isUpperCase

snippets/isLowerCase.md

@@ -0,0 +1,17 @@
+### isLowerCase
+
+Checks if the provided argument contains anything else than the lowerCase alphabets. If the second argument is provided to be true than numbers and other symbols are considered lowercase too.
+
+``` js
+const isLowerCase = (val,symbol = false) => {
+  if (symbol) return val === val.toLowerCase()
+  else return !(/[^a-z]/g.test(val))
+}
+```
+```js
+isUpperCase('abc'); //true
+isUpperCase('abc123@$'); //false
+isUpperCase('abc123@$',true); //true
+isUpperCase('abc123@$ABCD',true); //false
+isUpperCase('abc123@$ABCD'); //false
+```