CSS之提示框实现

效果图：
注意以下要点：

1、提示框的箭头效果，且箭头随位置变动。

2、提示框的关闭按钮，且提示框内容高度随意。

3、阴影效果

测试网址：
https://www.w3schools.com/cssref/tryit.asp?filename=trycss3_box-shadow

代码：
<!DOCTYPE HTML>  
<HTML>  
<HEAD>  
	<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
    
    <script>
    	$(function(){
        	function showTip(flag){
            	var tip = $("div.tool-tip-content-wrapper, div.tool-tip-info-border");
                if(flag) tip.show();
                else tip.hide();
            }
        	$("span.tool-tip-info").on("click",function(){
            	showTip(true);
            });
       	    $("div.tip-content-btn").on("click",function(){
            	showTip(false);
            });
        });
    
    </script>

<style>  

	.tool-tip-info-border{
    	display:none;
    }
    
    
 	.tool-tip-info-border-b{  
           border-top-color: #fff; 
            border-left-color: transparent;  
            border-right-color: transparent;  
            border-bottom-color: transparent;  
            border-style: dashed dashed solid;  
            border-width: 8px;
            position: absolute;  
            top: -12px;  
            left: -2px;  
            z-index:2000;
            height: 0;  
            width: 0;  
         
    }
    .tool-tip-info-border-a{  
            border-top-color: #aaa; 
            border-left-color: transparent;  
            border-right-color: transparent;  
            border-bottom-color:transparent;  
            border-style: dashed dashed solid;  
            border-width: 8px;  
            position: absolute; 
            top: -11px;  
            left: -2px;  
            z-index:2000;
            height: 0;  
            width: 0; 
    }  
    
    .tool-tip-content {  
            background: #fff;  
            border: 1px solid #ccc;  
            border-color: rgba(0,0,0,.2);  
            -webkit-box-shadow: 0 2px 10px rgba(0,0,0,.2);  
            box-shadow: 0 2px 10px rgba(0,0,0,.2);  
            outline: none;  
            overflow: hidden;  
            position: absolute;  
            left: 0px;  
            bottom: 7px;  
            -webkit-animation: gb__a .2s;  
            animation: gb__a .2s;  
            -webkit-border-radius: 2px;  
            border-radius: 2px;  
            -webkit-user-select: text;  
            width:360px;  
            height:auto;  
            padding:15px;  
            font: 13px 'Lato',sans-serif;
            color:rgb(51,51,51);
            box-sizing: border-box;
    }  
   
   
   .tool-tip-info{
   		position:relative;
        display:inline-block;
        width:13px;
        height:13px;
        text-align:center;
        line-height:13px;
        border: 1px solid #407bae;
        border-radius:10px;
        color:#407bae;
        font: 12px 'Lato',sans-serif;
        cursor:pointer;
   } 
  
  
  
  .tip-content-btn{
  		position:absolute;
        top:2px;
        right:2px;
        width:13px;
        height:13px;
        cursor:pointer;
  }
  
  .tip-content-btn:before{
  		position:absolute;
        top:1px;
        left:3px;
        width:1px;
        height:15px;
        background-color:#888;
        transform: rotate(-45deg);
        -webkit-transform: rotate(-45deg);
        -moz-transform: rotate(-45deg);
        -ms-transform: rotate(-45deg);
        -o-transform: rotate(-45deg);
        content:"";
  }
  
  .tip-content-btn:hover:before{
  		background-color:#333;
  }
  
  .tip-content-btn:after{
  		position:absolute;
        top:1px;
        left:3px;
        width:1px;
        height:15px;
        background-color:#888;
        transform: rotate(45deg);
        -webkit-transform: rotate(45deg);
        -moz-transform: rotate(45deg);
        -ms-transform: rotate(45deg);
        -o-transform: rotate(45deg);
        content:"";
  }
  
  .tip-content-btn:hover:after{
  		background-color:#333;
  }
  
  .tool-tip-content-wrapper{
  		position:relative !important;
    	height:0px;
        display:none;
        z-index:1000;
  }
      
</style>  
</HEAD>  
<BODY>  
<p>Paragraph A</p>
<p>Paragraph B</p>
<p>Paragraph C</p>
<p>Paragraph D</p>
<p>Paragraph E</p>
<p>Paragraph F</p>
<p>Paragraph G</p>

<div class="tool-tip-content-wrapper"> 
    <div class="tool-tip-content"> 
    	<div class="tip-content-msg">
        	Providing your last name adds another 
        	layer of security and keeps your World Of Tester profile protected.
        </div>
    	<div class="tip-content-btn"></div>
    </div>
</div> 

<div>
	Last Name: 
	<span class="tool-tip-info">
    	<span>i</span>
        <div class="tool-tip-info-border">
        	<div class="tool-tip-info-border-a"></div>  
 			<div class="tool-tip-info-border-b"></div>
        </div>
    </span>
</div>

<hr/>





<!--======== TEST CODE ONLY :::::::: Test Begin =========== -->
<p>Paragraph A</p>
<p>Paragraph B</p>
<p>Paragraph C</p>
<p>Paragraph D</p>
<p>Paragraph E</p>
<p>Paragraph F</p>
<p>Paragraph G</p>

<div class="tool-tip-content-wrapper"> 
    <div class="tool-tip-content"> 
    	<div class="tip-content-msg">
        	Providing your last name adds another 
        	layer of security and keeps your World Of Tester profile protected.
            Providing your last name adds another 
        	layer of security and keeps your World Of Tester profile protected.
            Providing your last name adds another 
        	layer of security and keeps your World Of Tester profile protected.
            Providing your last name adds another 
        	layer of security and keeps your World Of Tester profile protected.
        </div>
    	<div class="tip-content-btn"></div>
    </div>
</div> 

<div>
	Longer - Last Name: 
	<span class="tool-tip-info">
    	<span>i</span>
        <div class="tool-tip-info-border">
        	<div class="tool-tip-info-border-a"></div>  
 			<div class="tool-tip-info-border-b"></div>
        </div>
    </span>
</div>

<!--======== TEST CODE ONLY :::::::: Test End =========== -->


<BODY>  
</HTML>
转载请注明，
原文出处：http://lixh1986.iteye.com/blog/2387980

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