JavaScript Refresh Function Malfunctioning

Currently, I have a JavaScript code snippet on my website that automatically refreshes an iframe every three seconds.

window.setInterval(function() {
      reloadIFrame()
  }, 3000);

  function reloadIFrame() {
    var frame = document.getElementById("iframe");
    var len = frame.getElementsByTagName("TABLE").length;
    if ( len == 0 ){
      console.log('reloading..');
      document.getElementById('iframe').contentWindow.location.reload();
    }
  }

However, I am facing an issue where the function continues to run even when there is a table present in the iframe. I would appreciate any suggestions or insights on how to prevent the function from executing when a table is detected.

(For context, the iframe I am referring to is most likely local on localhost:8000. I am using Django, and this code is part of a template.)

javascriptjqueryhtmlcss

Answer №1

For those facing a similar issue:

Building on insights from charlietfl's input on the original thread, the reference to contentWindow was a crucial missing piece. The revised code snippet below now functions correctly:

window.setInterval(function() {
      reloadIFrame()
  }, 3000);

  function reloadIFrame() {
    var frame = document.getElementById("iframe");
    var len = frame.contentWindow.document.getElementsByTagName("TABLE").length;
    if ( len == 0 ){
      console.log('reloading..');
      document.getElementById('iframe').contentWindow.location.reload();
    }
  }

All that was needed was to append contentWindow.document after frame.

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