Creates a {{referrer}} custom smart tag in OptinMonster to output the referrer URL, or if it is empty redirect to another specific URL. Typically used in the "redirect to a URL" success action for an optin form or button element.

custom-smart-tag-redirect-to-referrer.js

function myReferrer() {
    var ref = document.referrer;
    
    if(!ref) {
        // redirect to a specific URL if referrer doesn't exist
        var redirect = 'https://optinmonster.com';
    } else var redirect = ref;
    
    // Let's print what referrer is being passed into the dev tools console, remove this in production
    console.log(ref);
    
    // And return our referrer variable.
    return ref;
}

myReferrer();

const addRef = myReferrer();
// custom smart tag in OM
document.addEventListener('om.Dtr.init', function (event) {
    event.detail.Dtr.setCustomVariable('referrer', addRef);
});