可以在各种移动Web浏览器中进行签名捕获？

const canvas = document.getElementById('signature-canvas');
const ctx = canvas.getContext('2d');

ctx.strokeStyle = 'black';
ctx.lineWidth = 2;

let isDrawing = false;
let lastX = 0;
let lastY = 0;

canvas.addEventListener('touchstart', (event) => {
  const touch = event.touches[0];
  const { clientX, clientY } = touch;
  lastX = clientX;
  lastY = clientY;
  isDrawing = true;
});

canvas.addEventListener('touchmove', (event) => {
  if (!isDrawing) return;
  const touch = event.touches[0];
  const { clientX, clientY } = touch;
  const dx = clientX - lastX;
  const dy = clientY - lastY;
  ctx.beginPath();
  ctx.moveTo(lastX, lastY);
  ctx.lineTo(clientX, clientY);
  ctx.stroke();
  lastX = clientX;
  lastY = clientY;
});

canvas.addEventListener('touchend', () => {
  isDrawing = false;
});

const dataURL = canvas.toDataURL('image/png');