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I was looking for more knowledge about cookies on youtube and only found video in English, but what does this have more? I do not speak English! However, I understood that cookies work this way → are stored, read and sometimes deleted.

Where do I want to go? Well ... I want to put cookies in 2 scripts, but so far I can not. I had asked here in the forum how to put cookies in this script ↓↓↓ 

<a id="id1" href="https://br.answers.yahoo.com" onclick="myFunction(event)" target="_blank">Clique Aqui</a> <br/><br/>

<script language="javascript">
    function myFunction(s) {
        var id = s.target.id;

        document.getElementById(id).style.color = "green";
        setTimeout(function(){
            document.getElementById(id).style.color = "blue";
        }, 10000);
    }
</script>

So I got this answer: ↓

If you want it to continue indefinitely until you delete it, you can do this with html5, or if you want to forget the data when closing the browser as well. 

INDEFINIDAMENTE: // Armazenar

localStorage.setItem("lastname", "Smith");
// Receber

var lastname = localStorage.getItem("lastname");
// Remover

localStorage.removeItem("lastname");
TEMPORARIAMENTE // Armazenar

sessionStorage.setItem("lastname", "Smith");
// Receber

var lastname = sessionStorage.getItem("lastname");
// Remover

sessionStorage.removeItem("lastname");

But I did not understand how to insert, can you help me?

    
asked by anonymous 19.05.2016 / 14:07

2 answers

1

JavaScript Cookie

There is a very detailed way to work with Cookies through JavaScript, easily and well documented.

Follow: link

Import:

<script src="https://cdnjs.cloudflare.com/ajax/libs/js-cookie/2.1.1/js.cookie.min.js"></script>

Gets and Set Cookies:

Create a cookie that expires 7 days from now, valid throughout the site: 

Cookies.set('name', 'value', { expires: 7 });

Read Cookie: 

Cookies.get('name');

Read all visible cookies 

Cookies.get();

Delete cookie: 

Cookies.remove('name');

In the github documentation there are more detailed examples.

    
19.05.2016 / 15:00
2

I did not quite understand what values to store in cookies. But here are some functions that give way to working with client side cookies:

Enable cookie: 

// entra como argumentos: o nome que quer dar ao cookie, respetivo valor, e número de dias para ficar ativo
function set_cookie(nome, valor, dias) {

    //data em que o cookie vai expirar, ficar desativo
    expires = new Date(new Date().getTime() + parseInt(dias) * 1000 * 60 * 60 * 24);

    // set cookie
    document.cookie = name+'='+value+'; expires=' +expires+ '; path=/';

}

Verify that it exists: 

// aqui entra o nome do cookie que quer e respetivo valor, vai-lhe ser returnado true (existe, já está ativo) ou false (não existe)
function cookie_exists(nome,valor) {

    var cookie = document.cookie; // Aqui vamos buscar todos os cookies do nosso site

    var cookieNameValue = cookie.split(";"); // vamos dividir a string por ';', para obtermos um array (vetor) com todos os nome/valores dos cookies
    var countCookies = cookieNameValue.length;
    var cookieWeWant = nome+"="+valor; // este é o cookie que queremos

    for(var i=0; i<countCookies; i++) {
        if(cookieWeWant == cookieNameValue[i].trim()) {
            return true;
        }
    }

    return false;
}

Delete a cookie: 

// aqui entra o nome do cookie que quer apagar
function delete_cookie(nome) {
    //para apagar um cookie basta ativar um cookie para uma data passada
    expires = new Date(new Date().getTime() - 1);
    document.cookie = nome+'=123; expires=' +expires+ '; path=/';
}
    
19.05.2016 / 14:13
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