var str =  这里绑定富文本框的内容 ;
      str = this.delHtmlTag(str);

      var test = str
      test = test.replace(/ /ig, "");

      if( test.trim() == null ||  test.trim() == '' ||  test.trim() == undefined ){
        this.$message.error("不能输入全空格")
        return;
      }


delHtmlTag(str){
    　　return str.replace(/<[^>]+>/g,"");
    },