js 怎么获取剪贴板的内容

document.getElementById('pasteButton').addEventListener('click', async () => {
  try {
    const text = await navigator.clipboard.readText();
    console.log('剪贴板内容:', text);
  } catch (err) {
    console.error('无法读取剪贴板内容:', err);
  }
});

function fallbackPasteTextToClipboard(text) {
  const textArea = document.createElement("textarea");
  textArea.value = text;
  
  // 避免在屏幕上显示textArea
  textArea.style.position = 'fixed';
  textArea.style.top = '0';
  textArea.style.left = '0';
  textArea.style.width = '2em';
  textArea.style.height = '2em';
  textArea.style.padding = '0';
  textArea.style.border = 'none';
  textArea.style.outline = 'none';
  textArea.style.boxShadow = 'none';
  textArea.style.background = 'transparent';

  document.body.appendChild(textArea);
  textArea.focus();
  textArea.select();

  try {
    const successful = document.execCommand('copy');
    const msg = successful ? 'successful' : 'unsuccessful';
    console.log('Fallback: Copying text command was ' + msg);
  } catch (err) {
    console.error('Fallback: Oops, unable to copy', err);
  }

  document.body.removeChild(textArea);
}