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

title, type, tags, cover, dateModified

title	type	tags	cover	dateModified
String is uppercase	snippet	string	flower-portrait-7	2020-09-15T16:28:04+03:00

Checks if a string is upper case.

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

const isUpperCase = str => str === str.toUpperCase();

isUpperCase('ABC'); // true
isUpperCase('A3@$'); // true
isUpperCase('aB4'); // false