很喜欢在插件上进行修修改改。Swiper3是我很喜欢使用的一个轮播图插件。在这个插件上面，不知道是我改动的原因，还是下载的版本原因，我现在使用的这个版本的js竟然有大部分属性兼容ie9（感到很奇迹！！）。一，这个版本在ie9上面兼容什么呢？ 兼容自定义高度；传统swiper和此版本swiper对比图：（如图1）
图1
如果使用改动版本的js，可改善这个问题。 左右按钮有效，位置不变； 分页器有效，且可点击跳转到对应banner上； Loop循环属性有效； 禁止切换有效； 支持一行多列（slidesPerView参数）； Swiper的回调函数有效； breakpoints断点参数可用； 未知。改动版本在IE9上不兼容什么？ 不兼容自动切换； 不支持多列1行或者多列多行； 未知。二，Swiper（可复制以下代码，保存为js放于项目中）；
/**
* Swiper 3.4.2
* Most modern mobile touch slider and framework with hardware accelerated transitions
*
* http://www.idangero.us/swiper/
*
* Copyright 2017, Vladimir Kharlampidi
* The iDangero.us
* http://www.idangero.us/
*
* Licensed under MIT
*
* Released on: March 10, 2017
*/
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e=0;ex.size&&(s=!0));for(a=x.activeIndex-1;a>=0;a--)x.slides[a]&&!s&&(r+=x.slides[a].swiperSlideSize,t++,r>x.size&&(s=!0))}else for(e=x.activeIndex+1;e=0&&i0&&n<=x.size||i<=0&&n>=x.size)&&x.slides.eq(t).addClass(x.params.slideVisibleClass)}s.progress=x.rtl?-r:r}}},x.updateProgress=function(e){void 0===e&&(e=x.translate||0);var a=x.maxTranslate()-x.minTranslate(),t=x.isBeginning,s=x.isEnd;0===a?(x.progress=0,x.isBeginning=x.isEnd=!0):(x.progress=(e-x.minTranslate())/a,x.isBeginning=x.progress<=0,x.isEnd=x.progress>=1),x.isBeginning&&!t&&x.emit("onReachBeginning",x),x.isEnd&&!s&&x.emit("onReachEnd",x),x.params.watchSlidesProgress&&x.updateSlidesProgress(e),x.emit("onProgress",x,x.progress)},x.updateActiveIndex=function(){var e,a,t,s=x.rtl?x.translate:-x.translate;for(a=0;a=x.slidesGrid[a]&&s=x.slidesGrid[a]&&s=x.slidesGrid[a]&&(e=a);x.params.normalizeSlideIndex&&(e<0||void 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a=x.slides.eq(x.activeIndex);a.addClass(x.params.slideActiveClass),s.loop&&(a.hasClass(x.params.slideDuplicateClass)?x.wrapper.children("."+x.params.slideClass+":not(."+x.params.slideDuplicateClass+')[data-swiper-slide-index="'+x.realIndex+'"]').addClass(x.params.slideDuplicateActiveClass):x.wrapper.children("."+x.params.slideClass+"."+x.params.slideDuplicateClass+'[data-swiper-slide-index="'+x.realIndex+'"]').addClass(x.params.slideDuplicateActiveClass));var t=a.next("."+x.params.slideClass).addClass(x.params.slideNextClass);x.params.loop&&0===t.length&&(t=x.slides.eq(0),t.addClass(x.params.slideNextClass));var r=a.prev("."+x.params.slideClass).addClass(x.params.slidePrevClass);if(x.params.loop&&0===r.length&&(r=x.slides.eq(-1),r.addClass(x.params.slidePrevClass)),s.loop&&(t.hasClass(x.params.slideDuplicateClass)?x.wrapper.children("."+x.params.slideClass+":not(."+x.params.slideDuplicateClass+')[data-swiper-slide-index="'+t.attr("data-swiper-slide-index")+'"]').addClass(x.params.slideDuplicateNextClass):x.wrapper.children("."+x.params.slideClass+"."+x.params.slideDuplicateClass+'[data-swiper-slide-index="'+t.attr("data-swiper-slide-index")+'"]').addClass(x.params.slideDuplicateNextClass),r.hasClass(x.params.slideDuplicateClass)?x.wrapper.children("."+x.params.slideClass+":not(."