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Check if a string is upper case

Written byPhuoc Nguyen

Created

19 Apr, 2020

Last updated

13 Oct, 2021

Category

Validator

JavaScript version

isUpperCase.js

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

TypeScript version

isUpperCase.ts

const isUpperCase = (str: string): boolean => str === str.toUpperCase();

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Phước Nguyễn

Check if a string is upper case

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