Merge pull request #858 from idrisakmal/master

Created includes function for array to cater older browsers

src/lib/isDecimal.js

@@ -1,5 +1,6 @@
 import merge from './util/merge';
 import assertString from './util/assertString';
+import includes from './util/includes';
 import { decimal } from './alpha';
 
 function decimalRegExp(options) {
@@ -19,7 +20,7 @@ export default function isDecimal(str, options) {
   assertString(str);
   options = merge(options, default_decimal_options);
   if (options.locale in decimal) {
-    return !blacklist.includes(str.replace(/ /g, '')) && decimalRegExp(options).test(str);
+    return !includes(blacklist, str.replace(/ /g, '')) && decimalRegExp(options).test(str);
   }
   throw new Error(`Invalid locale '${options.locale}'`);
 }

src/lib/isISO31661Alpha2.js

@@ -1,4 +1,5 @@
 import assertString from './util/assertString';
+import includes from './util/includes';
 
 // from https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
 const validISO31661Alpha2CountriesCodes = [
@@ -31,5 +32,5 @@ const validISO31661Alpha2CountriesCodes = [
 
 export default function isISO31661Alpha2(str) {
   assertString(str);
-  return validISO31661Alpha2CountriesCodes.includes(str.toUpperCase());
+  return includes(validISO31661Alpha2CountriesCodes, str.toUpperCase());
 }

src/lib/isISO31661Alpha3.js

@@ -1,4 +1,5 @@
 import assertString from './util/assertString';
+import includes from './util/includes';
 
 // from https://en.wikipedia.org/wiki/ISO_3166-1_alpha-3
 const validISO31661Alpha3CountriesCodes = [
@@ -22,5 +23,5 @@ const validISO31661Alpha3CountriesCodes = [
 
 export default function isISO31661Alpha3(str) {
   assertString(str);
-  return validISO31661Alpha3CountriesCodes.includes(str.toUpperCase());
+  return includes(validISO31661Alpha3CountriesCodes, str.toUpperCase());
 }

src/lib/util/includes.js

@@ -0,0 +1,3 @@
+const includes = (arr, val) => arr.some(arrVal => val === arrVal);
+
+export default includes;