JS事件委托

 1 // js事件委托
 2 document.getElementById(‘test‘).addEventListener(‘click‘,function(event){
 3     let target = event.target;
 4     if(target.nodeName == ‘LI‘){
 5         console.log(target.innerHTML)
 6     }
 7 })
 8 let six = document.createElement(‘li‘);
 9 six.innerText = ‘6‘
10 document.getElementById(‘test‘).appendChild(six)