Cadena en minúscula de JavaScript
var str = "My Big Boy!"
var res = str.toLowerCase(); //res is "my big boy!"
Grepper
var str = "My Big Boy!"
var res = str.toLowerCase(); //res is "my big boy!"var str = "Hello World!";
var res = str.toLowerCase();string.toLowerCase();var str = "ExaMple";
var res = str.toLowerCase();
output res -> "example"var string = "TO loWer CASE";
console.log(string.toLowerCase()); // to lower casevar string = "A string";
var upperCase = string.toUpperCase();
console.log(upperCase); // -> A STRING
var lowerCase = string.toLowerCase();
console.log(lowerCase); // -> a string