javascript islowercase code example
Example 1: javascript lowercase string
var str = "My Big Boy!"
var res = str.toLowerCase();
Example 2: javascript check if all capital letter
function isUpper(str) {
return !/[a-z]/.test(str) && /[A-Z]/.test(str);
}
isUpper("FOO");
isUpper("bar");
isUpper("123");
isUpper("123a");
isUpper("123A");
isUpper("A123");
isUpper("");
Example 3: how to convert whole strig in lowercase in js
var str = "Hello World!";
var res = str.toLowerCase();
Example 4: check if letter is uppercase javascript
const isUpperCase = (string) => /^[A-Z]*$/.test(string)
Example 5: js tolowercase
str.toLowerCase()