如何将焦点带到jquery的窗口？

$("#myWindow").focus();

$("#myInput").focus();

$(window).on("load", function() {
  $("#myInput").focus();
});

$(document).ready(function() {
  var observer = new MutationObserver(function(mutations) {
    mutations.forEach(function(mutation) {
      if (mutation.type === "childList") {
        $("#myInput").focus();
        observer.disconnect();
      }
    });
  });

  observer.observe(document.body, { childList: true, subtree: true });
});