Javascript 需要帮助实现EasyZoom jquery插件吗
一般来说，我对jquery和javascript不太熟悉，请耐心听我说。但是，我正在尝试使用EasyZoom:创建一个带有缩放悬停的图像库。我想实现一些类似于链接中“带缩略图图像”下的内容 到目前为止，我已经创建了包含图像的div，从GitHub复制了CSS和javascript文件，并将我的HTML页面链接到它们，请参见下面的特定代码 但是，我显然遗漏了一些东西。在JS文件中，我找到一个地方，上面写着Javascript 需要帮助实现EasyZoom jquery插件吗,javascript,html,jquery,css,jquery-plugins,Javascript,Html,Jquery,Css,Jquery Plugins,一般来说，我对jquery和javascript不太熟悉，请耐心听我说。但是，我正在尝试使用EasyZoom:创建一个带有缩放悬停的图像库。我想实现一些类似于链接中“带缩略图图像”下的内容 到目前为止，我已经创建了包含图像的div，从GitHub复制了CSS和javascript文件，并将我的HTML页面链接到它们，请参见下面的特定代码 但是，我显然遗漏了一些东西。在JS文件中，我找到一个地方，上面写着@param{Object}target我应该在HTML中指定需要Easyzoom的对象吗？如
@param{Object}target/**
* EasyZoom core styles
*/
.easyzoom {
position: relative;
/* 'Shrink-wrap' the element */
display: inline-block;
*display: inline;
*zoom: 1;
}
.easyzoom img {
vertical-align: bottom;
}
.easyzoom.is-loading img {
cursor: progress;
}
.easyzoom.is-ready img {
cursor: crosshair;
}
.easyzoom.is-error img {
cursor: not-allowed;
}
.easyzoom-notice {
position: absolute;
top: 50%;
left: 50%;
z-index: 150;
width: 10em;
margin: -1em 0 0 -5em;
line-height: 2em;
text-align: center;
background: #FFF;
box-shadow: 0 0 10px #888;
}
.easyzoom-flyout {
position:absolute;
z-index: 100;
overflow: hidden;
background: #FFF;
}
(function (root, factory) {
'use strict';
if(typeof define === 'function' && define.amd) {
define(['jquery'], function($){
factory($);
});
} else if(typeof module === 'object' && module.exports) {
module.exports = (root.EasyZoom = factory(require('jquery')));
} else {
root.EasyZoom = factory(root.jQuery);
}
}(this, function ($) {
'use strict';
var zoomImgOverlapX;
var zoomImgOverlapY;
var ratioX;
var ratioY;
var pointerPositionX;
var pointerPositionY;
var defaults = {
// The text to display within the notice box while loading the zoom image.
loadingNotice: 'Loading image',
// The text to display within the notice box if an error occurs when loading the zoom image.
errorNotice: 'The image could not be loaded',
// The time (in milliseconds) to display the error notice.
errorDuration: 2500,
// Attribute to retrieve the zoom image URL from.
linkAttribute: 'href',
// Prevent clicks on the zoom image link.
preventClicks: true,
// Callback function to execute before the flyout is displayed.
beforeShow: $.noop,
// Callback function to execute before the flyout is removed.
beforeHide: $.noop,
// Callback function to execute when the flyout is displayed.
onShow: $.noop,
// Callback function to execute when the flyout is removed.
onHide: $.noop,
// Callback function to execute when the cursor is moved while over the image.
