code: function setupOffset({ id, offsetVal, stepClass }) {
    const el = document.createElement('div');
    el.setAttribute('id', getOffsetId({ id }));
    el.setAttribute('class', 'scrollama__debug-offset');
  
    el.style.position = 'fixed';
    el.style.left = '0';
    el.style.width = '100%';
    el.style.height = '0px';
    el.style.borderTop = '2px dashed black';
    el.style.zIndex = '9999';
  
    const text = document.createElement('p');
    text.innerText = `".${stepClass}" trigger: ${offsetVal}`;
    text.style.fontSize = '12px';
    text.style.fontFamily = 'monospace';
    text.style.color = 'black';
    text.style.margin = '0';
    text.style.padding = '6px';
    el.appendChild(text);
    document.body.appendChild(el);
  }
docs: SETUP