1.在html文件中

  <div class="sldiv" style="overflow: hidden; word-break: normal; word-wrap: break-word; max-width: 179px">
        1111111111111111111111111111111111111111111111111111111111
   </div>

1.1封装成了一个函数,是控制字数多少来添加省略号

   function wordlimit(cname,wordlength){
        var cname=document.getElementsByClassName(cname);
        console.log(cname);
        console.log(cname[0]);
        for(var i=0;i<cname.length;i++){
            console.log(cname.length);
        var nowhtml=cname[i].innerHTML;
        var nowlength=cname[i].innerHTML.length;
        if(nowlength>wordlength){
        cname[i].innerHTML=nowhtml.substr(0,wordlength)+'......';
        }
        }
        }
        wordlimit('sldiv',20)

2.在html" title=vue>vue中

  <p class="detail" v-html="item.content"></p>

  mounted() {
    this.$nextTick(function(){
      this.wordlimit('detail', 119)
    })
  },

2.1要加个定时器,不加定时器获取不到dom元素

 methods: {
    wordlimit(cname, wordlength) {
        setTimeout(() => {
      let cnamec = document.getElementsByClassName(cname)
      for (let i = 0; i < cnamec.length; i++) {
        var nowhtml=cnamec[i].innerHTML;
        var nowlength=cnamec[i].innerHTML.length;
        if(nowlength>wordlength){
        cnamec[i].innerHTML=nowhtml.substr(0,wordlength)+'......';
        }
      }
      }, 200)
    },
  }