Menyimpan data formulir cookies javascript

allCookies = document.cookie;

Dalam kode di atas document.cookie = newCookie; _9 adalah string yang berisi daftar semua cookie yang dipisahkan titik koma (i. e. // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "name=oeschger; SameSite=None; Secure"; document.cookie = "favorite_food=tripe; SameSite=None; Secure"; function showCookies() { const output = document.getElementById('cookies') output.textContent = `> ${document.cookie}` } function clearOutputCookies() { const output = document.getElementById('cookies') output.textContent = '' } 0 pasang). Perhatikan bahwa setiap kunci dan nilai dapat diapit oleh spasi putih (karakter spasi dan tab). sebenarnya, RFC 6265 mengamanatkan satu spasi setelah setiap titik koma, tetapi beberapa agen pengguna mungkin tidak mematuhi ini

document.cookie = newCookie;

Pada kode di atas, // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "name=oeschger; SameSite=None; Secure"; document.cookie = "favorite_food=tripe; SameSite=None; Secure"; function showCookies() { const output = document.getElementById('cookies') output.textContent = `> ${document.cookie}` } function clearOutputCookies() { const output = document.getElementById('cookies') output.textContent = '' } _1 adalah string bentuk // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "name=oeschger; SameSite=None; Secure"; document.cookie = "favorite_food=tripe; SameSite=None; Secure"; function showCookies() { const output = document.getElementById('cookies') output.textContent = `> ${document.cookie}` } function clearOutputCookies() { const output = document.getElementById('cookies') output.textContent = '' } 0, yang menentukan cookie untuk disetel/diperbarui. Perhatikan bahwa Anda hanya dapat mengatur/memperbarui satu cookie pada satu waktu menggunakan metode ini. Pertimbangkan juga itu

• Salah satu dari nilai atribut cookie berikut secara opsional dapat mengikuti key-value pair, masing-masing didahului oleh pemisah titik koma
  • // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "name=oeschger; SameSite=None; Secure"; document.cookie = "favorite_food=tripe; SameSite=None; Secure"; function showCookies() { const output = document.getElementById('cookies') output.textContent = `> ${document.cookie}` } function clearOutputCookies() { const output = document.getElementById('cookies') output.textContent = '' } 3 (mis. g. , '// Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "name=oeschger; SameSite=None; Secure"; document.cookie = "favorite_food=tripe; SameSite=None; Secure"; function showCookies() { const output = document.getElementById('cookies') output.textContent = `> ${document.cookie}` } function clearOutputCookies() { const output = document.getElementById('cookies') output.textContent = '' } 4' atau '// Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "name=oeschger; SameSite=None; Secure"; document.cookie = "favorite_food=tripe; SameSite=None; Secure"; function showCookies() { const output = document.getElementById('cookies') output.textContent = `> ${document.cookie}` } function clearOutputCookies() { const output = document.getElementById('cookies') output.textContent = '' } 5'). Host tempat cookie akan dikirim. Jika tidak ditentukan, ini default ke bagian host dari lokasi dokumen saat ini. Bertentangan dengan spesifikasi sebelumnya, titik awal dalam nama domain diabaikan, tetapi browser dapat menolak untuk menyetel cookie yang berisi titik tersebut. Jika domain ditentukan, subdomain selalu disertakan

    Catatan. Domain harus cocok dengan domain asal JavaScript. Menyetel cookie ke domain asing akan diabaikan secara diam-diam

  • // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "name=oeschger; SameSite=None; Secure"; document.cookie = "favorite_food=tripe; SameSite=None; Secure"; function showCookies() { const output = document.getElementById('cookies') output.textContent = `> ${document.cookie}` } function clearOutputCookies() { const output = document.getElementById('cookies') output.textContent = '' } 6. Tanggal kedaluwarsa cookie. Jika // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "name=oeschger; SameSite=None; Secure"; document.cookie = "favorite_food=tripe; SameSite=None; Secure"; function showCookies() { const output = document.getElementById('cookies') output.textContent = `> ${document.cookie}` } function clearOutputCookies() { const output = document.getElementById('cookies') output.textContent = '' } 7 atau // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "name=oeschger; SameSite=None; Secure"; document.cookie = "favorite_food=tripe; SameSite=None; Secure"; function showCookies() { const output = document.getElementById('cookies') output.textContent = `> ${document.cookie}` } function clearOutputCookies() { const output = document.getElementById('cookies') output.textContent = '' } 8 tidak ditentukan, itu akan kedaluwarsa pada akhir sesi

