2.35kb vanilla JS lib that manage display of banner to accept/reject cookies from tracking services like Google Analytics - GDPR complient
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Latest commit 669991b Jun 28, 2018

README.md

Cookies EU banner

Manage display of banner to accept/reject cookies from tracking services like Google Analytics.

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Installation

Get the script

Using bower : bower install cookies-eu-banner --save Or using npm : npm install cookies-eu-banner --save Or download the latest version.

In your pages

Insert the banner before any content at the beginning of the <body> element, with these IDs:

<div id="cookies-eu-banner" style="display: none;">
    By continuing your visit to this site, you accept the use of cookies by Google Analytics to make visits statistics.
    <a href="./read-more.html" id="cookies-eu-more">Read more</a>
    <button id="cookies-eu-reject">Reject</button>
    <button id="cookies-eu-accept">Accept</button>
</div>
  • #cookies-eu-banner is the div that contains all elements to be hidden after user accepts or declines the use of cookies;
  • #cookies-eu-more is a link to a "Read more" page where you explain your use of cookies;
  • #cookies-eu-reject and #cookies-eu-accept are the buttons used to reject/accept cookies.

Before the end of <body>, or in a script file inserted at the same place, put the following code:

<script src="./bower_components/cookies-eu-banner/dist/cookies-eu-banner.min.js"></script>
<script>
    new CookiesEuBanner(function(){
        // Your code to launch when user accept cookies
    });
</script>

Example for Google Analytics:

<script src="./bower_components/cookies-eu-banner/dist/cookies-eu-banner.min.js"></script>
<script>
    new CookiesEuBanner(function(){
        (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
        (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
        m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
        })(window,document,'script','//www.google-analytics.com/analytics.js','ga');

        // Don't forget to put your own UA-XXXXXXXX-X code
        ga('create', 'UA-XXXXXXXX-X', 'auto');
        ga('send', 'pageview');
    });
</script>

Options

waitAccept

<script>
    new CookiesEuBanner(function(){
        // Your code to launch when user accept cookies
    }, true);
</script>

The second parameter (true in the example over it) defined if Cookie EU banner wait the user acceptation before hide the banner. Set to false by default.

How does it work?

For a detailed explaination, see comments in the main file : cookies-eu-banner.js.

In short:

  1. Excludes bots, clients who have DoNotTrack activated, and users who have already declined;
  2. Runs your custom function if user has already accepted;
  3. Shows banner, then:
    • if user accepts, run custom function and put a cookie to save this acceptance;
    • if user declines, remove all Google Analytics cookies and put a cookie to save this rejection.

Functionalities

  • Do Not Track detection (IE9+, Firefox, and all browsers compatible with the navigator.doNotTrack JavaScript variable);
  • Disables banner when visitor is a bot : prevents SEO Engines to confuse your cookie advert message with the main content of your pages;
  • Respects all points imposed by CNIL (FR) and these points.

Contribute

This project use a Gulpfile, to use it, you need to have node.js and npm (included in node.js installation). Then, in the Cookies EU banner folder, run these commands:

npm install
npm install -g gulp
gulp build

The first line install all dependancies listed in package.json. Second line install gulp as command, so you could now launch the third line which build the project.

Supported browsers

All navigators which supports JavaScript. Take a look at navigators that implements DoNotTrack.