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Cookies

The principles of cookie handling at TNA are:

  • Create cookies on the client side (apart from session cookies)
  • Update cookies on the client side (apart from session cookies)
  • Reject by default (don't assume acceptance and don't add tracking until after they agree)

Policies

As standard we use four classes of cookies:

  • essential - we don't need to ask permission for these
  • usage - analytics, tracking, data gathering
  • settings - configured options for the site (e.g. default results view or static light/dark mode)
  • marketing - used mainly by third parties such as Google when we embed YouTube videos in the site

When you load in the tna-frontend JavaScript, it comes with a cookie library.

This is loaded into the window object as TNAFrontend.Cookies:

// Initialise a new Cookie instance
const cookies = new window.TNAFrontend.Cookies();

// Log all the cookies to the console
console.log(cookies.all);

If you are building your own JavaScript, you can import the cookies class from all.mjs or all+analytics.mjs:

import { Cookies } from "@nationalarchives/frontend/nationalarchives/all.mjs";

const cookies = new Cookies();

console.log(cookies.all);