30-seconds-of-code/snippets/isLowerCase.md

isLowerCase

Checks if a string is lower case.

Convert the given string to lower case, using String.toLowerCase() and compare it to the original.

const isLowerCase = str => str === str.toLowerCase();

isLowerCase('abc'); //true
isLowerCase('a3@$'); //false
isLowerCase('Ab4'); //false