30-seconds-of-code/javascript/snippets/is-lower-case.md

title, type, tags, cover, dateModified

title	type	tags	cover	dateModified
String is lowercase	snippet	string	flower-portrait-7	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