    Peringatan. Saat privasi pengguna menjadi perhatian, implementasi aplikasi web apa pun harus membatalkan data cookie setelah waktu tunggu tertentu alih-alih mengandalkan browser untuk melakukannya. Banyak browser membiarkan pengguna menentukan bahwa cookie tidak boleh kedaluwarsa, yang belum tentu aman

    Lihat // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "name=oeschger; SameSite=None; Secure"; document.cookie = "favorite_food=tripe; SameSite=None; Secure"; function showCookies() { const output = document.getElementById('cookies') output.textContent = `> ${document.cookie}` } function clearOutputCookies() { const output = document.getElementById('cookies') output.textContent = '' } _9 untuk membantu memformat nilai ini
  • <button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div> _0. Usia maksimum cookie dalam hitungan detik (mis. g. , <button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div> _1 atau 31536000 selama setahun)
  • <button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div> _2. Menunjukkan bahwa cookie harus disimpan menggunakan penyimpanan yang dipartisi. Lihat Cookie Memiliki Status Partisi Independen (CHIPS) untuk detail lebih lanjut
  • <button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div> _3. Menunjukkan jalur yang harus ada di URL yang diminta agar browser mengirimkan header <button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div> 4 (e. g. , '<button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div> 5', '<button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div> 6'). Jika tidak ditentukan, defaultnya adalah jalur saat ini dari lokasi dokumen saat ini
  • <button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div> _7. mencegah browser mengirimkan cookie ini bersama dengan permintaan lintas situs. Nilai yang mungkin adalah <button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div> 8, <button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div> 9 atau // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "test1=Hello; SameSite=None; Secure"; document.cookie = "test2=World; SameSite=None; Secure"; const cookieValue = document.cookie .split('; ') .find((row) => row.startsWith('test2=')) ?.split('=')[1]; function showCookieValue() { const output = document.getElementById('cookie-value') output.textContent = `> ${cookieValue}` } function clearOutputCookieValue() { const output = document.getElementById('cookie-value') output.textContent = '' } 0
    • Nilai <button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div> _8 akan mengirimkan cookie untuk semua permintaan situs yang sama dan permintaan GET navigasi tingkat atas. Ini cukup untuk pelacakan pengguna, tetapi akan mencegah banyak serangan Cross-Site Request Forgery (CSRF). Ini adalah nilai default di browser modern
    • Nilai <button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div> _9 akan mencegah cookie dikirim oleh browser ke situs target dalam semua konteks penjelajahan lintas situs, bahkan saat mengikuti tautan biasa
    • Nilai // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "test1=Hello; SameSite=None; Secure"; document.cookie = "test2=World; SameSite=None; Secure"; const cookieValue = document.cookie .split('; ') .find((row) => row.startsWith('test2=')) ?.split('=')[1]; function showCookieValue() { const output = document.getElementById('cookie-value') output.textContent = `> ${cookieValue}` } function clearOutputCookieValue() { const output = document.getElementById('cookie-value') output.textContent = '' } _0 secara eksplisit menyatakan tidak ada batasan yang akan diterapkan. Cookie akan dikirim dalam semua permintaan—baik lintas situs maupun situs yang sama
  • // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "test1=Hello; SameSite=None; Secure"; document.cookie = "test2=World; SameSite=None; Secure"; const cookieValue = document.cookie .split('; ') .find((row) => row.startsWith('test2=')) ?.split('=')[1]; function showCookieValue() { const output = document.getElementById('cookie-value') output.textContent = `> ${cookieValue}` } function clearOutputCookieValue() { const output = document.getElementById('cookie-value') output.textContent = '' } 4. Menentukan bahwa cookie hanya boleh dikirim melalui protokol yang aman
• String nilai cookie dapat menggunakan // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "test1=Hello; SameSite=None; Secure"; document.cookie = "test2=World; SameSite=None; Secure"; const cookieValue = document.cookie .split('; ') .find((row) => row.startsWith('test2=')) ?.split('=')[1]; function showCookieValue() { const output = document.getElementById('cookie-value') output.textContent = `> ${cookieValue}` } function clearOutputCookieValue() { const output = document.getElementById('cookie-value') output.textContent = '' } _5 untuk memastikan bahwa string tidak berisi koma, titik koma, atau spasi putih (yang tidak diperbolehkan dalam nilai cookie)
• Beberapa implementasi agen pengguna mendukung awalan cookie berikut
  • // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "test1=Hello; SameSite=None; Secure"; document.cookie = "test2=World; SameSite=None; Secure"; const cookieValue = document.cookie .split('; ') .find((row) => row.startsWith('test2=')) ?.split('=')[1]; function showCookieValue() { const output = document.getElementById('cookie-value') output.textContent = `> ${cookieValue}` } function clearOutputCookieValue() { const output = document.getElementById('cookie-value') output.textContent = '' } 6 Memberi sinyal ke browser bahwa browser hanya boleh menyertakan cookie dalam permintaan yang dikirim melalui saluran aman
  • // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "test1=Hello; SameSite=None; Secure"; document.cookie = "test2=World; SameSite=None; Secure"; const cookieValue = document.cookie .split('; ') .find((row) => row.startsWith('test2=')) ?.split('=')[1]; function showCookieValue() { const output = document.getElementById('cookie-value') output.textContent = `> ${cookieValue}` } function clearOutputCookieValue() { const output = document.getElementById('cookie-value') output.textContent = '' } 7 Sinyal ke browser bahwa selain pembatasan untuk hanya menggunakan cookie dari asal yang aman, ruang lingkup cookie terbatas pada atribut jalur yang diturunkan oleh server. Jika server menghilangkan atribut jalur, "direktori" dari URI permintaan digunakan. Ini juga menandakan bahwa atribut domain tidak boleh ada, yang mencegah cookie dikirim ke domain lain. Untuk Chrome, atribut path harus selalu asal

