jquery自动输入textarea 并触发事件input

$("#textarea_Lottery > textarea").val('22222');
 $("#textarea_Lottery > textarea")[0].dispatchEvent(new Event('input')); 
 var jqTextarea = $('#lt_write_box');
                jqTextarea.click();
                jqTextarea.val('111 222 333 444 555');
                // jqTextarea[0].dispatchEvent(new Event('input'));
                // jqTextarea[0].dispatchEvent(new Event('keyup'));
                // jqTextarea.trigger("keyup");
 
                var jsTextarea = document.getElementById("lt_write_box");
                // jsTextarea.value = "111 222 333";
                jsTextarea.dispatchEvent(new KeyboardEvent("keyup", {
                    bubbles: true,
                    cancelable: true,
                    key: "Enter"
                }));