Added isDivisibleBy

mod.ts

@@ -27,6 +27,7 @@ import isCurrency from "./src/lib/isCurrency.ts";
 import isDataURI from "./src/lib/isDataURI.ts";
 import isDate from "./src/lib/isDate.ts";
 import isDecimal from "./src/lib/isDecimal.ts";
+import isDivisibleBy from "./src/lib/isDivisibleBy.ts";
 import isEAN from "./src/lib/isEAN.ts";
 import isEmpty from "./src/lib/isEmpty.ts";
 import isEthereumAddress from "./src/lib/isEthereumAddress.ts";
@@ -108,6 +109,7 @@ const validator: ValidatorMap = {
   isDataURI,
   isDate,
   isDecimal,
+  isDivisibleBy,
   isEAN,
   isEmpty,
   isEthereumAddress,

src/lib/isDivisibleBy.ts

@@ -0,0 +1,8 @@
+import toFloat from "./toFloat.ts";
+
+export default function isDivisibleBy(
+  dividend: string,
+  divisor: string,
+): boolean {
+  return toFloat(dividend) % toFloat(divisor) === 0;
+}

src/lib/toFloat.ts

@@ -0,0 +1,6 @@
+import isFloat from "./isFloat.ts";
+
+export default function (str: string): number {
+  if (!isFloat(str, {})) return NaN;
+  return parseFloat(str);
+}

test/test.ts

@@ -2166,6 +2166,49 @@ test({
   ],
 });
 
+test({
+  validator: "isDivisibleBy",
+  args: ["0"],
+  invalid: [
+    "9",
+    "10",
+    "1.12",
+    "0.87",
+    "0.0",
+  ],
+});
+
+test({
+  validator: "isDivisibleBy",
+  args: ["2"],
+  valid: [
+    "10.0",
+    "0",
+    "2.0",
+  ],
+  invalid: [
+    "9",
+    "17",
+    "1.2",
+    "1.1",
+  ],
+});
+
+test({
+  validator: "isDivisibleBy",
+  args: ["11"],
+  valid: [
+    "11",
+    "121",
+    "0",
+    "11.0",
+  ],
+  invalid: [
+    "91",
+    "17",
+    "11.2",
+  ],
+});
 test({
   validator: "isEAN",
   valid: [