➕ isHalfWidth

README.md

@@ -28,7 +28,7 @@ Validate is a standard Deno module for validating string.
 * [x] isFloat
 * [x] isFQDN
 * [x] isFullWidth
-* [ ] isHalfWidth
+* [x] isHalfWidth
 * [ ] isHash
 * [ ] isHexColor
 * [ ] isHexadecimal

src/libs/isHalfWidth.ts

@@ -0,0 +1,9 @@
+// @ts-ignore allowing typedoc to build
+import assertString from '../utils/assertString.ts';
+
+export const halfWidth = /[\u0020-\u007E\uFF61-\uFF9F\uFFA0-\uFFDC\uFFE8-\uFFEE0-9a-zA-Z]/;
+
+export const isHalfWidth = (str: string) => {
+  assertString(str);
+  return halfWidth.test(str);
+};

src/mod.ts

@@ -42,3 +42,5 @@ export * from './libs/isFloat.ts';
 export * from './libs/isFQDN.ts';
 // @ts-ignore allowing typedoc to build
 export * from './libs/isFullWidth.ts';
+// @ts-ignore allowing typedoc to build
+export * from './libs/isHalfWidth.ts';