Viewer.js实现图片放大缩小旋转

1、引入css和js

<script th:src="@{/workflow/js/viewer.min.js}" >script>
<link rel="stylesheet" th:href="@{/workflow/css/viewer.min.css}">

js

/*!
 * Viewer.js v1.11.3
 * https://fengyuanchen.github.io/viewerjs
 *
 * Copyright 2015-present Chen Fengyuan
 * Released under the MIT license
 *
 * Date: 2023-03-05T07:01:17.741Z
 */
!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).Viewer=e()}(this,function(){"use strict";function s(e,t){var i,n=Object.keys(e);return Object.getOwnPropertySymbols&&(i=Object.getOwnPropertySymbols(e),t&&(i=i.filter(function(t){return Object.getOwnPropertyDescriptor(e,t).enumerable})),n.push.apply(n,i)),n}function q(n){for(var t=1;t=this.length||this.viewed&&t===this.index)){if(!this.isShown)return this.index=t,this.show();this.viewing&&this.viewing.abort();var e,n,o,s=this.element,a=this.options,r=this.title,l=this.canvas,h=this.items[t],c=h.querySelector("img"),u=N(c,"originalUrl"),d=c.getAttribute("alt"),m=document.createElement("img");A(a.inheritedAttributes,function(t){var e=c.getAttribute(t);null!==e&&m.setAttribute(t,e)}),m.src=u,m.alt=d,I(a.view)&&X(s,"view",a.view,{once:!0}),!1===P(s,"view",{originalImage:this.images[t],index:t,image:m})||!this.isShown||this.hiding||this.played||((u=this.items[this.index])&&(M(u,f),u.removeAttribute("aria-selected")),R(h,f),h.setAttribute("aria-selected",!0),a.focus&&h.focus(),this.image=m,this.viewed=!1,this.index=t,this.imageData={},R(m,p),a.loading&&R(l,b),l.innerHTML="",l.appendChild(m),this.renderList(),r.innerHTML="",X(s,z,e=function(){var t=i.imageData,e=Array.isArray(a.title)?a.title[1]:a.title;r.innerHTML=T(e=I(e)?e.call(i,m,t):"".concat(d," (").concat(t.naturalWidth," × ").concat(t.naturalHeight,")"))?e.replace(/&(?!amp;|quot;|#39;|lt;|gt;)/g,"&").replace(/"/g,""").replace(/'/g,"'").replace(/g,"<").replace(/>/g,">"):e},{once:!0}),this.viewing={abort:function(){Y(s,z,e),m.complete?i.imageRendering?i.imageRendering.abort():i.imageInitializing&&i.imageInitializing.abort():(m.src="",Y(m,y,n),i.timeout&&clearTimeout(i.timeout))}},m.complete?this.load():(X(m,y,n=function(){Y(m,x,o),i.load()},{once:!0}),X(m,x,o=function(){Y(m,y,n),i.timeout&&(clearTimeout(i.timeout),i.timeout=!1),M(m,p),a.loading&&M(i.canvas,b)},{once:!0}),this.timeout&&clearTimeout(this.timeout),this.timeout=setTimeout(function(){M(m,p),i.timeout=!1},1e3)))}return this},prev:function(){var t=this.index-1;return t<0&&(t=0<Math.abs(e)}),a[0]),!1,null,t);break;case j:this.action="switched";var l=Math.abs(o);1>Math.abs(r)&&(this.pointers={},1<div class="viewer-container" tabindex="-1" touch-action="none"><div class="viewer-canvas">div><div class="viewer-footer"><div