使用样式在工具栏中显示后退按钮

<div class="toolbar">
  <!-- 在这里添加后退按钮 -->
</div>

.toolbar {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  height: 50px;
  background-color: #f2f2f2;
  padding: 0 10px;
}

<div class="toolbar">
  <button class="back-button">
    <i class="fas fa-arrow-left"></i> 后退
  </button>
</div>

.back-button {
  background-color: #007bff;
  color: #fff;
  border: none;
  padding: 5px 10px;
  border-radius: 5px;
  cursor: pointer;
}