hide a button tools

[Lamia ADJIR]

Hello,
I have a problem with which I want to hide the buttons tools on the dashboard page using javascript,
When i execute this sript                                                                                          

var t = window.document.getElementById("dashboard-tools-dropdown");
t.style.display="none";  

on the browser console its walking but when i put it in live filed or the ad banner it displays this error

 Dashboard.jspa:306 Uncaught TypeError: Cannot read property 'style' of null at 

[Fabio Racobaldo _Catworkx_]

Hi @Lamia ADJIR ,

probably your javascript is executed before that element is loaded.

Please try to add the jira event on your javascript in order to be sure that it is executed after that page is fully loaded :

require([ 'jira/util/events', 
          'jira/util/events/types', 
          'jira/util/events/reasons', 
           ], function(Events, EventTypes, EventReasons) { 

      "use strict"; 

      Events.bind(JIRA.Events.NEW_CONTENT_ADDED , function(e, jiraContext, reason) {
           
          switch (reason) { 
            case EventReasons.pageLoad: 
                 YOUR_JS_CODE_HERE
            break; 
          } 
      }); 
});

Hope this helps,

Fabio