+x.params.slideDuplicateClass+')[data-swiper-slide-index="'+r.attr("data-swiper-slide-index")+'"]').addClass(x.params.slideDuplicatePrevClass):x.wrapper.children("."+x.params.slideClass+"."+x.params.slideDuplicateClass+'[data-swiper-slide-index="'+r.attr("data-swiper-slide-index")+'"]').addClass(x.params.slideDuplicatePrevClass)),x.paginationContainer&&x.paginationContainer.length>0){var i,n=x.params.loop?Math.ceil((x.slides.length-2*x.loopedSlides)/x.params.slidesPerGroup):x.snapGrid.length;if(x.params.loop?(i=Math.ceil((x.activeIndex-x.loopedSlides)/x.params.slidesPerGroup),i>x.slides.length-1-2*x.loopedSlides&&(i-=x.slides.length-2*x.loopedSlides),i>n-1&&(i-=n),i<0&&"bullets"!==x.params.paginationType&&(i=n+i)):i=void 0!==x.snapIndex?x.snapIndex:x.activeIndex||0,"bullets"===x.params.paginationType&&x.bullets&&x.bullets.length>0&&(x.bullets.removeClass(x.params.bulletActiveClass),x.paginationContainer.length>1?x.bullets.each(function(){e(this).index()===i&&e(this).addClass(x.params.bulletActiveClass)}):x.bullets.eq(i).addClass(x.params.bulletActiveClass)),"fraction"===x.params.paginationType&&(x.paginationContainer.find("."+x.params.paginationCurrentClass).text(i+1),x.paginationContainer.find("."+x.params.paginationTotalClass).text(n)),"progress"===x.params.paginationType){var o=(i+1)/n,l=o,p=1;x.isHorizontal()||(p=o,l=1),x.paginationContainer.find("."+x.params.paginationProgressbarClass).transform("translate3d(0,0,0) scaleX("+l+") 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a(){x.rtl,x.translate;t=Math.min(Math.max(x.translate,x.maxTranslate()),x.minTranslate()),x.setWrapperTranslate(t),x.updateActiveIndex(),x.updateClasses()}if(x){x.updateContainerSize(),x.updateSlidesSize(),x.updateProgress(),x.updatePagination(),x.updateClasses(),x.params.scrollbar&&x.scrollbar&&x.scrollbar.set();var t;if(e){x.controller&&x.controller.spline&&(x.controller.spline=void 0),x.params.freeMode?(a(),x.params.autoHeight&&x.updateAutoHeight()):(("auto"===x.params.slidesPerView||x.params.slidesPerView>1)&&x.isEnd&&!x.params.centeredSlides?x.slideTo(x.slides.length-1,0,!1,!0):x.slideTo(x.activeIndex,0,!1,!0))||a()}else x.params.autoHeight&&x.updateAutoHeight()}},x.onResize=function(e){x.params.onBeforeResize&&x.params.onBeforeResize(x),x.params.breakpoints&&x.setBreakpoint();var a=x.params.allowSwipeToPrev,t=x.params.allowSwipeToNext;x.params.allowSwipeToPrev=x.params.allowSwipeToNext=!0,x.updateContainerSize(),x.updateSlidesSize(),("auto"===x.params.slidesPerView||x.params.freeMode||e)&&x.updatePagination(),x.params.scrollbar&&x.scrollbar&&x.scrollbar.set(),x.controller&&x.controller.spline&&(x.controller.spline=void 0);var s=!1;if(x.params.freeMode){var r=Math.min(Math.max(x.translate,x.maxTranslate()),x.minTranslate());x.setWrapperTranslate(r),x.updateActiveIndex(),x.updateClasses(),x.params.autoHeight&&x.updateAutoHeight()}else