fix(Stepper): incorrect value when format minus value (#6238)

src/utils/format/number.ts

@@ -1,3 +1,27 @@
 export function range(num: number, min: number, max: number): number {
   return Math.min(Math.max(num, min), max);
 }
+
+function trimExtraChar(value: string, char: string, regExp: RegExp) {
+  const index = value.indexOf(char);
+
+  if (index > -1) {
+    return value.slice(0, index + 1) + value.slice(index).replace(regExp, '');
+  }
+
+  return value;
+}
+
+export function formatNumber(value: string, allowDot?: boolean) {
+  if (allowDot) {
+    value = trimExtraChar(value, '.', /\./g);
+  } else {
+    value = value.split('.')[0];
+  }
+
+  value = trimExtraChar(value, '-', /-/g);
+
+  const regExp = allowDot ? /[^-0-9.]/g : /[^-0-9]/g;
+
+  return value.replace(regExp, '');
+}