Utilisez JavaScript pour implémenter les fonctions de commentaires et de likes

var list = document.getElementById('list');
      var boxs = document.getElementsByClassName('box');
      //删除节点函数
      function removeNode(node){
        node.parentNode.removeChild(node);
      }
      //事件代理
      for(var i=0 ;i<boxs.length;i++){
        boxs[i].onclick = function(e){
          e = e||window.event;
          var el = e.srcElement || e.target;
          switch (el.className) {
            case &#39;close&#39;:removeNode(el.parentNode);break;
          }
        }
      }

//点赞分享
      function praiseBox(box,el){//box为所触发元素el的最外层父容器
        var praiseElement = box.getElementsByClassName('praise-total')[0];
        var oldTotal = parseInt(praiseElement.getAttribute('total'));
        var txt = el.innerHTML;
        var newTotal = 0;
        if(txt == '赞'){
          newTotal = oldTotal + 1;
          praiseElement.innerHTML = (newTotal == 1) ? '我觉得很赞' : '我和' + oldTotal +'个人觉得很赞';
          el.innerHTML = '取消赞';
        }else{
          newTotal = oldTotal - 1;
          praiseElement.innerHTML = (newTotal == 0) ? '' : newTotal + '个人觉得很赞';
          el.innerHTML = '赞';
        }
        praiseElement.setAttribute('total',newTotal);
        praiseElement.style.display = (newTotal == 0) ? 'none': 'block';
      }
      //事件代理
      for(var i=0 ;i<boxs.length;i++){
        boxs[i].onclick = function(e){
          e = e||window.event;
          var el = e.srcElement || e.target;
          switch (el.className) {
            case &#39;close&#39;:removeNode(el.parentNode);break;
            case &#39;praise&#39;:praiseBox(el.parentNode.parentNode.parentNode,el);
          }
        }
      }

//输入框
        var textarea = boxs[i].getElementsByTagName('textarea')[0];
        textarea.onfocus = function(){
          this.parentNode.className = 'text-box text-box-on';
          this.value = (this.value == '评论...') ? '':this.value;
        }
        textarea.onblur = function(){
          if(this.value == ''){
            this.parentNode.className = 'text-box';
            this.value = '评论...';
          }
        }

textarea.onblur = function(){
          var me = this;//因为有定时器所以先将this存放于变量中
          timer = setTimeout(function(){
            if(me.value == ''){
              me.parentNode.className = 'text-box';
              me.value = '评论...';
            }
          },500);
        }
        textarea.onkeyup = function(){
          var len = this.value.length;
          var p = this.parentNode;
          var btn = p.children[1];
          var word = p.children[2];
          if(len == 0 || len > 140){
            btn.className = 'btn btn-off';
          }else{
            btn.className = 'btn';
          }
          word.innerHTML = len + '/140';
        }

//发表评论
      function replayBox(box){
        var textarea = box.getElementsByTagName('textarea')[0];
        var list = box.getElementsByClassName('comment-list')[0];
        var p = document.createElement('p');
        p.className = 'comment-box clearfix';
        p.setAttribute('user','self');
        var html = &#39; <img src="images/my.jpg" class="myhead" alt="" />&#39;+
            &#39;<p class="comment-content">&#39;+
            &#39;<p class="comment-text"><span class="user">我：</span>&#39;+textarea.value+&#39;</p>&#39;+
            &#39;<p class="comment-time">&#39;+
            getTime()+
            &#39;<a href="javascript:;" rel="external nofollow" rel="external nofollow" class="comment-praise" total="0" my="0" style="">赞</a>&#39;+
            &#39;<a href="javascript:;" rel="external nofollow" rel="external nofollow" class="comment-operate">删除</a>&#39;+
            &#39;</p>&#39;+
            &#39;</p>&#39;;
        p.innerHTML = html;
        list.appendChild(p);
        textarea.value = &#39;&#39;;
        textarea.onblur();
        function getTime(){
          var t = new Date();
          var y = t.getFullYear();
          var m = t.getMonth() + 1;//月份是从0开始
          var d = t.getDay();
          var h = t.getHours();
          var mi = t.getMinutes();
          m = m>10 ? m: &#39;0&#39; + m;
          d = d>10 ? d: &#39;0&#39; + d;
          h = h>10 ? h: &#39;0&#39; + h;
          mi = mi>10 ?mi: &#39;0&#39; +mi;
          return y + &#39;-&#39; + m + &#39;-&#39; + d + &#39; &#39; + h + &#39;:&#39; + mi;
        }
      }