>>/23628/

loosely tested at best. drop into js console when in thread moderation mode. script will attempt to auto lock the thread after post o751.


function lockThread() {
   var lock = document.querySelector("#checkboxLock");
   lock.checked = true;
   saveThreadSettings();
}

var intval = setInterval(() => { 
   if (posts.length > 751) {
      lockThread();
      clearInterval(intval);
   }
}, 1000);