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Thread: [RESOLVED] Javascript Spinner visibility question

  1. #1

    Thread Starter
    Join Date
    Oct 2021

    Resolved [RESOLVED] Javascript Spinner visibility question

    I am using this spinner code below :

    		<div id="spinner" style="visibility:hidden;" class="text-center">
    		  <div class="spinner-border" role="status"></div>
    And set the javascript visibility below:

    function loadXMLDoc() {
      const xhttp = new XMLHttpRequest();
      xhttp.onreadystatechange = function() {
        if (xhttp.readyState !== 4 || xhttp.status !== 200 || !xhttp.responseText) {
          document.getElementById('spinner').style.visibility = "visible";
        document.getElementById('spinner').style.visibility = "hidden";
        document.getElementById('p1').innerHTML = xhttp.responseText;
      document.getElementById('spinner').style.visibility = "visible";"POST", "manage.php", true);
    The code works but I noticed that even after successful retrieval of the responseText, the spinner visibility will show from time to time.
    Why is this happening ? Is it perhaps of the xhttp.onreadystatechange ?

    Update: I confirm that it is because of the xhttp.onreadystatechange. But which one should be used ? the onload or onreadystatechange ?

    FOLLOW UP QUESTION: Can I do xhttp.abort(); after the const xhttp = new XMLHttpRequest(); or where should I properly place the abort method. My reason is that if the processing takes time, the user can click the button again to retry the process.
    Last edited by UserBee; Nov 5th, 2021 at 08:17 PM.

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