(data via blockchain.info)

`; } catch (err) { statsDiv.textContent = 'Failed to load hash rate.'; console.error(err); } } refreshBtn.addEventListener('click', fetchHashRate); pdfBtn.addEventListener('click', () => { if (!statsDiv.innerText.trim() || statsDiv.innerText.includes('Failed')) { alert('Please refresh and display valid data before downloading.'); return; } const { jsPDF } = window.jspdf; const doc = new jsPDF({ unit: 'pt', format: 'letter' }); let y = 40; doc.setFontSize(16); doc.text('Bitcoin Hash Rate Monitor Report', 40, y); y += 30; const lines = statsDiv.innerText.split('\n'); doc.setFontSize(12); lines.forEach(line => { doc.text(line, 40, y); y += 18; }); doc.save('HashRate-Report.pdf'); }); fetchHashRate(); });