问使用javascript在网页上的下拉列表中单击一个选项

EN

let dropdown = document.getElementById("native_dropdown_selected_size_name");
let dropdown_element = document.getElementById("native_dropdown_selected_size_name_1");
// change the id "native_dropdown_selected_size_name_1" using the number of the item you want to be selected

let evt = document.createEvent("MouseEvents");
evt.initMouseEvent("click", true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
dropdown.dispatchEvent(evt);
dropdown_element.dispatchEvent(evt);