2017年6月14号课堂笔记

2017年6月14号 星期三 晴 空气质量:中度污染~良

内容:JavaScript:style

jQuery:hover,toggle,text和html,focus和blur,节点的操作

代课老师:李老师

备注:今天的课程讲的有点儿缺乏逻辑性,所以尽量记录下来吧~

一、JavaScript的style

老师代码:

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>style样式</title>
 <style type="text/css">
     .title{
         border:1px solid red;
          200px;
         height:200px;
         background-color: yellowgreen
     }

 </style>

    <script type="text/javascript">
    window.onload=function(){
         var  dom= document.getElementById("text");
      /*
      alert(1);
        //改变
        dom.style.backgroundColor="pink";
        dom.style.marginLeft="200px";
        dom.style.display="none";*/

        dom.className="title";
    }

    </script>
</head>
<body>
</body>
<div id="text"   style="border: 1px solid red"></div>
</html>

二、hover

老师代码:

<!DOCTYPE HTML>
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript" src="js/jquery-1.10.2.min.js"></script>
<script type="text/javascript">
    $(function() { 
    //鼠标的移入移出  hover
       $("input").hover(function(){
          alert("mouseover");
       },function(){
         alert("mouseout");
       })
      
    
    });
</script>
</head>
<body>
  <input  type="button"  value="hover">
</body>
</html>

三、toggle

老师代码:

<!DOCTYPE HTML>
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
<script type="text/javascript">
    $(function() { 
      //事件循环执行     1.9之后 废除的属性
      $("input").toggle(function(){
        $("body").css("background","green");},
       function(){
        $("body").css("background","red");},
        function(){
        $("body").css("background","pink");
      })
    
    });
</script>
</head>
<body>
  <input  type="button"  value="toggle">
</body>
</html>

四、text和html

老师代码:

<!DOCTYPE HTML>
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript" src="js/jquery-1.10.2.min.js"></script>
<script type="text/javascript">
    $(function() { 
     $("[type='button']").click(function(){
       // $("div").html("<h1>小猫咪消失了...</h1>");  innerHtml
      $("div").text("<h1>小猫咪消失了...</h1>");   //innerText
     })
    
    });
</script>
</head>
<body>
   <button type="button">点击更换</button>
  <div><img src="images/cat.jpg"></img></div>
</body>
</html>

五、focus和blur

老师代码:

<!DOCTYPE HTML>
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript" src="js/jquery-1.10.2.min.js"></script>
<script type="text/javascript">
    $(function() { 
       //获取焦点
       $("input").focus(function(){
         if($(this).val()=="请输入用户名"){
            $(this).val("已经输入");
         }
       })
       //失去焦点
         $("input").blur(function(){
         if($(this).val()=="已经输入"){
            $(this).val("请输入用户名");
         }
       })
       
    
    });
</script>
</head>
<body>
     用户名:<input type="text"  value="请输入用户名">
</body>
</html>

六、节点的操作

老师代码:

<!DOCTYPE HTML>
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript" src="js/jquery-1.10.2.min.js"></script>
<script type="text/javascript">
    $(function() { 
      
    
    //创建子节点
    var $newNode=$("<li>节点6</li>");
    //把节点后置到ul中
    //$("ul").append($newNode);    $newNode.appendTo($("ul"));
    //把节点前置到ul中
    //$("ul").prepend($newNode);   $newNode.prependTo($("ul"));
     
     //创建同辈元素节点
     var $newUl=$("<ul style='list-style:none'><li>同辈的元素</li></ul>");
     //后置同辈节点
     //$("ul").after($newUl);    $newUl.insertAfter($("ul"));
     //前置同辈节点
     // $("ul").before($newUl);    $newUl.insertBefore($("ul"));
     
     
     //替换指定的节点   节点4   替换了  节点2  $("li:eq(1)").replaceWith($("li:eq(3)"));
     
     //替换所有的   节点2  替换了  节点4    $("li:eq(1)").replaceAll($("li:eq(3)"));
     $("li:eq(3)").click(function(){  //复制  节点的同时   也绑定了 对应的事件
       alert("haha");
     })
     $("li:eq(3)").clone(true).appendTo("ul");
     
    });
</script>
</head>
<body>
     
      <ul style="list-style:none">
      <li>节点1</li>
      <li>节点2</li>
      <li>节点3</li>
      <li>节点4</li>
      <li>节点5</li>
      </ul>     
     
</body>
</html>

七、老师辛苦了!

原文地址:https://www.cnblogs.com/wsnedved2017/p/7009076.html