Answers for "how to tell if a letter is uppercase in 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
0

check to see if work is uppercase javascript

var word = 'apple' //Expected: false

//Use word[0] to grap the first letter
if (word[0] == word[0].toUpperCase()) {
  //Word is uppercase
} else {
  //Word is not uppercase
}
Posted by: Guest on July-15-2021

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