  Catatan. Tanda hubung dianggap sebagai bagian dari awalan

  Catatan. Bendera ini hanya dapat disetel dengan atribut // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "test1=Hello; SameSite=None; Secure"; document.cookie = "test2=World; SameSite=None; Secure"; const cookieValue = document.cookie .split('; ') .find((row) => row.startsWith('test2=')) ?.split('=')[1]; function showCookieValue() { const output = document.getElementById('cookie-value') output.textContent = `> ${cookieValue}` } function clearOutputCookieValue() { const output = document.getElementById('cookie-value') output.textContent = '' } 8

Catatan. Seperti yang Anda lihat dari kode di atas, // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "test1=Hello; SameSite=None; Secure"; document.cookie = "test2=World; SameSite=None; Secure"; const cookieValue = document.cookie .split('; ') .find((row) => row.startsWith('test2=')) ?.split('=')[1]; function showCookieValue() { const output = document.getElementById('cookie-value') output.textContent = `> ${cookieValue}` } function clearOutputCookieValue() { const output = document.getElementById('cookie-value') output.textContent = '' } 9 adalah dengan fungsi penyetel dan pengambil asli, dan akibatnya bukan dengan nilai. apa yang Anda tulis tidak sama dengan apa yang Anda baca, semuanya selalu dimediasi oleh juru bahasa JavaScript

// Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "name=oeschger; SameSite=None; Secure"; document.cookie = "favorite_food=tripe; SameSite=None; Secure"; function showCookies() { const output = document.getElementById('cookies') output.textContent = `> ${document.cookie}` } function clearOutputCookies() { const output = document.getElementById('cookies') output.textContent = '' }

<button title="showCookies()">Show cookies</button> <button title="clearOutputCookies()">Clear</button> <div> <code id="cookies"></code> </div>

// Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "test1=Hello; SameSite=None; Secure"; document.cookie = "test2=World; SameSite=None; Secure"; const cookieValue = document.cookie .split('; ') .find((row) => row.startsWith('test2=')) ?.split('=')[1]; function showCookieValue() { const output = document.getElementById('cookie-value') output.textContent = `> ${cookieValue}` } function clearOutputCookieValue() { const output = document.getElementById('cookie-value') output.textContent = '' }

<button title="showCookieValue()">Show cookie value</button> <button title="clearOutputCookieValue()">Clear</button> <div> <code id="cookie-value"></code> </div>

Untuk menggunakan kode berikut, silakan ganti semua kemunculan kata <button title="showCookieValue()">Show cookie value</button> <button title="clearOutputCookieValue()">Clear</button> <div> <code id="cookie-value"></code> </div> 0 (nama cookie) dengan nama kustom

function doOnce() { if (!document.cookie.split('; ').find((row) => row.startsWith('doSomethingOnlyOnce'))) { // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "doSomethingOnlyOnce=true; expires=Fri, 31 Dec 9999 23:59:59 GMT; SameSite=None; Secure"; const output = document.getElementById('do-once') output.textContent = '> Do something here!' } } function clearOutputDoOnce() { const output = document.getElementById('do-once') output.textContent = '' }