class="viewer-title">div><div class="viewer-toolbar">div><div class="viewer-navbar"><ul class="viewer-list" role="navigation">ul>div>div><div class="viewer-tooltip" role="alert" aria-hidden="true">div><div class="viewer-button" data-viewer-action="mix" role="button">div><div class="viewer-player">div>div>',d=(i=d.querySelector(".".concat(g,"-container"))).querySelector(".".concat(g,"-title")),n=i.querySelector(".".concat(g,"-toolbar")),m=i.querySelector(".".concat(g,"-navbar")),o=i.querySelector(".".concat(g,"-button")),a=i.querySelector(".".concat(g,"-canvas")),this.parent=e,this.viewer=i,this.title=d,this.toolbar=n,this.navbar=m,this.button=o,this.canvas=a,this.footer=i.querySelector(".".concat(g,"-footer")),this.tooltipBox=i.querySelector(".".concat(g,"-tooltip")),this.player=i.querySelector(".".concat(g,"-player")),this.list=i.querySelector(".".concat(g,"-list")),i.id="".concat(g).concat(this.id),d.id="".concat(g,"Title").concat(this.id),R(d,s.title?Tt(Array.isArray(s.title)?s.title[0]:s.title):v),R(m,s.navbar?Tt(s.navbar):v),F(o,v,!s.button),s.keyboard&&o.setAttribute("tabindex",0),s.backdrop&&(R(i,"".concat(g,"-backdrop")),s.inline||"static"===s.backdrop||pt(a,ht,"hide")),T(s.className)&&s.className&&s.className.split(ct).forEach(function(t){R(i,t)}),s.toolbar?(r=document.createElement("ul"),l=S(s.toolbar),h=ut.slice(0,3),c=ut.slice(7,9),u=ut.slice(9),l||R(n,Tt(s.toolbar)),A(l?s.toolbar:ut,function(t,e){var i,n=l&&S(t),e=l?vt(e):t,o=n&&!D(t.show)?t.show:t;!o||!s.zoomable&&-1!==h.indexOf(e)||!s.rotatable&&-1!==c.indexOf(e)||!s.scalable&&-1!==u.indexOf(e)||(i=n&&!D(t.size)?t.size:t,n=n&&!D(t.click)?t.click:t,t=document.createElement("li"),s.keyboard&&t.setAttribute("tabindex",0),t.setAttribute("role","button"),R(t,"".concat(g,"-").concat(e)),I(n)||pt(t,ht,e),E(o)&&R(t,Tt(o)),-1!==["small","large"].indexOf(i)?R(t,"".concat(g,"-").concat(i)):"play"===e&&R(t,"".concat(g,"-large")),I(n)&&X(t,w,n),r.appendChild(t))}),n.appendChild(r)):R(n,v),s.rotatable||(R(d=n.querySelectorAll('li[class*="rotate"]'),p),A(d,function(t){n.appendChild(t)})),s.inline?(R(o,U),C(i,{zIndex:s.zIndexInline}),"static"===window.getComputedStyle(e).position&&C(e,{position:"relative"}),e.insertBefore(i,t.nextSibling)):(R(o,H),R(i,V),R(i,B),R(i,v),C(i,{zIndex:s.zIndex}),(m=(m=T(m=s.container)?t.ownerDocument.querySelector(m):m)||this.body).appendChild(i)),s.inline&&(this.render(),this.bind(),this.isShown=!0),this.ready=!0,I(s.ready)&&X(t,"ready",s.ready,{once:!0}),!1===P(t,"ready")?this.ready=!1:this.ready&&s.inline&&this.view(this.index))}}])&&r(t.prototype,e),i&&r(t,i),Object.defineProperty(t,"prototype",{writable:!1}),o}();return O(e.prototype,i,t,St,It,At),e});

