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AngularJS实现的回到顶部指令功能实例代码

本文实例讲述了AngularJS实现的回到顶部指令功能。分享给大家供大家参考,具体如下: <!DOCTYPE html> <html lang="z...

本文实例讲述了AngularJS实现的回到顶部指令功能。分享给大家供大家参考,具体如下:

<!DOCTYPE html>
<html lang="zh-CN">
 <head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="bootstrap.min.css" rel="external nofollow" >
  <script src="jquery.min.js"></script>
  <script src="angular.js"></script>
  <script src="bootstrap.min.js"></script>
  <style type="text/css">
   #gotoTop {
    display: none;
    position: fixed;
    top: 80%;
    left: 90%;
    cursor: pointer;
    padding: 4px 4px;
    width: 50px;
    border: 1px solid #e0e0e0;
    background: #fff;
    border-radius: 50px;
    height: 50px;
   }
   #gotoTop.hover {
    background: #e0e0e0;
    color: #fff;
    text-decoration: none;
   }
   .arrow {
    width: 0;
    height: 0;
    margin: 0 auto;
    border: 9px solid transparent;
    border-bottom-color: #aaa;
   }
   .stick {
    width: 8px;
    height: 14px;
    margin: 0 auto;
    border-radius: 1px;
    background-color: #aaa;
   }
  </style>
  <script type="text/javascript">
      var myapp = angular.module(‘myapp‘, []);
      myapp.directive("goToTop", function() {
       return {
        restrict: ‘E‘,
        replace: true,
        scope: {
         minHeight : ‘@‘
        },
        templateUrl : ‘tmpl.html‘,
        link: function(scope, elem, attrs) {
         elem.click(function() {
          jQuery(‘html,body‘).animate({scrollTop:0}, 700);
         })
         .hover(function() {
          jQuery(this).addClass("hover");
         }, function() {
          jQuery(this).removeClass("hover");
         });
         scope.minHeight = scope.minHeight ? scope.minHeight : 600;
         jQuery(window).scroll(function() {
           var s = jQuery(window).scrollTop();
           if( s > scope.minHeight) {
             jQuery("#gotoTop").fadeIn(100);
           } else {
             jQuery("#gotoTop").fadeOut(200);
           };
         });
        }
       };
      });
  </script>
 </head>
 <body ng-app="myapp">
   <go-to-top min-height="800"></go-to-top>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
   <h1>hello world</h1>
 </body>
</html>

tmpl.html

<div id="gotoTop" title="返回顶部">
 <div class="arrow"></div>
 <div class="stick"></div>
</div>