Create a key that saves the previous value; and I want to add the old value to the new value (all entered by the same input);
for example: I have 5 and when I enter 2 I want to obtain 7;
But it only replaces the value, for example: if I enter 5 as the 1st value, it saves it; When entering 2 it replaces 5 and the sum returns 4 as the final result and if I enter 3 a 6.
I hope the question is understandable thank you very much in advance for the help
function assert() {
let valorDeInput = document.getElementById('btn2').value;
localStorage.setItem('name_user', valorDeInput);
let user = localStorage.getItem('name_user');
let suma = parseFloat(' valorDeInput') + parseFloat (user);
document.getElementById('cuadrado').innerHTML = suma;
}
I want to get the sum of the 2 values and not have it replaced