<style>
      /* 去掉右侧上下箭头 */
      .mo-input--number input::-webkit-outer-spin-button,
      .mo-input--number input::-webkit-inner-spin-button {
      
      
        -webkit-appearance: none;
      }
      .mo-input--number input[type="number"] {
      
      
        -moz-appearance: textfield;
      }
    </style>

    <div class="mo-input--number">
      <input type="number" />
    </div>