antd InputNumber组件保留一位小数

<a-input-number
    :min="0"
    :step="0.1"
    :formatter="(value)=>{
      let reg = /^(-)*(\d+)\.(\d).*$/;
      return `${value}`.replace(/\B(?=(\d{3})+(?!\d))/g, ',').replace(reg,'$1$2.$3');
    }"
    :parser="(value)=>{
      let reg = /^(-)*(\d+)\.(\d).*$/;
      return value.replace(/\s?|(,*)/g, '').replace(reg,'$1$2.$3');
    }"
  />