x.updateClasses(),s=("auto"===x.params.slidesPerView||x.params.slidesPerView>1)&&x.isEnd&&!x.params.centeredSlides?x.slideTo(x.slides.length-1,0,!1,!0):x.slideTo(x.activeIndex,0,!1,!0);x.params.lazyLoading&&!s&&x.lazy&&x.lazy.load(),x.params.allowSwipeToPrev=a,x.params.allowSwipeToNext=t,x.params.onAfterResize&&x.params.onAfterResize(x)},x.touchEventsDesktop={start:"mousedown",move:"mousemove",end:"mouseup"},window.navigator.pointerEnabled?x.touchEventsDesktop={start:"pointerdown",move:"pointermove",end:"pointerup"}:window.navigator.msPointerEnabled&&(x.touchEventsDesktop={start:"MSPointerDown",move:"MSPointerMove",end:"MSPointerUp"}),x.touchEvents={start:x.support.touch||!x.params.simulateTouch?"touchstart":x.touchEventsDesktop.start,move:x.support.touch||!x.params.simulateTouch?"touchmove":x.touchEventsDesktop.move,end:x.support.touch||!x.params.simulateTouch?"touchend":x.touchEventsDesktop.end},(window.navigator.pointerEnabled||window.navigator.msPointerEnabled)&&("container"===x.params.touchEventsTarget?x.container:x.wrapper).addClass("swiper-wp8-"+x.params.direction),x.initEvents=function(e){var a=e?"off":"on",t=e?"removeEventListener":"addEventListener",r="container"===x.params.touchEventsTarget?x.container[0]:x.wrapper[0],i=x.support.touch?r:document,n=!!x.params.nested;if(x.browser.ie)r[t](x.touchEvents.start,x.onTouchStart,!1),i[t](x.touchEvents.move,x.onTouchMove,n),i[t](x.touchEvents.end,x.onTouchEnd,!1);else{if(x.support.touch){var o=!("touchstart"!==x.touchEvents.start||!x.support.passiveListener||!x.params.passiveListeners)&&{passive:!0,capture:!1};r[t](x.touchEvents.start,x.onTouchStart,o),r[t](x.touchEvents.move,x.onTouchMove,n),r[t](x.touchEvents.end,x.onTouchEnd,o)}(s.simulateTouch&&!x.device.ios&&!x.device.android||s.simulateTouch&&!x.support.touch&&x.device.ios)&&(r[t]("mousedown",x.onTouchStart,!1),document[t]("mousemove",x.onTouchMove,n),document[t]("mouseup",x.onTouchEnd,!1))}window[t]("resize",x.onResize),x.params.nextButton&&x.nextButton&&x.nextButton.length>0&&(x.nextButton[a]("click",x.onClickNext),x.params.a11y&&x.a11y&&x.nextButton[a]("keydown",x.a11y.onEnterKey)),x.params.prevButton&&x.prevButton&&x.prevButton.length>0&&(x.prevButton[a]("click",x.onClickPrev),x.params.a11y&&x.a11y&&x.prevButton[a]("keydown",x.a11y.onEnterKey)),x.params.pagination&&x.params.paginationClickable&&(x.paginationContainer[a]("click","."+x.params.bulletClass,x.onClickIndex),x.params.a11y&&x.a11y&&x.paginationContainer[a]("keydown","."+x.params.bulletClass,x.a11y.onEnterKey)),(x.params.preventClicks||x.params.preventClicksPropagation)&&r[t]("click",x.preventClicks,!0)},x.attachEvents=function(){x.initEvents()},x.detachEvents=function(){x.initEvents(!0)},x.allowClick=!0,x.preventClicks=function(e){x.allowClick||(x.params.preventClicks&&e.preventDefault(),x.params.preventClicksPropagation&&x.animating&&(e.stopPropagation(),e.stopImmediatePropagation()))},x.onClickNext=function(e){e.preventDefault(),x.isEnd&&!x.params.loop||x.slideNext()},x.onClickPrev=function(e){e.preventDefault(),x.isBeginning&&!x.params.loop||x.slidePrev()},x.onClickIndex=function(a){a.preventDefault();var t=e(this).index()*x.params.slidesPerGroup
网站题目：前端开发之可以让swiper3兼容ie9的js
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