GTM Force Reload Tag

GTM_FORCE_reload.js

<script>
/*
This script will force reload of the page based on the harcoded version. 
Create as tag and Use GTM to trigger execution.
*/
  var GTMRELOADER_CURRENT_VERION = '1';
  var GTMRELOADER_KEY_NAME = 'VERSION';

  function canIUseLocalStorage(){
    var test = 'test_ls_test';
    try {
        localStorage.setItem(test, test);
        localStorage.removeItem(test);
        return true;
    } catch(e) {
        return false;
    }
  }

  function setAndReload(){
     localStorage.setItem(GTMRELOADER_KEY_NAME, GTMRELOADER_CURRENT_VERION);
     setTimeout(function() { location.reload(true);}, 2000);
  }

  if(canIUseLocalStorage()){
    console.log("GTM:RELOADER: start");
    //Test if existing key exits  
    try {
        var version_local = localStorage.getItem(GTMRELOADER_KEY_NAME);
        if( version_local != GTMRELOADER_CURRENT_VERION) {
           console.log("GTM:RELOADER: Version mismatch, force-reload");
           setAndReload();         
         } else {
           console.log("GTM:RELOADER: Already in the correct version, nothing to do");
         }  
    } catch(err) {
        console.log("GTM:RELOADER: Version key not set, set and force-reload");  
        setAndReload();  
    }
  } else { 
    console.log("GTM:RELOADER: Local storage function not available, fail save mode: do nothing");  
  }

</script>