onMove: $.noop
};
/**
* EasyZoom
* @constructor
* @param {Object} target
* @param {Object} options (Optional)
*/
function EasyZoom(target, options) {
this.$target = $(target);
this.opts = $.extend({}, defaults, options, this.$target.data());
this.isOpen === undefined && this._init();
}
/**
* Init
* @private
*/
EasyZoom.prototype._init = function() {
this.$link = this.$target.find('a');
this.$image = this.$target.find('img');
this.$flyout = $('<div class="easyzoom-flyout" />');
this.$notice = $('<div class="easyzoom-notice" />');
this.$target.on({
'mousemove.easyzoom touchmove.easyzoom': $.proxy(this._onMove, this),
'mouseleave.easyzoom touchend.easyzoom': $.proxy(this._onLeave, this),
'mouseenter.easyzoom touchstart.easyzoom': $.proxy(this._onEnter, this)
});
this.opts.preventClicks && this.$target.on('click.easyzoom', function(e) {
e.preventDefault();
});
};
/**
* Show
* @param {MouseEvent|TouchEvent} e
* @param {Boolean} testMouseOver (Optional)
*/
EasyZoom.prototype.show = function(e, testMouseOver) {
var self = this;
if (this.opts.beforeShow.call(this) === false) return;
if (!this.isReady) {
return this._loadImage(this.$link.attr(this.opts.linkAttribute), function() {
if (self.isMouseOver || !testMouseOver) {
self.show(e);
}
});
}
this.$target.append(this.$flyout);
var targetWidth = this.$target.outerWidth();
var targetHeight = this.$target.outerHeight();
var flyoutInnerWidth = this.$flyout.width();
var flyoutInnerHeight = this.$flyout.height();
var zoomImgWidth = this.$zoom.width();
var zoomImgHeight = this.$zoom.height();
zoomImgOverlapX = Math.ceil(zoomImgWidth - flyoutInnerWidth);
zoomImgOverlapY = Math.ceil(zoomImgHeight - flyoutInnerHeight);
// For when the zoom image is smaller than the flyout element.
if (zoomImgOverlapX < 0) zoomImgOverlapX = 0;
if (zoomImgOverlapY < 0) zoomImgOverlapY = 0;
ratioX = zoomImgOverlapX / targetWidth;
ratioY = zoomImgOverlapY / targetHeight;
this.isOpen = true;
this.opts.onShow.call(this);
e && this._move(e);
};
/**
* On enter
* @private
* @param {Event} e
*/
EasyZoom.prototype._onEnter = function(e) {
var touches = e.originalEvent.touches;
this.isMouseOver = true;
if (!touches || touches.length == 1) {
e.preventDefault();
this.show(e, true);
}
};
/**
* On move
* @private
* @param {Event} e
*/
EasyZoom.prototype._onMove = function(e) {
if (!this.isOpen) return;
e.preventDefault();
this._move(e);
};
/**
* On leave
* @private
*/
EasyZoom.prototype._onLeave = function() {
this.isMouseOver = false;
this.isOpen && this.hide();
};
/**
* On load
* @private
* @param {Event} e
*/
EasyZoom.prototype._onLoad = function(e) {
// IE may fire a load event even on error so test the image dimensions
if (!e.currentTarget.width) return;
this.isReady = true;
this.$notice.detach();
this.$flyout.html(this.$zoom);
this.$target.removeClass('is-loading').addClass('is-ready');
e.data.call && e.data();
};
/**
* On error
* @private
*/
EasyZoom.prototype._onError = function() {
var self = this;
this.$notice.text(this.opts.errorNotice);
this.$target.removeClass('is-loading').addClass('is-error');
