重构

src/lib/number.ts

@@ -6,7 +6,7 @@ export const toFiniteNumberOrNull = (value: unknown): number | null =>
 
 export const parseNumberOrNull = (
   value: unknown,
-  options?: { sanitize?: boolean }
+  options?: { sanitize?: boolean; precision?: number }
 ): number | null => {
   if (value === '' || value == null) return null
 
@@ -16,5 +16,15 @@ export const parseNumberOrNull = (
       : value
 
   const numericValue = Number(normalized)
-  return Number.isFinite(numericValue) ? numericValue : null
+  if (!Number.isFinite(numericValue)) return null
+
+  const precision = options?.precision
+  if (typeof precision !== 'number' || !Number.isInteger(precision) || precision < 0) {
+    return numericValue
+  }
+
+  const factor = 10 ** precision
+  if (!Number.isFinite(factor) || factor <= 0) return numericValue
+  if (numericValue >= 0) return Math.round((numericValue + Number.EPSILON) * factor) / factor
+  return -Math.round((-numericValue + Number.EPSILON) * factor) / factor
 }