I have this basic code and it works well when I write the name.
var user = prompt("Cual es tu nombre").toLowerCase();
if (user) {
console.log("Hola " + user);
} else if (user === null) {
console.log("Adios " + user);
}The problem comes when I give it to cancel. I miss this error in the console:
Uncaught TypeError: Can not read property 'toLowerCase' of null
Is there any way I can print the content if cancel is given?
This no longer generates an error
var user = prompt("Cual es tu nombre","");
if(user != null)
user= user.toLowerCase();
if (user) {
console.log("Hola " + user);
} else if (user === null) {
console.log("Adios " + user);
} Hello, the problem is that when you give cancel the follow the .toLowerCase() a solution that I propose is to validate if the name variable has something defined and only execute the method if it has something assigned.
var name = prompt("Cual es tu nombre")
var user = name ? name.toLowerCase() : null ;
if (user) {
console.log("Hola " + user);
} else if (user === null) {
console.log("Adios " + user);
}