this.detachNotice = setTimeout(function() {
self.$notice.detach();
self.detachNotice = null;
}, this.opts.errorDuration);
};
/**
* Load image
* @private
* @param {String} href
* @param {Function} callback
*/
EasyZoom.prototype._loadImage = function(href, callback) {
var zoom = new Image();
this.$target
.addClass('is-loading')
.append(this.$notice.text(this.opts.loadingNotice));
this.$zoom = $(zoom)
.on('error', $.proxy(this._onError, this))
.on('load', callback, $.proxy(this._onLoad, this));
zoom.style.position = 'absolute';
zoom.src = href;
};
/**
* Move
* @private
* @param {Event} e
*/
EasyZoom.prototype._move = function(e) {
if (e.type.indexOf('touch') === 0) {
var touchlist = e.touches || e.originalEvent.touches;
pointerPositionX = touchlist[0].pageX;
pointerPositionY = touchlist[0].pageY;
} else {
pointerPositionX = e.pageX || pointerPositionX;
pointerPositionY = e.pageY || pointerPositionY;
}
var targetOffset = this.$target.offset();
var relativePositionX = pointerPositionX - targetOffset.left;
var relativePositionY = pointerPositionY - targetOffset.top;
var moveX = Math.ceil(relativePositionX * ratioX);
var moveY = Math.ceil(relativePositionY * ratioY);
// Close if outside
if (moveX < 0 || moveY < 0 || moveX > zoomImgOverlapX || moveY > zoomImgOverlapY) {
this.hide();
} else {
var top = moveY * -1;
var left = moveX * -1;
this.$zoom.css({
top: top,
left: left
});
this.opts.onMove.call(this, top, left);
}
};
/**
* Hide
*/
EasyZoom.prototype.hide = function() {
if (!this.isOpen) return;
if (this.opts.beforeHide.call(this) === false) return;
this.$flyout.detach();
this.isOpen = false;
this.opts.onHide.call(this);
};
/**
* Swap
* @param {String} standardSrc
* @param {String} zoomHref
* @param {String|Array} srcset (Optional)
*/
EasyZoom.prototype.swap = function(standardSrc, zoomHref, srcset) {
this.hide();
this.isReady = false;
this.detachNotice && clearTimeout(this.detachNotice);
this.$notice.parent().length && this.$notice.detach();
this.$target.removeClass('is-loading is-ready is-error');
this.$image.attr({
src: standardSrc,
srcset: $.isArray(srcset) ? srcset.join() : srcset
});
this.$link.attr(this.opts.linkAttribute, zoomHref);
};
/**
* Teardown
*/
EasyZoom.prototype.teardown = function() {
this.hide();
this.$target
.off('.easyzoom')
.removeClass('is-loading is-ready is-error');
this.detachNotice && clearTimeout(this.detachNotice);
delete this.$link;
delete this.$zoom;
delete this.$image;
delete this.$notice;
delete this.$flyout;
delete this.isOpen;
delete this.isReady;
};
// jQuery plugin wrapper
$.fn.easyZoom = function(options) {
return this.each(function() {
var api = $.data(this, 'easyZoom');
if (!api) {
$.data(this, 'easyZoom', new EasyZoom(this, options));
} else if (api.isOpen === undefined) {
api._init();
}
});
};
return EasyZoom;
}));
（函数（根，工厂）{
"严格使用",；
if（typeof define=='function'&&define.amd）{
定义（['jquery']，函数（$）{
工厂(元),；
});
}else if（模块类型==='object'&&module.exports）{
module.exports=（root.EasyZoom=工厂（require（'jquery'））；
}否则{
root.EasyZoom=工厂（root.jQuery）；
}
}（这是函数（$）{
"严格使用",；
var Zoomigx；
var动物重叠；
var ratioX；
var比率；