<button title="doOnce()">Only do something once</button> <button title="clearOutputDoOnce()">Clear</button> <div> <code id="do-once"></code> </div>

function resetOnce() { // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "doSomethingOnlyOnce=; expires=Thu, 01 Jan 1970 00:00:00 GMT; SameSite=None; Secure"; const output = document.getElementById('reset-once') output.textContent = '> Reset!' } function clearOutputResetOnce() { const output = document.getElementById('reset-once') output.textContent = '' }

<button title="resetOnce()">Reset only once cookie</button> <button title="clearOutputResetOnce()">Clear</button> <div> <code id="reset-once"></code> </div>

document.cookie = newCookie; 0

document.cookie = newCookie; 1

document.cookie = newCookie; 2

document.cookie = newCookie; _3

Penting untuk diperhatikan bahwa atribut <button title="showCookieValue()">Show cookie value</button> <button title="clearOutputCookieValue()">Clear</button> <div> <code id="cookie-value"></code> </div> 1 tidak melindungi dari pembacaan cookie yang tidak sah dari jalur yang berbeda. Itu dapat dengan mudah dilewati menggunakan DOM, misalnya dengan membuat elemen <button title="showCookieValue()">Show cookie value</button> <button title="clearOutputCookieValue()">Clear</button> <div> <code id="cookie-value"></code> </div> 2 tersembunyi dengan jalur cookie, lalu mengakses properti <button title="showCookieValue()">Show cookie value</button> <button title="clearOutputCookieValue()">Clear</button> <div> <code id="cookie-value"></code> </div> 3 iframe ini. Satu-satunya cara untuk melindungi cookie adalah dengan menggunakan domain atau subdomain yang berbeda, karena kebijakan asal yang sama

Cookie sering digunakan dalam aplikasi web untuk mengidentifikasi pengguna dan sesi yang diautentikasi. Mencuri cookie dari aplikasi web mengarah pada pembajakan sesi pengguna yang diautentikasi. Cara umum untuk mencuri cookie termasuk menggunakan rekayasa sosial atau dengan mengeksploitasi kerentanan cross-site scripting (XSS) dalam aplikasi -

document.cookie = newCookie; _4

Atribut cookie <button title="showCookieValue()">Show cookie value</button> <button title="clearOutputCookieValue()">Clear</button> <div> <code id="cookie-value"></code> </div> 4 dapat membantu mengurangi serangan ini dengan mencegah akses ke nilai cookie melalui JavaScript. Baca lebih lanjut tentang Cookie dan Keamanan

• Dimulai dengan Firefox 2, tersedia mekanisme yang lebih baik untuk penyimpanan sisi klien - WHATWG DOM Storage
• Anda dapat menghapus cookie dengan memperbarui waktu kedaluwarsanya menjadi nol
• Ingatlah bahwa semakin banyak cookie yang Anda miliki, semakin banyak data yang akan ditransfer antara server dan klien untuk setiap permintaan. Ini akan membuat setiap permintaan lebih lambat. Sangat disarankan bagi Anda untuk menggunakan WHATWG DOM Storage jika Anda ingin menyimpan data "khusus klien"
• RFC 2965 (Bagian 5. 3, "Implementation Limits") menetapkan bahwa tidak boleh ada panjang maksimum dari ukuran kunci atau nilai cookie, dan mendorong implementasi untuk mendukung cookie besar yang sewenang-wenang. Implementasi maksimum setiap browser pasti akan berbeda, jadi bacalah dokumentasi masing-masing browser

Alasan properti pengakses // Note that we are setting `SameSite=None;` in this example because the example // needs to work cross-origin. // It is more common not to set the `SameSite` attribute, which results in the default, // and more secure, value of `SameSite=Lax;` document.cookie = "test1=Hello; SameSite=None; Secure"; document.cookie = "test2=World; SameSite=None; Secure"; const cookieValue = document.cookie .split('; ') .find((row) => row.startsWith('test2=')) ?.split('=')[1]; function showCookieValue() { const output = document.getElementById('cookie-value') output.textContent = `> ${cookieValue}` } function clearOutputCookieValue() { const output = document.getElementById('cookie-value') output.textContent = '' } _9 adalah karena sifat cookie server-klien, yang berbeda dari metode penyimpanan klien-klien lainnya (seperti, misalnya, penyimpanan lokal)

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