Code snippets that go along with the blog post ~ Respect User Choice ~ Do Not Track

anomalousWinVersions.js

var anomalousWinVersions = ['Windows NT 6.1', 'Windows NT 6.2', 'Windows NT 6.3'];

dnt-helper-example-usage.js

// include the helper
<script src="js/libs/dnt-helper.js"></script>
// If doNotTrack is not enabled, it is ok to add GTM
if (!_dntEnabled()) {
  (function(w,d,s,l,i,j,f,dl,k,q){
    w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});f=d.getElementsByTagName(s)[0];
    k=i.length;q='//www.googletagmanager.com/gtm.js?id=@&l='+(l||'dataLayer');
    while(k--){j=d.createElement(s);j.async=!0;j.src=q.replace('@',i[k]);f.parentNode.insertBefore(j,f);}
  }(window,document,'script','dataLayer',['YOUR-GTM-ID}}']));
}

dnt-status.js

var dntStatus = navigator.doNotTrack || window.doNotTrack || navigator.msDoNotTrack;

fx-match.js

} else if (fxMatch && parseInt(fxMatch[1], 10) < 32) {
    // Can't say for sure if it is 1 or 0, due to Fx bug 887703
    dntStatus = 'Unspecified';

old-ie.js

// With old versions of IE, DNT did not exist so we simply return false;
    if (isIE && typeof Array.prototype.indexOf !== 'function') {
        return false;
    ...

unspecified.js

} else {
    // sets dntStatus to Disabled or Enabled based on the value returned by the browser.
    // If dntStatus is undefined, it will be set to Unspecified
    dntStatus = { '0': 'Disabled', '1': 'Enabled' }[dntStatus] || 'Unspecified';
}

wndows.js

} else if (isIE && platform && anomalousWinVersions.indexOf(platform.toString()) !== -1) {
    // default is on, which does not honor the specification
    dntStatus = 'Unspecified';
    ...