var pointerPositionX；
var PointerPosition；
var默认值={
//加载缩放图像时要在通知框中显示的文本。
加载通知：“正在加载图像”，
//加载缩放图像时发生错误时在通知框中显示的文本。
errorNotice:'无法加载图像'，
//显示错误通知的时间（毫秒）。
持续时间：2500，
//属性从中检索缩放图像URL。
linkAttribute:'href'，
//防止单击“缩放图像”链接。
对,，
//显示弹出按钮之前要执行的回调函数。
演出前：$.noop，
//要在删除弹出按钮之前执行的回调函数。
beforeHide:$.noop，
//显示弹出按钮时要执行的回调函数。
onShow:$.noop，
//移除弹出按钮时要执行的回调函数。
onHide:$.noop，
//当光标在图像上移动时执行的回调函数。
onMove:$.noop
};
/**
*轻松空间
*@constructor
*@param{Object}目标
*@param{Object}选项（可选）
*/
功能EasyZoom（目标、选项）{
这是.$target=$（target）；
this.opts=$.extend（{}，默认值，选项，this.$target.data（））；
this.isOpen===未定义&&this._init（）；
}
/**
*初始化
*@私人
*/
prototype.\u init=function（）{
this.$link=this.$target.find（'a'）；
this.$image=this.$target.find（'img'）；
此.$弹出框=$（''）；
本.$通知=$（''）；
这是$target.on({
'mousemove.easyzoom touchmove.easyzoom'：$.proxy（this.\u onMove，this），
'mouseleave.easyzoom touchend.easyzoom'：$.proxy（此._onLeave，此），
'mouseenter.easyzoom touchstart.easyzoom'：$.proxy（this.\u onEnter，this）
});
this.opts.preventClicks&&this.target.on（'click.easyzoom'，函数（e）{
e、 预防默认值（）；
});
};
/**
*展示
*@param{MouseEvent|TouchEvent}e
*@param{Boolean}testMouseOver（可选）
*/
EasyZoom.prototype.show=函数（e，testMouseOver）{
var self=这个；
if（this.opts.beforeShow.call（this）==false）返回；
如果（！this.isReady）{
返回此._loadImage（this.$link.attr（this.opts.linkAttribute），function（）{
if（self.isMouseOver | | |！testMouseOver）{
自我表现(e),；
}
});
}
this.$target.append（this.$flyout）；
var targetWidth=this.$target.outerWidth（）；
var targetHeight=this.$target.outerHeight（）；
var flyotinerwidth=this.$flyout.width（）；
var flyotinerheight=此。$flyout.height（）；
var zoomImgWidth=this.$zoom.width（）；
var zoomImgHeight=这个$zoom.height（）；
zoomImgOverlapX=Math.ceil（zoomImgWidth-FlyOutinerWidth）；
zoomImgOverlapY=Math.ceil（zoomImgHeight-FlyOutinerHeight）；
//用于缩放图像小于弹出型按钮元素的情况。
如果（zoomImgOverlapX<0）zoomImgOverlapX=0；
如果（zoomImgOverlapY<0）zoomImgOverlapY=0；
ratioX=zoomImgOverlapX/targetWidth；
比率=缩放重叠/目标光；
this.isOpen=真；
this.opts.onShow.call（this）；
移动（e）；
};
/**
*进入时
*@私人
*@param{Event}e
*/
EasyZoom.prototype.\u onEnter=函数（e）{
var-touchs=e.originalEvent.touchs；
this.isMouseOver=true；
如果（！toachs | | toachs.length==1）{
e、 预防默认值（）；
这个。显示（e，真）；
}
};
/**
*移动中
*@私人
*@param{Event}e
*/
EasyZoom.prototype.\u onMove=函数（e）{
如果（！this.isOpen）返回；
e、 预防默认值（）；
这项动议（e）；
};
/**
*休假
*@私人
*/
prototype.\u onLeave=function（）{
this.isMouseOver=false；
this.isOpen&&this.hide（）；
};
/**
*装载
*@私人
*@param{Event}e
*/
EasyZoom.prototype.\u onLoad=函数（e）{
//IE即使出错也可能触发加载事件，因此请测试图像尺寸
如果（！e.currentTarget.width）返回；
this.isReady=true；
此.$notice.detach（）；
(function (root, factory) {
'use strict';
if(typeof define === 'function' && define.amd) {
define(['jquery'], function($){
factory($);
});
} else if(typeof module === 'object' && module.exports) {
module.exports = (root.EasyZoom = factory(require('jquery')));
} else {
root.EasyZoom = factory(root.jQuery);
}
}(this, function ($) {
'use strict';
var zoomImgOverlapX;
var zoomImgOverlapY;
var ratioX;
var ratioY;
var pointerPositionX;
var pointerPositionY;
var defaults = {
// The text to display within the notice box while loading the zoom image.
