[javascript] Auto refresh page every 30 seconds

I have a JSP page which has to display the status of various jobs that are running. Some of these jobs take time, so it takes a while for their status to change from processing to complete.

Is it a good idea to have a javascript function that would refresh the page every 30 seconds or so? Are there any ramifications for having a script that is constantly refreshing a page?

The other option is to have a refresh button which on click would refresh the page.

Use setInterval instead of setTimeout. Though in this case either will be fine but setTimeout inherently triggers only once setInterval continues indefinitely.

<script language="javascript">
setInterval(function(){
   window.location.reload(1);
}, 30000);
</script>

Just a simple line of code in the head section can refresh the page

<meta http-equiv="refresh" content="30">

although its not a javascript function, its the simplest way to accomplish the above task hopefully.

If you want refresh the page you could use like this, but refreshing the page is usually not the best method, it better to try just update the content that you need to be updated.

javascript:

<script language="javascript">
setTimeout(function(){
   window.location.reload(1);
}, 30000);
</script>