HTML DOM Map用法及代码示例

HTML DOM中的Map Object用于创建和访问<map>元素。Map对象会创建可点击和可访问的图像部分。

用法:

它用于返回Map对象。

var x = document.getElementById("myMap");

它用于创建Map对象。
```
var x = document.createElement("MAP");
```

属性值：

name:它用于设置或返回image-map的名称属性的值。

集合值：

领域：它用于返回image-map中所有<area>元素的集合。
图片：它用于返回与image-map关联的所有<img>和<object>元素的集合。

范例1：本示例说明了用于访问<map>元素的getElementById()方法。

<!DOCTYPE html> 
<html> 
  
<head> 
    <title>  
        HTML DOM Map Object Property  
    </title> 
</head> 
  
<body> 
      
    <h4>Click the button</h4> 
      
    <button onclick = "GFG()"> 
        Click Here! 
    </button> 
      
    <p></p> 
      
    <map id = "Geeks" name = "Geeks"> 
          
        <area  = "rect" coords = "0, 0, 110, 100"
        alt = "Geeks" href =  
"https://media.geeksforgeeks.org/wp-content/uploads/a1-21.png"> 
  
        <area shape = "rect" coords = "110, 0, 190, 100"
        alt = "For" href = 
"https://media.geeksforgeeks.org/wp-content/uploads/a1-22.png"> 
  
        <area shape = "rect" coords = "190, 0, 300, 100"
        alt = "GEEKS" href = 
"https://media.geeksforgeeks.org/wp-content/uploads/a1-24.png"> 
    </map> 
      
    <img src = 
"https://media.geeksforgeeks.org/wp-content/uploads/a1-25.png"
    width = "300" height = "100" alt="GFG" usemap = "#Geeks"> 
      
    <p id = "GEEK!"></p> 
      
    <script> 
        function GFG() { 
            var x = document.getElementById("Geeks").areas.length; 
            document.getElementById("GEEK!").innerHTML = x; 
        } 
    </script> 
</body
  
</html>

输出：

范例2：本示例介绍了用于创建<map>元素的document.createElement()方法。

<!DOCTYPE html> 
<html> 
      
<head> 
    <title>  
        HTML DOM Map Object Property  
    </title> 
</head> 
      
<body> 
    <h4>Click the button</h4> 
      
    <button onclick = "GFG()"> 
        Click Here! 
    </button> 
      
    <p></p> 
      
    <img src =  
"https://media.geeksforgeeks.org/wp-content/uploads/a1-25.png"
    width = "300" height = "100" usemap = "#myMap"> 
      
    <p id = "GEEK!"></p> 
      
    <!-- script to use map object property -->
    <script> 
        function GFG() { 
            var x = document.createElement("MAP"); 
            x.setAttribute("id", "myMap"); 
            x.setAttribute("name", "myMap"); 
            document.body.appendChild(x); 
  
            var y = document.createElement("AREA"); 
            y.setAttribute("href",  
"https://media.geeksforgeeks.org/wp-content/uploads/a1-24.png"); 
            y.setAttribute("shape", "rect"); 
            y.setAttribute("coords", "190, 0, 300, 100"); 
            document.getElementById("myMap").appendChild(y); 
  
            document.getElementById("GEEK!").innerHTML =  
            "Click on the GEEKS area in the image."; 
        }      
    </script> 
</body> 
  
</html>

输出：

支持的浏览器：下面列出了DOM Map Object属性支持的浏览器：

谷歌浏览器5.0
Internet Explorer 8.0
Firefox 3.6
Safari 5.0
Opera 10.6

相关用法

注：本文由纯净天空筛选整理自SHUBHAMSINGH10大神的英文原创作品 HTML | DOM Map Object。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。