Javascript DOM HTML Area protocol Property set

Introduction

The protocol property sets or gets the protocol of the href attribute value.

Property Values of protocol:

  • file:
  • ftp:
  • http:
  • https:
  • mailto:
  • etc..

Change the protocol part of a specific area in an image-map: 

document.getElementById("myArea").protocol = "mailto:";

Click the button to change the protocol of the href attribute for the myArea area in the image-map.

View in separate window 

<!DOCTYPE html>
<html>
<body>

<img src="image1.png" width="100" height="100" usemap="#myFlagMap">

<map name="myFlagMap">
  <area id="myArea" 
        shape="circle" 
        coords="50,50,40" 
        alt="Target" 
        href="https://www.java2s.com">
</map>/*from  w ww  . ja  v  a2  s  .  co m*/
<button onclick="myFunction()">Test</button>

<p id="demo"></p>

<script>
function myFunction() {
  document.getElementById("myArea").protocol = "mailto:";
  document.getElementById("demo").innerHTML = "The protocol was changed.";
}
</script>

</body>
</html>



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