MediaWiki:Common.js

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document.querySelectorAll('.tooltip-cell').forEach(cell => {
  const tooltip = cell.querySelector('.tooltip-text');
  
  cell.addEventListener('mouseenter', (event) => {
    // Show the tooltip to calculate its position
    tooltip.style.visibility = 'visible';
    tooltip.style.opacity = '1';

    // Get the tooltip's position relative to the viewport
    const rect = tooltip.getBoundingClientRect();
    const windowHeight = window.innerHeight;

    // Adjust tooltip position if it goes off the screen
    if (rect.bottom > windowHeight) {
      tooltip.style.top = `${-10 - (rect.bottom - windowHeight)}px`;
    }
  });

  cell.addEventListener('mouseleave', () => {
    // Reset tooltip position and visibility
    tooltip.style.top = '-10px';
    tooltip.style.visibility = 'hidden';
    tooltip.style.opacity = '0';
  });
});