How to change href of <a> tag on button click through javascript

StackOverflow https://stackoverflow.com/questions/4365246

  •  09-10-2019
  •  | 
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Pergunta

How to change the href attribute value of an <a/> tag through Javascript on button click ?

<script type="text/javascript">
  function f1()
  {
    document.getElementById("abc").href="xyz.php"; 
  }
</script>

<a href="" id="abc">jhg</a>
<a href="" id="" onclick="f1()">jhhghj</a>
Foi útil?

Solução

Without having a href, the click will reload the current page, so you need something like this:

<a href="#" onclick="f1()">jhhghj</a>

Or prevent the scroll like this:

<a href="#" onclick="f1(); return false;">jhhghj</a>

Or return false in your f1 function and:

<a href="#" onclick="return f1();">jhhghj</a>

....or, the unobtrusive way:

<a href="#" id="abc">jhg</a>
<a href="#" id="myLink">jhhghj</a>

<script type="text/javascript">
  document.getElementById("myLink").onclick = function() {
    document.getElementById("abc").href="xyz.php"; 
    return false;
  };
</script>

Outras dicas

Exactly what Nick Carver did there but I think it would be best if used the DOM setAttribute method.

<script type="text/javascript">
   document.getElementById("myLink").onclick = function() {
   var link = document.getElementById("abc");
   link.setAttribute("href", "xyz.php");
   return false;
   }
</script>

It's one extra line of code but find it better structure-wise.

remove href attribute:

<a id="" onclick="f1()">jhhghj</a>

if link styles are important then:

<a href="javascript:void(f1())">jhhghj</a>

To have a link dynamically change on clicking it:

<input type="text" id="emailOfBookCustomer" style="direction:RTL;"></input>
        <a 
         onclick="this.href='<%= request.getContextPath() %>/Jahanpay/forwardTo.jsp?handle=<%= handle %>&Email=' + document.getElementById('emailOfBookCustomer').value;" href=''>
    A dynamic link 
            </a>

<a href="#" id="a" onclick="ChangeHref()">1.Change 2.Go</a>

<script>
function ChangeHref(){
document.getElementById("a").setAttribute("onclick", "location.href='http://religiasatanista.ro'");
}
</script>

Here's my take on it. I needed to create a URL by collecting the value from a text box , when the user presses a Submit button.

<html>
<body>

Hi everyone

<p id="result"></p>

<textarea cols="40" id="SearchText" rows="2"></textarea>

<button onclick="myFunction()" type="button">Submit!</button>

<script>
function myFunction() {
    var result = document.getElementById("SearchText").value;
	document.getElementById("result").innerHTML = result;
	document.getElementById("abc").href="http://arindam31.pythonanywhere.com/hello/" + result;
}		
</script>


<a href="#" id="abc">abc</a>

</body>
<html>

I know its bit old post. Still, it might help some one.

Instead of tag,if possible you can this as well.

 <script type="text/javascript">
        function IsItWorking() {
          // Do your stuff here ...
            alert("YES, It Works...!!!");
        }
    </script>   

    `<asp:HyperLinkID="Link1"NavigateUrl="javascript:IsItWorking();"`            `runat="server">IsItWorking?</asp:HyperLink>`

Any comments on this?

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