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jquery plug in jquery.LightBox.js to achieve the enlarged picture and click the left and right switch effect of attached to demo source download

  • 2021-01-06 00:28:16
  • OfStack

jquery.LightBox.js This article describes the example of jquery plug-in jquery.LightBox.js to enlarge the image and click left and right to switch the effect. To share with you for your reference, as follows:

This plugin is written by the author of this article, with the purpose of improving the author's js capability, and also providing some convenience for beginners of js when using the plugin, so that the old birds can fly leisurely.

This plugin aims to achieve the current more popular click enlarge picture and click left and right to switch picture effect, you can according to their actual needs to set whether to add the effect of left and right to switch picture. The overall code is as follows: 


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title> Untitled document </title>
<style>
*{margin:0;padding:0;}
li{list-style:none;}
.item{margin:20px;}
.item ul li{float:left;margin-right:20px;}
.item ul li img{width:100px;cursor:pointer;}
.lb_wrap{display:none;}
.lightbox_bg{background:#000;filter:alpha(opacity=70);opacity:.7;position:absolute;left:0;top:0;width:100%;height:100%;z-index:1;}
.lightbox{position:absolute;left:0;top:50%;width:100%;z-index:2;text-align:center;}
.lightbox p{position:absolute;height:61px;width:38px;top:50%;left:0;z-index:2;background:transparent url(themes.png) no-repeat left top;margin-top:-30.5px;cursor:pointer;}
.lightbox p.next{left:auto;background-position:right top;right:0;}
</style>
<script type="text/javascript" src="jquery-1.7.1.js"></script>
<script type="text/javascript" src="jquery.LightBox.js"></script>
</head>
<body>
<div class="item">
 <ul>
  <li><img src="01.jpg" /></li>
  <li><img src="02.jpg" /></li>
  <li><img src="03.jpg" /></li>
  <li><img src="04.jpg" /></li>
  <li><img src="05.jpg" /></li>
  <li><img src="06.jpg" /></li>
 </ul>
</div>
<script>
$(function(){
  $(".item").LightBox({
    controls : true // on 1 Zhang, 1 The default is to display the button true
    });
  })
</script>
</body>
</html>

jquery.LightBox.js 


/*
*LightBox 1.0
*dependence jquery-1.7.1.js
*/
;(function(a){
  a.fn.LightBox = function(options){
    var defaults = {
      controls : true // on 1 Zhang, 1 The default is to display the button true
      }
    var opts = a.extend(defaults, options);
    var lb_wrap = '<div class="lb_wrap"><div class="lightbox_bg"></div><div class="lightbox"><img src="loading.gif" class="lg_img"></div></div>';
    a("body").append(lb_wrap);
    //controls
    if(opts.controls){
      a(".lightbox").append('<p class="prev"></p><p class="next"></p>');
      }
    function imgobj(obj1, obj2){
      //imgObj.height Is through the img Object to get the actual height of the image 
      var imgObj = new Image();
      imgObj.src = obj1.attr("src");
      var margintop = 0 - (imgObj.height)/2;
      obj2.css("margin-top",margintop);
      }
    this.each(function(){
      var obj = a(this);
      var numpic = obj.find("li").length;
      var num = 0;
      // Click Assign and display 
      obj.find("img").click(function(){
        var src = a(this).attr("src");
        a(".lg_img").attr("src",src);
        imgobj(a(".lg_img"), a(".lightbox"));
        a(".lb_wrap").fadeIn();
        a(".lg_img").fadeIn();
        a(".prev").fadeIn().siblings(".next").fadeIn();
        num = a(this).parent().index();  // Gets the index of the parent element of the current image and assigns to num Click Up for the next 1 Zhang, 1 A service 
        });
      // on 1 zhang 
      a(".prev").click(function(){
        if(num == 0){
           num = numpic;
         }
        var src = obj.find("li").eq(num-1).find("img").attr("src");
        a(".lg_img").attr("src",src);
        imgobj(a(".lg_img"), a(".lightbox"));
        num--;
        });
      // Under the 1 zhang 
      a(".next").click(function(){
        if(num == numpic-1){
           num = -1;
        }
        var src = obj.find("li").eq(num+1).find("img").attr("src");
        a(".lg_img").attr("src",src);
        imgobj(a(".lg_img"), a(".lightbox"));
        num++;
        });
      // Click on except on 1 Zhang, 1 Hide in other places outside Zhang 
      a(".lb_wrap").click(function(e){
         var e = e || window.event;
         var elem = e.target || e.srcElement;
         while(elem){
           if (elem.className && elem.className.indexOf('prev')>-1) {
             return;
           }
           if(elem.className && elem.className.indexOf('next')>-1){
             return;
             }
           elem = elem.parentNode;
         }
         a(this).find("img").attr("src","loading.gif").hide(); // After hiding, assign the default image to lightbox In the picture src
         a(this).find(".prev").hide().siblings(".next").hide();
         a(this).fadeOut();
        });
      })
    }
})(jQuery);

Complete example code click here site download.

Readers who are interested in more jQuery related content can check out the special features of this site: jQuery Drag and drop effects and techniques summary, jQuery Expansion techniques summary, jQuery common classic effects summary, jQuery animation and effects usage summary and jquery selector method summary.

I hope this article is helpful to jQuery program design.

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