Local Storage property names

Normally, ThumbmarkJS will store its data in the local storage property thumbmark_visitor_id. Cache will be stored in thumbmark_cache.

You can override these property names by setting the property_name_factory option.

The property_name_factory option is a function that takes a string and returns a string. The function is called with names visitor_id and cache.

A simple implementation for renaming your properties could look like this:

const t = new Thumbmark(
    {
        api_key: 'your-api-key',
        property_name_factory: (name) => `${name}_your_suffix`,
    }
);

If you want to fully customize the property names, you can do something like:

const t = new Thumbmark(
    {
        api_key: 'your-api-key',
        property_name_factory: (name) => {
            if (name === 'visitor_id') {
                return 'your_visitor_id_property_name';
            } else if (name === 'cache') {
                return 'your_cache_property_name';
            }
            return `your_prefix_${name}`; // fallback for future-proofing
        },
    }
);