2.2. Static Block Replacement

block-replacement.js

const trackerClass = '.wp-block-rave-initiative-tracker',
    trackers = document.querySelectorAll( trackerClass );

trackers.forEach( ( tracker ) => {
    const attributes = {
        block_id: tracker.dataset.id,
        post_id: parseInt( tracker.dataset.post_id, 10 ),
    };
    
    render(
        <FrontendTracker dataAttributes={ attributes } />,
        tracker
    );
} );