需要幫助實現 EasyZoom jquery 插件
[英]Need help implementing EasyZoom jquery plugin
問題描述
總的來說，我對 jquery 和 javascript 不太熟悉，所以請耐心等待。 但是，我正在嘗試使用 EasyZoom 創建一個帶有縮放功能的圖片庫： https ://i-like-robots.github.io/EasyZoom/。 我想實現類似於鏈接中“帶有縮略圖”的內容。
到目前為止，我已經創建了帶有圖像的 div，從 GitHub 復制了 CSS 和 javascript 文件，並將我的 HTML 頁面鏈接到它們，請參閱下面的特定代碼。
但是，我顯然在這里遺漏了一些東西。 在 JS 文件中，我找到了一個地方，它說@param {Object} target我應該在 HTML 中指定需要 Easyzoom 的對象嗎？ 如果是這樣，如何？ 我也很困惑如何指定我想要一個帶有 Easyzoom 的圖片庫。 所以，如果有人能幫我解決這個問題，那就太好了。
HTML 代碼（我有一個圖像鏈接列表，這些鏈接是從“圖像”下的 Django 模型中獲得的）
{% for image in images %}
<div class="slides">
<div class="easyzoom">
<a href="{{image}}">
<img src="{{image}}">
</a>
</div>
</div>
{% endfor %}
Easyzoom.css
/**
* 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;
}
Easyzoom.js
(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;
}));
js 和 CSS 文件基本上是 Github 上內容的精確副本： https : //github.com/i-like-robots/EasyZoom
1 個解決方案
解決方案1
0 已采納 2020-10-21 22:25:20
當您已經在使用 jQuery 時，如何將Slick用於您的滑塊並將EasyZoom集成到您的Slick幻燈片中？
大量很酷的功能，檢查它... https://kenwheeler.github.io/slick/
我們可以利用slick 的 dots將 dot 按鈕操作成圖像縮略圖，所以原始標記中沒有額外的 html 👍🏼
閱讀我在下面的工作示例和 jsfiddle 中的評論。
請注意，easyzoom 不會放大很多，因為我們使用的演示圖像本身只有 600 像素寬。
jsFiddle 版本... https://jsfiddle.net/joshmoto/mdkpnw7g/
工作堆棧示例...
// document ready $(document).ready(function() { // init ez-slider with slick $('.ez-slider').on('init', function(slick) { // slide var for use timeout const slider = this; // slight delay so slick init completes render setTimeout(function() { // init the easy zoom on slider $('FIGURE', slider).addClass('easyzoom').easyZoom(); // thumb buttons let thumbs = $('.slick-dots > LI > BUTTON', slider); // each thumbnail button function $.each(thumbs, function(i, e) { // slide id let slide_id = $(this).attr('aria-controls'); // get thumbnail image src let thumb_img = $('#' + slide_id).find('IMG').attr('src'); // change thumb button inner html too $(this).html('<img src="' + thumb_img + '" alt="" />'); }); }, 100); // then our slick options }).slick({ slidesToShow: 1, slidesToScroll: 1, dots: true, arrows: false, adaptiveHeight: true, autoplay: false }); });
BODY { margin: 0; padding: 20px; } /* The minor fix I added to get demo working */ .ez-slider .easyzoom .easyzoom-flyout { top: 0; left: 0; right: 0; bottom: 0; } /* Slide demo css not needed */ .ez-slider { max-width: 400px; margin: 0 auto 20px auto !important; } .ez-slider FIGURE { margin: 0; display: block; position: relative; overflow: hidden; } .ez-slider FIGURE > A { height: auto; display: block; width: 100%; } .ez-slider FIGURE > A > IMG { height: auto; width: 100%; display: block; } .ez-slider .slick-dots { margin: 10px -5px 0 -5px; position: relative; bottom: 0; width: auto; display: block; } .ez-slider .slick-dots LI { width: calc(20% - 10px); height: auto; margin: 0 0 10px 0; padding: 0 5px 0 5px; display: inline-block; } .ez-slider .slick-dots LI.slick-active BUTTON, .ez-slider .slick-dots LI:hover BUTTON { opacity: 1; } .ez-slider .slick-dots LI BUTTON { overflow: hidden; position: relative; height: auto; padding: 0; transition: all .5s ease; width: 100%; opacity: .8; } .ez-slider .slick-dots LI BUTTON IMG { display: block; height: 100%; position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); } .ez-slider .slick-dots LI BUTTON:before { display: block; position: relative; content: ''; width: 100%; padding-top: 100%; height: auto; }
<!-- space slider html --> <div class="ez-slider"> <figure> <a href="https://i.imgur.com/q5Y5RCH.png"> <img src="https://i.imgur.com/q5Y5RCH.png" alt="" /> </a> </figure> <figure> <a href="https://i.imgur.com/8HjXPXD.png"> <img src="https://i.imgur.com/8HjXPXD.png" alt="" /> </a> </figure> <figure> <a href="https://i.imgur.com/vUDcfcy.png"> <img src="https://i.imgur.com/vUDcfcy.png" alt="" /> </a> </figure> <figure> <a href="https://i.imgur.com/okTDHas.png"> <img src="https://i.imgur.com/okTDHas.png" alt="" /> </a> </figure> </div> <!-- ocean slider html --> <div class="ez-slider"> <figure> <a href="https://i.imgur.com/x7ZYW4i.png"> <img src="https://i.imgur.com/x7ZYW4i.png" alt="" /> </a> </figure> <figure> <a href="https://i.imgur.com/EYTCssm.png"> <img src="https://i.imgur.com/EYTCssm.png" alt="" /> </a> </figure> <figure> <a href="https://i.imgur.com/3sAFPmL.png"> <img src="https://i.imgur.com/3sAFPmL.png" alt="" /> </a> </figure> </div> <!-- landscape slider html --> <div class="ez-slider"> <figure> <a href="https://i.imgur.com/IqLrd0o.png"> <img src="https://i.imgur.com/IqLrd0o.png" alt="" /> </a> </figure> <figure> <a href="https://i.imgur.com/6JplNl6.png"> <img src="https://i.imgur.com/6JplNl6.png" alt="" /> </a> </figure> <figure> <a href="https://i.imgur.com/6X5GKWJ.png"> <img src="https://i.imgur.com/6X5GKWJ.png" alt="" /> </a> </figure> <figure> <a href="https://i.imgur.com/SefTwI1.png"> <img src="https://i.imgur.com/SefTwI1.png" alt="" /> </a> </figure> <figure> <a href="https://i.imgur.com/qBmDrTU.png"> <img src="https://i.imgur.com/qBmDrTU.png" alt="" /> </a> </figure> </div> <!-- Include Slick CSS library --> <link href="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.8.1/slick.min.css" rel="stylesheet"/> <!-- Include Slick Theme CSS library --> <link href="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.8.1/slick-theme.min.css" rel="stylesheet"/> <!-- Include EasyZoom CSS library --> <link href="https://cdn.jsdelivr.net/npm/easyzoom@2.5.3/css/easyzoom.css" rel="stylesheet"/> <!-- Include jQuery library --> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <!-- Include Slick JS library after jQuery --> <script src="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.8.1/slick.min.js"></script> <!-- Include EasyZoom JS library after jQuery --> <script src="https://cdn.jsdelivr.net/npm/easyzoom@2.5.3/src/easyzoom.js"></script> <!-- Make sure you run all your custom JS after libraries -->
easyzoom jQuery插件出現問題
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