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(""); //falsecheck if letter is uppercase javascript
const isUpperCase = (string) => /^[A-Z]*$/.test(string)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
}Copyright © 2021 Codeinu
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