修改下面的代码var checkedIndexes = 1 2 4; 我想改成从30开始勾选20个框var checkboxes = documentquerySelectorAllinputtype=checkbox;var checkedIndexes = 1 2 4; 需要勾选的索引值for var i = 0; i checkboxeslength; i++ checkboxesi

var checkboxes = document.querySelectorAll('input[type="checkbox"]'); var checkedIndexes = Array.from({length: 20}, (_, index) => index + 30); // 从30开始，勾选20个框 for (var i = 0; i < checkboxes.length; i++) { checkboxes[i].checked = checkedIndexes.indexOf(i) !== -1 ? true : checkboxes[i].checked; }