<script type = "text/javascript" defer src = "https://cdn.preprod.first-id.fr/sdk/loader/loader.min.js" > < /script>

    <script type = "text/javascript" >
   // create firstId SDK configuration
   window.firstId = window.firstId || {
       callbacks: [],
       debug: true, // by default debug mode is on false. Debug mode will be enable log message in console
       cookieName: 'firstId' // by default the SDK will expect find a cookie with name "firstId" where the FirstID value is store. You can override the cookie name (if you store the FirstID in another cookie name) with the config key "cookieName"
   };

// register callback will be call when SDK load
// callback will be call in same order as push in array
window.firstId.callbacks.push(() => console.log('FirstID is loaded !'))

window.firstId.callbacks.push(() => {
       // you can use firstID with 2 ways :

        // Built a new instance of SDK
       let fid = new FirstIdSdk();

        // call some method
       console.log(fid.getVersion());

        // or you can use the global var FIRSTID
       console.log(FIRSTID.getVersion());

        // to read the FirstID :
       try {
           let firstIdValue = fid.getId();
       } catch (e) {
           // catch error
           if (e.code === 'FirstIdCookieNotFound') {
               // the cookie specify in config was nos foud
           }

            if (e.code === 'FirstIdEmptyValue') {
               // the cookie was found, but the value if empty
           }
       }
   }) </script>