<table>           <tr>               <td>班級(jí)</td>              <td><input type="text" class="data"></td>           </tr>           <tr>               <td>姓名</td>               <td><input type="text" class="data"></td>           </tr>       </table>綁定的函數(shù)    function  fix(event){        console.log("haha");             }    document.addEventListener("blur",fix,true);為何當(dāng)焦點(diǎn)從某個(gè)input中移開的時(shí)候，沒有觸發(fā)blur事件,console.log("haha"); 沒有執(zhí)行？