JavaScript Agenda

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JavaScript Agenda

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#1 by (0 votes)

1

I have problems to do what they are asking me, in terms of creating an agenda, they ask me to create a page where there is a send button that will make the first data that it receives become the username and password to access to the next part of my agenda, what happens that as soon as I try to do this I only manage to do something that is constantly being replaced, I do not know how to create this action so that the first time the user is saved and password, the boxes are cleaned and then I have to put the data of my first entry to access otherwise I have to leave a user message or invalid keys. They also ask me for other validations, but the most important thing I want to learn is the registry that is not replaced with the new values that I put, as a last thing you should also redirect to the page of the form when the start data is correct. (This function has not been explained to me by my teacher so I ask for help, sorry if it is very foolish of me but I have no idea how to do it).

Here I will leave some code that was thinking how to do it.

I will also leave some images of the statement that they provided me just in case I have not explained myself well. . < a href="https://i.stack.imgur.com/Qy4Ll.png">

Java Script

function enviar()
{

    let nombre=document.getElementById("nombre").value;
    let clave=document.getElementById("clave").value;


    if(nombre.length < 1 || clave.length < 1)
        alert("Complete correctamente los campos");
    else{

        alert("Usuario Registrado");
        document.getElementById("nombre").value = "";
        document.getElementById("nombre").value = "";
        var rnombre=nombre;
        var rclave=clave;
    }
    if(nombre!=rnombre || clave!=rclave){
        alert("nombre de usuario o clave incorrecta");
    }
}

javascript html css web

asked by JaimepaOK 16.12.2018 в 19:31

source

1 answer

Attempt to invoke virtual method 'void android.widget.TextView.setText (java.lang.CharSequence)' on a null object reference Ajax in express JavaScript server

score 0 · Answer 1

With 2 buttons (send and register):

Out of the functions in the JavaScript file:

var nombre_usuario = "";
var clave_contrasenya = "";
var nombre=document.getElementById("nombre").value;
var clave=document.getElementById("clave").value;

Record function:

function registro(){
 if(nombre.length < 1 || clave.length < 1){
    alert("Complete correctamente los campos");
  }else{
    alert("Usuario Registrado");
    nombre_usuario = nombre;
    clave_contrasenya = clave;
    nombre="";
    clave="";
  }
}

Send function:

    function enviar(){

    if(nombre!=nombre_usuario || clave!=clave_contrasenya){
        alert("nombre de usuario o clave incorrecta");
    }else{
        window.location="pagina.html"; //redirecciona la página actual a hacia la página que le indiques
    }  
}

With coockies:

Send function:

function enviar(){
  var nombre=document.getElementById("nombre").value;
  var clave=document.getElementById("clave").value;
  if((getCookie("nombre")==null || getCookie("nombre")=="") || (getCookie("contrasenya")==null||getCookie("contrasenya")=="")){
    if(getCookie("nombre").length < 1 || getCookie("contrasenya").length < 1{
       alert("Complete correctamente los campos");
    }else{
       alert("Usuario Registrado");
       document.cookie = "nombre = "+nombre;
       document.cookie = "contrasenya = "+clave;
       nombre="";
       clave="";
    }
  }else if(nombre!=getCookie("nombre") || clave!=getCookie("contrasenya")){
          alert("nombre de usuario o clave incorrecta");
        }else{
            window.location="pagina.html"; //redirecciona la página actual a hacia la página que le indiques
        }

    }
}

If you want to delete the cookie you must add:

document.cookie = "nombre=; expires=Thu, 01 Jan 1970 00:00:00 UTC";