fix nan issue for reverse fill

Author: Dipak Sarkar

src/number-format.js

@@ -38,7 +38,7 @@ export default function NumberFormat(config = options) {
   function toFixed(numbers, precision) {
     // eslint-disable-next-line no-restricted-properties
     var exp = Math.pow(10, precision);
-    var float = parseFloat(numbers) / exp;
+    var float = parseFloat(numbers) / exp || 0;
     return float.toFixed(fixed(precision));
   }
 

tests/unit/number-format.reverse-fill.spec.js

@@ -3,13 +3,21 @@ import NumberFormat from "../../src/number-format";
 describe("when enabled reverse fill", () => {
   const numberFormat = new NumberFormat({
     reverseFill: true,
+    prefix: "$",
   });
   it("should return as follows", () => {
-    expect(numberFormat.format("sdfgasd55468.546")).toEqual("554,685.46");
-    expect(numberFormat.format("sdfgasd55468.546")).toEqual("554,685.46");
-    expect(numberFormat.format("sdfgasd55468.546-")).toEqual("-554,685.46");
-    expect(numberFormat.format("-1234.6512")).toEqual("-123,465.12");
-    expect(numberFormat.format("0")).toEqual("0.00");
+    expect(numberFormat.format("sdfgasd55468.546")).toEqual("$554,685.46");
+    expect(numberFormat.format("sdfgasd55468.546")).toEqual("$554,685.46");
+    expect(numberFormat.format("sdfgasd55468.546-")).toEqual("-$554,685.46");
+    expect(numberFormat.format("-1234.6512")).toEqual("-$123,465.12");
+    expect(numberFormat.format("0")).toEqual("$0.00");
+  });
+  it("should return as follows", () => {
+    expect(numberFormat.format("sdfgasd55468.546")).toEqual("$554,685.46");
+    expect(numberFormat.format("sdfgasd55468.546")).toEqual("$554,685.46");
+    expect(numberFormat.format("sdfgasd55468.546-")).toEqual("-$554,685.46");
+    expect(numberFormat.format("-1234.6512")).toEqual("-$123,465.12");
+    expect(numberFormat.format(0)).toEqual("$0.00");
   });
   it("should return as follows", () => {
     expect(numberFormat.unformat("sdfgasd55468.546")).toEqual("554685.46");