template

	<div class="div-flex">
			<div class="left">
				{{ info.left }}
			</div>
			<div class="right">
				{{ info.right }}
			</div>
		</div>

style

	.div-flex {
		display: flex;
		flex-direction: row;
		justify-content: space-between;
		align-items: center;
	}
   .left{
        flex: 1; //重点
		overflow: hidden;
		text-overflow: ellipsis;
		white-space: nowrap;
   }
   .right{
        padding-left: 40px; //距离左侧的宽度，更美观
  }

总结

重点在于flex，flex：1会自动放大缩小

展示