css

/*!
 * Viewer.js v1.11.3
 * https://fengyuanchen.github.io/viewerjs
 *
 * Copyright 2015-present Chen Fengyuan
 * Released under the MIT license
 *
 * Date: 2023-03-05T07:01:15.525Z
 */.viewer-close:before,.viewer-flip-horizontal:before,.viewer-flip-vertical:before,.viewer-fullscreen-exit:before,.viewer-fullscreen:before,.viewer-next:before,.viewer-one-to-one:before,.viewer-play:before,.viewer-prev:before,.viewer-reset:before,.viewer-rotate-left:before,.viewer-rotate-right:before,.viewer-zoom-in:before,.viewer-zoom-out:before{background-image:url("data:image/png;base64,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");background-repeat:no-repeat;background-size:280px;color:transparent;display:block;font-size:0;height:20px;line-height:0;width:20px}.viewer-zoom-in:before{background-position:0 0;content:"Zoom In"}.viewer-zoom-out:before{background-position:-20px 0;content:"Zoom Out"}.viewer-one-to-one:before{background-position:-40px 0;content:"One to One"}.viewer-reset:before{background-position:-60px 0;content:"Reset"}.viewer-prev:before{background-position:-80px 0;content:"Previous"}.viewer-play:before{background-position:-100px 0;content:"Play"}.viewer-next:before{background-position:-120px 0;content:"Next"}.viewer-rotate-left:before{background-position:-140px 0;content:"Rotate Left"}.viewer-rotate-right:before{background-position:-160px 0;content:"Rotate Right"}.viewer-flip-horizontal:before{background-position:-180px 0;content:"Flip Horizontal"}.viewer-flip-vertical:before{background-position:-200px 0;content:"Flip Vertical"}.viewer-fullscreen:before{background-position:-220px 0;content:"Enter Full Screen"}.viewer-fullscreen-exit:before{background-position:-240px 0;content:"Exit Full Screen"}.viewer-close:before{background-position:-260px 0;content:"Close"}.viewer-container{-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;bottom:0;direction:ltr;font-size:0;left:0;line-height:0;overflow:hidden;position:absolute;right:0;top:0;-ms-touch-action:none;touch-action:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.viewer-container ::-moz-selection,.viewer-container::-moz-selection{background-color:transparent}.viewer-container ::selection,.viewer-container::selection{background-color:transparent}.viewer-container:focus{outline:0}.viewer-container img{display:block;height:auto;max-height:none!important;max-width:none!important;min-height:0!important;min-width:0!important;width:100%}.viewer-canvas{bottom:0;left:0;overflow:hidden;position:absolute;right:0;top:0}.viewer-canvas>img{height:auto;margin:15px auto;max-width:90%!important;width:auto}.viewer-footer{bottom:0;left:0;overflow:hidden;position:absolute;right:0;text-align:center}.viewer-navbar{background-color:rgba(0,0,0,.5);overflow:hidden}.viewer-list{box-sizing:content-box;height:50px;margin:0;overflow:hidden;padding:1px 0}.viewer-list>li{color:transparent;cursor:pointer;float:left;font-size:0;height:50px;line-height:0;opacity:.5;overflow:hidden;transition:opacity .15s;width:30px}.viewer-list>li:focus,.viewer-list>li:hover{opacity:.75}.viewer-list>li:focus{outline:0}.viewer-list>li+li{margin-left:1px}.viewer-list>.viewer-loading{position:relative}.viewer-list>.viewer-loading:after{border-width:2px;height:20px;margin-left:-10px;margin-top:-10px;width:20px}.viewer-list>.viewer-active,.viewer-list>.viewer-active:focus,.viewer-list>.viewer-active:hover{opacity:1}.viewer-player{background-color:#000;bottom:0;cursor:none;display:none;right:0;z-index:1}.viewer-player,.viewer-player>img{left:0;position:absolute;top:0}.viewer-toolbar>ul{display:inline-block;margin:0 auto 5px;overflow:hidden;padding:6px 3px}.viewer-toolbar>ul>li{background-color:rgba(0,0,0,.5);border-radius:50%;cursor:pointer;float:left;height:24px;overflow:hidden;transition:background-color .15s;width:24px}.viewer-toolbar>ul>li:focus,.viewer-toolbar>ul>li:hover{background-color:rgba(0,0,0,.8)}.viewer-toolbar>ul>li:focus{box-shadow:0 0 3px #fff;outline:0;position:relative;z-index:1}.viewer-toolbar>ul>li:before{margin:2px}.viewer-toolbar>ul>li+li{margin-left:1px}.viewer-toolbar>ul>.viewer-small{height:18px;margin-bottom:3px;margin-top:3px;width:18px}.viewer-toolbar>ul>.viewer-small:before{margin:-1px}.viewer-toolbar>ul>.viewer-large{height:30px;margin-bottom:-3px;margin-top:-3px;width:30px}.viewer-toolbar>ul>.viewer-large:before{margin:5px}.viewer-tooltip{background-color:rgba(0,0,0,.8);border-radius:10px;color:#fff;display:none;font-size:12px;height:20px;left:50%;line-height:20px;margin-left:-25px;margin-top:-10px;position:absolute;text-align:center;top:50%;width:50px}.viewer-title{color:#ccc;display:inline-block;font-size:12px;line-height:1.2;margin:5px 5%;max-width:90%;min-height:14px;opacity:.8;overflow:hidden;text-overflow:ellipsis;transition:opacity .15s;white-space:nowrap}.viewer-title:hover{opacity:1}.viewer-button{-webkit-app-region:no-drag;background-color:rgba(0,0,0,.5);border-radius:50%;cursor:pointer;height:80px;overflow:hidden;position:absolute;right:-40px;top:-40px;transition:background-color .15s;width:80px}.viewer-button:focus,.viewer-button:hover{background-color:rgba(0,0,0,.8)}.viewer-button:focus{box-shadow:0 0 3px #fff;outline:0}.viewer-button:before{bottom:15px;left:15px;position:absolute}.viewer-fixed{position:fixed}.viewer-open{overflow:hidden}.viewer-show{display:block}.viewer-hide{display:none}.viewer-backdrop{background-color:rgba(0,0,0,.5)}.viewer-invisible{visibility:hidden}.viewer-move{cursor:move;cursor:grab}.viewer-fade{opacity:0}.viewer-in{opacity:1}.viewer-transition{transition:all .3s}@keyframes viewer-spinner{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.viewer-loading:after{animation:viewer-spinner 1s linear infinite;border:4px solid hsla(0,0%,100%,.1);border-left-color:hsla(0,0%,100%,.5);border-radius:50%;content:"";display:inline-block;height:40px;left:50%;margin-left:-20px;margin-top:-20px;position:absolute;top:50%;width:40px;z-index:1}@media (max-width:767px){.viewer-hide-xs-down{display:none}}@media (max-width:991px){.viewer-hide-sm-down{display:none}}@media (max-width:1199px){.viewer-hide-md-down{display:none}}

2、Html结构

<img id="myImage" src="img/viewer1.jpg" class="mid-img" />

3、js初始化

var viewer = new Viewer(document.getElementById('myImage'));