jQuery:在页面卸载时自动中止AjaxRequests？

var ajaxRequest = null;

function sendAjaxRequest() {
  if (ajaxRequest !== null) {
    ajaxRequest.abort();
  }

  ajaxRequest = $.ajax({
    url: "your-url-here",
    type: "GET",
    dataType: "json",
    beforeSend: function() {
      // Set the flag to true to indicate that a request is in progress
      ajaxRequest = true;
    },
    success: function(data) {
      // Handle the success case
    },
    error: function(xhr, textStatus, errorThrown) {
      // Handle the error case
    },
    complete: function() {
      // Reset the flag to false to indicate that the request is complete
      ajaxRequest = false;
    }
  });
}

$(window).on("beforeunload", function() {
  if (ajaxRequest !== null) {
    ajaxRequest.abort();
  }
});