vue实现动态添加数据滚动条自动滚动到底部的示

watch: {
  chatlog() {
    var container = this.$el.querySelector("#chatContainer");
    console.log(container);
    container.scrollTop = container.scrollHeight;
   }
 }

 watch: {
  chatlog() {
   console.log("chatlog change");
   this.$nextTick(() => {
    var container = this.$el.querySelector("#chatContainer");
    console.log(container);
    container.scrollTop = container.scrollHeight;
   })
   // document.getElementById('chatContainer').scrollTop = document.getElementById('chatContainer').scrollHeight+150;

  }
 }