slider 滑动value数值精度问题

我设了步长为1，滑动过程会出现精度问题，当前亮度是我用setdata设置的，调整亮度是组件showValue的，三张图都没有进行精度处理。

<button>当前屏幕亮度</button> <text>{{screenBrightness*100 + '%'}}</text> <button>调整亮度</button> <slider bindchange="changeLightness" min="0" max="1" step="0.01" show-value value="screenBrightness"/>

data: {   networkType: '',   screenBrightness: 1 }, changeLightness: (e) => {   wx.setScreenBrightness({     value: e.detail.value   ,   success: () => {     self.setData({       screenBrightness: e.detail.value     })   } })},