1、 Viewer.js简介

Viewer.js 是一款强大的图片查看器。我们通过Viewer.js 在页面上添加强大的图片查看功能，同时，这款优秀的插件配置操作起来也非常的方便。

Viewer.js分为2个版本，js版本和jquery版本，下载地址分别为

纯JS版本：https://github.com/fengyuanchen/viewerjs

jQuery 版本：GitHub - fengyuanchen/jquery-viewer: A jQuery plugin wrapper for Viewer.js.、

网上看到有说jquery版本有bug，最后选用啦js版本，demo截图大概如下：

2、Viewer.js支持的功能

支持移动设备触摸事件
支持响应式
支持放大/缩小
支持旋转(类似微博的图片旋转)
支持水平/垂直翻转
支持图片移动
支持键盘
支持全屏幻灯片模式(可做屏保)
支持缩略图
支持标题显示
支持多种自定义事件

3、Viewer.js的API

名称	类型	默认值	说明
inline	布尔值	false	启用 inline 模式
button	布尔值	true	显示右上角关闭按钮(jQuery 版本无效)
navbar	布尔值/整型	true	显示缩略图导航
title	布尔值/整型	true	显示当前图片的标题(现实 alt 属性及图片尺寸)
toolbar	布尔值/整型	true	显示工具栏
tooltip	布尔值	true	显示缩放百分比
movable	布尔值	true	图片是否可移动
zoomable	布尔值	true	图片是否可缩放
rotatable	布尔值	true	图片是否可旋转
scalable	布尔值	true	图片是否可翻转
transition	布尔值	true	使用 CSS3 过度
fullscreen	布尔值	true	播放时是否全屏
keyboard	布尔值	true	是否支持键盘
interval	整型	5000	播放间隔，单位为毫秒
zoomRatio	浮点型	0.1	鼠标滚动时的缩放比例
minZoomRatio	浮点型	0.01	最小缩放比例
maxZoomRatio	数字	100	最大缩放比例
zIndex	数字	2015	设置图片查看器 modal 模式时的 z-index
zIndexInline	数字	0	设置图片查看器 inline 模式时的 z-index
url	字符串/函数	src	设置大图片的 url
build	函数	null	回调函数，具体查看演示
built	函数	null	回调函数，具体查看演示
show	函数	null	回调函数，具体查看演示
shown	函数	null	回调函数，具体查看演示
hide	函数	null	回调函数，具体查看演示
hidden	函数	null	回调函数，具体查看演示
view	函数	null	回调函数，具体查看演示
viewed	函数	null	回调函数，具体查看演示

4 使用方法

4.1 引入方式

js，jquery版本,直接文件引入
Javascript版：

<link rel="stylesheet" href="css/viewer.min.css">
<script src="js/viewer.min.js"></script>

jQuery版：

 <link rel="stylesheet" href="css/viewer.min.css"><script src="js/jquery.min.js"></script> <script src="js/viewer.min.js"></script>

npm，直接install

npm install viewerjs

4.2 简单demo

这里为我用的是js版本，简单做了一个demo
html代码

<!doctype html>
<html lang="en" ng-app="pharosApp">
<head><meta charset="utf-8"><meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" /><meta http-equiv="Pragma" content="no-cache" /><meta http-equiv="Expires" content="0" /><title>图片预览</title><link rel="stylesheet" href="viewer.min.css" /><script src="jquery.min.js"></script><script type="text/javascript" src="viewer.min.js"></script><style>#viewer {padding: 2%;}#viewer img {margin: 1%;width: 22.5%;height: 200px;object-fit:fill;}</style><script>function previewImg() {var viewer = new Viewer(document.getElementById('viewer'), {button: true,inline: false,zoomable: true,title: true,tooltip: true,minZoomRatio: 0.5,maxZoomRatio: 100,movable: true,interval: 2000,navbar: true,loading: true,show: function () {viewer.update();}});$("body").on("click", ".viewer-container", function (e) {viewer.hide()});$("body").on("click", ".viewer-canvas", function (e) {e.stopPropagation();});$("body").on("click", ".viewer-footer", function (e) {e.stopPropagation();});$("body").on("click", ".viewer-button", function (e) {e.stopPropagation();});$("body").on("click", ".viewer-tooltip", function (e) {e.stopPropagation();});$("body").on("click", ".viewer-player", function (e) {e.stopPropagation();});}</script>
</head>
<body><div id="viewer"><img src="1.png" /><img src="2.png" /><img src="3.png" /></div>
</body>
</html>

