fromBottom-T,fromRight:M.target.offset.fromRight-T},height:M.target.height+2*T,right:M.target.offset.fromRight+2*T},t.when(null)):t.when(null)}function d(){if(!D.target)return t.when(null);var e=p(),o=t.defer();return e?D.scroll.animate({scrollTop:e},y?0:x.animationDuration,function(){o.resolve()}):o.resolve(),o.promise}function p(){return M.target.margins.height>M.scroll.height?M.target.offset.toBottom-z<M.scroll.offset.top?M.scroll.scroll.top-(M.scroll.offset.top-(M.target.offset.toBottom-z)):M.target.offset.top+z>M.scroll.offset.toBottom?M.scroll.scroll.top+(M.target.offset.top+z-M.scroll.offset.toBottom):!1:M.target.margins.offset.top<M.scroll.offset.top?M.scroll.scroll.top-(M.scroll.offset.top-M.target.margins.offset.top):M.target.margins.offset.toBottom>M.scroll.offset.toBottom?M.scroll.scroll.top+(M.target.margins.offset.toBottom-M.scroll.offset.toBottom):!1}function m(){return t.all([w(),v()])}function w(){function o(){return M.target.margins.offset.fromBottom>z?M.target.width>B?(s("bottom","center"),!0):M.target.offset.fromRight+M.target.width>B?(s("bottom","left"),!0):(s("bottom","right"),!0):!1}function r(){return M.target.margins.offset.fromRight>B?M.target.margins.height>M.scroll.height?M.target.offset.top>M.window.height/2?(l("right","top"),!0):M.target.offset.fromBottom>M.window.height/2?(l("right","bottom"),!0):(l("right","center",!0),!0):M.target.height>z?(l("right","center"),!0):M.target.offset.fromBottom+M.target.height>z?(l("right","top"),!0):(l("right","bottom"),!0):!1}function n(){return M.target.margins.offset.left>B?M.target.margins.height>M.scroll.height?(l("left","center",!0),!0):M.target.height>z?(l("left","center"),!0):M.target.offset.fromBottom+M.target.height>z?(l("left","top"),!0):(l("left","bottom"),!0):!1}function i(){return M.target.margins.offset.top>z?M.target.width>B?(s("top","center"),!0):M.target.offset.fromRight+M.target.width>B?(s("top","left"),!0):(s("top","right"),!0):!1}function s(t,e){var o,r,n,i,s;"top"==t?(o=M.target.margins.offset.top,s="bottom",i="-100%"):(o=M.target.margins.offset.toBottom,s="top",i="0"),"right"==e?(r=M.target.offset.toRight,n="-100%"):"center"==e?(r=M.target.offset.left+M.target.width/2,n="-50%"):(r=M.target.offset.left,n="0"),D.wrap.css({left:r+"px",top:o+"px",transform:"translate("+n+","+i+")"}),D.tip.attr("class","vertical "+s+" "+e)}function l(t,e,o){var r,n,i,s,l;"right"==t?(n=M.target.margins.offset.toRight,l="left",i="0"):(n=M.target.margins.offset.left,l="right",i="-100%"),o?(r=M.window.height/2,s="-50%"):"top"==e?(r=M.target.offset.top,s="0"):"center"==e?(r=M.target.offset.top+M.target.height/2,s="-50%"):(r=M.target.offset.toBottom,s="-100%"),D.wrap.css({left:n+"px",top:r+"px",transform:"translate("+i+","+s+")"}),D.tip.attr("class","horizontal "+l+" "+e)}function a(t,e){var o,r,n,i;"top"==t?(o=M.target.margins.offset.top<M.scroll.offset.top?T:M.target.offset.top,n="0"):(o=M.target.margins.offset.toBottom>M.scroll.offset.toBottom?M.scroll.offset.toBottom-T:M.target.offset.toBottom,n="-100%"),"right"==e?(r=M.target.offset.left+M.target.width,i="-100%"):"center"==e?(r=M.target.offset.left+M.target.width/2,i="-50%"):(r=M.target.offset.left,i="0"),D.wrap.css({left:r+"px",top:o+"px",transform:"translate("+i+","+n+")"}),D.tip.attr("class","hidden")}function f(){D.wrap.css({left:"50%",top:"50%",transform:"translate(-50%, -50%)",margin:"0"}),D.tip.attr("class","hidden")}var c=e.current.tour.steps[e.current.step];if(!D.target)return void f();var u={bottom:o,right:r,left:n,top:i},g=!1;return angular.forEach(c.placementPriority||x.placementPriority,function(t){!g&&u[t]()&&(g=!0)}),g||a("bottom","center"),t.when(null)}function v(){return D.target?