Answers for "how to check if a character is capital javascript"

6

javascript check if all capital letter

function isUpper(str) {
    return !/[a-z]/.test(str) && /[A-Z]/.test(str);
}

isUpper("FOO"); //true
isUpper("bar"); //false
isUpper("123"); //false
isUpper("123a"); //false
isUpper("123A"); //true
isUpper("A123"); //true
isUpper(""); //false
Posted by: Guest on October-30-2020
3

check if letter is uppercase javascript

const isUpperCase = (string) => /^[A-Z]*$/.test(string)
Posted by: Guest on November-28-2020

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