loadingNotice: 'Loading image',
// The text to display within the notice box if an error occurs when loading the zoom image.
errorNotice: 'The image could not be loaded',
// The time (in milliseconds) to display the error notice.
errorDuration: 2500,
// Attribute to retrieve the zoom image URL from.
linkAttribute: 'href',
// Prevent clicks on the zoom image link.
preventClicks: true,
// Callback function to execute before the flyout is displayed.
beforeShow: $.noop,
// Callback function to execute before the flyout is removed.
beforeHide: $.noop,
// Callback function to execute when the flyout is displayed.
onShow: $.noop,
// Callback function to execute when the flyout is removed.
onHide: $.noop,
// Callback function to execute when the cursor is moved while over the image.
onMove: $.noop
};
/**
* EasyZoom
* @constructor
* @param {Object} target
* @param {Object} options (Optional)
*/
function EasyZoom(target, options) {
this.$target = $(target);
this.opts = $.extend({}, defaults, options, this.$target.data());
this.isOpen === undefined && this._init();
}
/**
* Init
* @private
*/
EasyZoom.prototype._init = function() {
this.$link = this.$target.find('a');
this.$image = this.$target.find('img');
this.$flyout = $('<div class="easyzoom-flyout" />');
this.$notice = $('<div class="easyzoom-notice" />');
this.$target.on({
'mousemove.easyzoom touchmove.easyzoom': $.proxy(this._onMove, this),
'mouseleave.easyzoom touchend.easyzoom': $.proxy(this._onLeave, this),
'mouseenter.easyzoom touchstart.easyzoom': $.proxy(this._onEnter, this)
});
this.opts.preventClicks && this.$target.on('click.easyzoom', function(e) {
e.preventDefault();
});
};
/**
* Show
* @param {MouseEvent|TouchEvent} e
* @param {Boolean} testMouseOver (Optional)
*/
EasyZoom.prototype.show = function(e, testMouseOver) {
var self = this;
if (this.opts.beforeShow.call(this) === false) return;
if (!this.isReady) {
return this._loadImage(this.$link.attr(this.opts.linkAttribute), function() {
if (self.isMouseOver || !testMouseOver) {
self.show(e);
}
});
}
this.$target.append(this.$flyout);
var targetWidth = this.$target.outerWidth();
var targetHeight = this.$target.outerHeight();
var flyoutInnerWidth = this.$flyout.width();
var flyoutInnerHeight = this.$flyout.height();
var zoomImgWidth = this.$zoom.width();
var zoomImgHeight = this.$zoom.height();
zoomImgOverlapX = Math.ceil(zoomImgWidth - flyoutInnerWidth);
zoomImgOverlapY = Math.ceil(zoomImgHeight - flyoutInnerHeight);
// For when the zoom image is smaller than the flyout element.
