javascript lowercase string
var str = "My Big Boy!"
var res = str.toLowerCase(); //res is "my big boy!"javascript lowercase string
var str = "My Big Boy!"
var res = str.toLowerCase(); //res is "my big boy!"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)tolowercase javascript
var str = "Hello World!";
var res = str.toLowerCase();js tolowercase
str.toLowerCase()Copyright © 2021 Codeinu
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