对话的 ... 加载动画，直接用 CSS 就可以实现，样式可以自己改，逻辑大差不差

 <div class="loading-text"><span class="dot1"></span><span class="dot2"></span><span class="dot3"></span></div>

          .loading-text {> span {display: inline-block;width: 10px;height: 10px;background-color: $color;border-radius: 50%;& + span {margin-left: 5px;}}.dot1 {animation: dot 1s infinite;}.dot2 {animation: dot 1s infinite 0.2s;}.dot3 {animation: dot 1s infinite 0.4s;}.dot4 {animation: dot 1s infinite 0.6s;}@keyframes dot {0% {opacity: 0;}50% {opacity: 1;}100% {opacity: 0;}}}