5.viewer.js源码，js版本

viewer.min.css

/*!* Viewer.js v0.3.1* https://github.com/fengyuanchen/viewerjs** Copyright (c) 2015-2016 Fengyuan Chen* Released under the MIT license** Date: 2016-02-02T11:35:36.273Z*/.viewer-container,.viewer-navbar{background-color:#000;overflow:hidden}.viewer-canvas,.viewer-container,.viewer-footer,.viewer-player{right:0;bottom:0;left:0}.viewer-button,.viewer-canvas,.viewer-container,.viewer-footer,.viewer-list,.viewer-navbar,.viewer-open,.viewer-title,.viewer-toolbar,.viewer-toolbar>li{overflow:hidden}.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{font-size:0;line-height:0;display:block;width:20px;height:20px;color:transparent;background-image:url(data:image/png;base64,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);background-repeat:no-repeat}.viewer-zoom-in:before{content:'Zoom 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viewer.min.js

/*!* Viewer.js v0.3.1* https://github.com/fengyuanchen/viewerjs** Copyright (c) 2015-2016 Fengyuan Chen* Released under the MIT license** Date: 2016-02-02T11:35:52.542Z*/
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e=this,t=W.documentElement;!e.isFulled||W.fullscreenElement||W.mozFullScreenElement||W.webkitFullscreenElement||W.msFullscreenElement||(t.requestFullscreen?t.requestFullscreen():t.msRequestFullscreen?t.msRequestFullscreen():t.mozRequestFullScreen?t.mozRequestFullScreen():t.webkitRequestFullscreen&&t.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT))},exitFullscreen:function(){var e=this;e.isFulled&&(W.exitFullscreen?W.exitFullscreen():W.msExitFullscreen?W.msExitFullscreen():W.mozCancelFullScreen?W.mozCancelFullScreen():W.webkitExitFullscreen&&W.webkitExitFullscreen())},change:function(e){var t=this,i=t.endX-t.startX,n=t.endY-t.startY;switch(t.action){case"move":t.move(i,n);break;case"zoom":t.zoom(function(e,t,i,n){var a=Ve(e*e+t*t),o=Ve(i*i+n*n);return(o-a)/a}(Se(t.startX-t.startX2),Se(t.startY-t.startY2),Se(t.endX-t.endX2),Se(t.endY-t.endY2)),!1,e),t.startX2=t.endX2,t.startY2=t.endY2;break;case"switch":t.action="switched",Se(i)>Se(n)&&(i>1?t.prev():-1>i&&t.next())}t.startX=t.endX,t.startY=t.endY},isSwitchable:function(){var e=this,t=e.imageData,i=e.viewerData;return t.left>=0&&t.top>=0&&t.width<=i.width&&t.height<=i.height}},O.DEFAULTS={inline:!1,button:!0,navbar:!0,title:!0,toolbar:!0,tooltip:!0,movable:!0,zoomable:!0,rotatable:!0,scalable:!0,transition:!0,fullscreen:!0,keyboard:!0,interval:5e3,minWidth:200,minHeight:100,zoomRatio:.1,minZoomRatio:.01,maxZoomRatio:100,zIndex:2015,zIndexInline:0,url:"src",build:null,built:null,show:null,shown:null,hide:null,hidden:null,view:null,viewed:null},O.TEMPLATE='<div class="viewer-container"><div class="viewer-canvas"></div><div class="viewer-footer"><div class="viewer-title"></div><ul class="viewer-toolbar"><li class="viewer-zoom-in" data-action="zoom-in"></li><li class="viewer-zoom-out" data-action="zoom-out"></li><li class="viewer-one-to-one" data-action="one-to-one"></li><li class="viewer-reset" data-action="reset"></li><li class="viewer-prev" data-action="prev"></li><li class="viewer-play" data-action="play"></li><li class="viewer-next" data-action="next"></li><li class="viewer-rotate-left" data-action="rotate-left"></li><li class="viewer-rotate-right" data-action="rotate-right"></li><li class="viewer-flip-horizontal" data-action="flip-horizontal"></li><li class="viewer-flip-vertical" data-action="flip-vertical"></li></ul><div class="viewer-navbar"><ul class="viewer-list"></ul></div></div><div class="viewer-tooltip"></div><div class="viewer-button" data-action="mix"></div><div class="viewer-player"></div></div>';var Re=e.Viewer;return O.noConflict=function(){return e.Viewer=Re,O},O.setDefaults=function(e){h(O.DEFAULTS,e)},"function"==typeof define&&define.amd&&define("viewer",[],function(){return O}),t||(e.Viewer=O),O});```

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强大的图片预览组件Viewer.js