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

title, tags, cover, firstSeen, lastUpdated

title	tags	cover	firstSeen	lastUpdated
String is lowercase	string	flower-portrait-7	2018-01-06T11:16:05+02:00	2020-10-20T11:21:07+03:00

Checks if a string is lower case.

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

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

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