(D.masks_top.css({height:M.target.offset.top+"px",top:M.target.offset.top<0?M.target.offset.top+"px":0}),D.masks_bottom.css({height:M.target.offset.fromBottom+"px",bottom:M.target.offset.fromBottom<0?M.target.offset.fromBottom+"px":0}),D.masks_left.css({top:M.target.offset.top+"px",height:M.target.height+"px",width:M.target.offset.left+"px"}),D.masks_right.css({top:M.target.offset.top+"px",height:M.target.height+"px",width:M.target.offset.fromRight+"px"}),t.when(null)):(D.masks_top.css({height:"0px"}),D.masks_bottom.css({height:"0px"}),D.masks_left.css({top:"0px",height:"100%",width:"0px"}),D.masks_right.css({top:"0px",height:"100%",width:"0px"}),t.when(null))}var x=e.current.tour.config,b=!1,k=!1,T=15,z=120,B=250,y=!1,_=!0,E=null,D={window:angular.element(window),wrap:o.find("#nzTour-box-wrap"),box:o.find("#nzTour-box"),tip:o.find("#nzTour-tip"),step:o.find("#nzTour-step"),close:o.find("#nzTour-close"),content:o.find("#nzTour-content"),innerContent:o.find("#nzTour-inner-content"),actions:o.find("#nzTour-actions"),previous:o.find("#nzTour-previous"),next:o.find("#nzTour-next"),masks_wrap:o.find(".nzTour-masks"),masks_top:o.find(".nzTour-masks .top"),masks_right:o.find(".nzTour-masks .right"),masks_bottom:o.find(".nzTour-masks .bottom"),masks_left:o.find(".nzTour-masks .left"),scroll:angular.element(x.scrollBox),target:!1},M={window:{},scroll:{},target:{}};i(!0),s(!0),D.masks_wrap.css("pointer-events",x.mask.clickThrough?"none":"all"),x.dark&&(D.box.addClass("dark-box"),T=7);var L=e.$on("step",u),P=e.throttle(f,16),R=e.debounce(c,100);0==x.disableHotkeys&&(D.window.bind("keydown",r),D.window.bind("resize scroll",P),window.addWheelListener(window,P),D.content.bind("scroll",l),window.addWheelListener(D.content[0],l),x.mask.scrollThrough===!1&&window.addWheelListener(D.masks_wrap[0],n)),e.cleanup=function(){L(),D.window.unbind("keydown",r),D.window.unbind("resize scroll",P),window.removeWheelListener(window,P),D.content.unbind("scroll",l),window.removeWheelListener(D.content[0],l),x.mask.scrollThrough===!1&&window.removeWheelListener(D.masks_wrap[0],n),D={},o.remove()},e.tryStop=function(){x.mask.clickExit&&e.stop()}}}}]),!window.addWheelListener){var i,s,l="";window.addEventListener?(i="addEventListener",_removeEventListener="removeEventListener"):(i="attachEvent",_removeEventListener="detachEvent",l="on"),s="onwheel"in document.createElement("div")?"wheel":void 0!==document.onmousewheel?"mousewheel":"DOMMouseScroll",window.addWheelListener=function(t,e,r){o(t,s,e,r),"DOMMouseScroll"==s&&o(t,"MozMousePixelScroll",e,r)},window.removeWheelListener=function(t,o,r){e(t,s,o,r),"DOMMouseScroll"==s&&e(t,"MozMousePixelScroll",o,r)}}}();
\ No newline at end of file
diff --git a/src/nz-tour.js b/src/nz-tour.js
index 3829458..463d032 100755
--- a/src/nz-tour.js
+++ b/src/nz-tour.js
@@ -919,7 +919,7 @@
                             height: '100%',
                             width: '0px'
                         });
-                        return;
+                        return $q.when(null);
                     }
 
                     els.masks_top.css({