if (zoomImgOverlapX < 0) zoomImgOverlapX = 0;
if (zoomImgOverlapY < 0) zoomImgOverlapY = 0;
ratioX = zoomImgOverlapX / targetWidth;
ratioY = zoomImgOverlapY / targetHeight;
this.isOpen = true;
this.opts.onShow.call(this);
e && this._move(e);
};
/**
* On enter
* @private
* @param {Event} e
*/
EasyZoom.prototype._onEnter = function(e) {
var touches = e.originalEvent.touches;
this.isMouseOver = true;
if (!touches || touches.length == 1) {
e.preventDefault();
this.show(e, true);
}
};
/**
* On move
* @private
* @param {Event} e
*/
EasyZoom.prototype._onMove = function(e) {
if (!this.isOpen) return;
e.preventDefault();
this._move(e);
};
/**
* On leave
* @private
*/
EasyZoom.prototype._onLeave = function() {
this.isMouseOver = false;
this.isOpen && this.hide();
};
/**
* On load
* @private
* @param {Event} e
*/
EasyZoom.prototype._onLoad = function(e) {
// IE may fire a load event even on error so test the image dimensions
if (!e.currentTarget.width) return;
this.isReady = true;
this.$notice.detach();
this.$flyout.html(this.$zoom);
this.$target.removeClass('is-loading').addClass('is-ready');
e.data.call && e.data();
};
/**
* On error
* @private
*/
EasyZoom.prototype._onError = function() {
var self = this;
this.$notice.text(this.opts.errorNotice);
this.$target.removeClass('is-loading').addClass('is-error');
this.detachNotice = setTimeout(function() {
self.$notice.detach();
self.detachNotice = null;
}, this.opts.errorDuration);
};
/**
* Load image
* @private
* @param {String} href
* @param {Function} callback
*/
EasyZoom.prototype._loadImage = function(href, callback) {
var zoom = new Image();
this.$target
.addClass('is-loading')
.append(this.$notice.text(this.opts.loadingNotice));
this.$zoom = $(zoom)
.on('error', $.proxy(this._onError, this))
.on('load', callback, $.proxy(this._onLoad, this));
zoom.style.position = 'absolute';
zoom.src = href;
};
/**
* Move
* @private
* @param {Event} e
*/
EasyZoom.prototype._move = function(e) {
if (e.type.indexOf('touch') === 0) {
var touchlist = e.touches || e.originalEvent.touches;
pointerPositionX = touchlist[0].pageX;
pointerPositionY = touchlist[0].pageY;
} else {
pointerPositionX = e.pageX || pointerPositionX;
pointerPositionY = e.pageY || pointerPositionY;
}
var targetOffset = this.$target.offset();
var relativePositionX = pointerPositionX - targetOffset.left;
var relativePositionY = pointerPositionY - targetOffset.top;
var moveX = Math.ceil(relativePositionX * ratioX);
var moveY = Math.ceil(relativePositionY * ratioY);
// Close if outside
if (moveX < 0 || moveY < 0 || moveX > zoomImgOverlapX || moveY > zoomImgOverlapY) {
this.hide();
} else {
var top = moveY * -1;
var left = moveX * -1;
this.$zoom.css({
top: top,
left: left
});
this.opts.onMove.call(this, top, left);
}
};
/**
* Hide
*/
EasyZoom.prototype.hide = function() {
if (!this.isOpen) return;
if (this.opts.beforeHide.call(this) === false) return;
this.$flyout.detach();
this.isOpen = false;
this.opts.onHide.call(this);
};
/**
* Swap
* @param {String} standardSrc
* @param {String} zoomHref
* @param {String|Array} srcset (Optional)
*/
EasyZoom.prototype.swap = function(standardSrc, zoomHref, srcset) {
this.hide();
this.isReady = false;
this.detachNotice && clearTimeout(this.detachNotice);
this.$notice.parent().length && this.$notice.detach();
this.$target.removeClass('is-loading is-ready is-error');
this.$image.attr({
src: standardSrc,
srcset: $.isArray(srcset) ? srcset.join() : srcset
});
this.$link.attr(this.opts.linkAttribute, zoomHref);
};
/**
* Teardown
*/
EasyZoom.prototype.teardown = function() {
this.hide();
this.$target
.off('.easyzoom')
.removeClass('is-loading is-ready is-error');
this.detachNotice && clearTimeout(this.detachNotice);
delete this.$link;
delete this.$zoom;
delete this.$image;
delete this.$notice;
delete this.$flyout;
delete this.isOpen;
delete this.isReady;
};
// jQuery plugin wrapper
$.fn.easyZoom = function(options) {
return this.each(function() {
var api = $.data(this, 'easyZoom');
if (!api) {
$.data(this, 'easyZoom', new EasyZoom(this, options));
} else if (api.isOpen === undefined) {
api._init();
}
});
};
return EasyZoom;
}));