WhatsApp Web：Ctrl+Enter 发送消息

// Make Enter insert a newline and Ctrl/Cmd+Enter send the message
document.addEventListener('keydown', function (e) {
  const input = document.querySelector('footer div[contenteditable="true"][data-tab], footer [data-testid="conversation-compose-box-input"]');
  if (!input || document.activeElement !== input) return;
  if (e.key === 'Enter' && !e.shiftKey && !(e.ctrlKey || e.metaKey)) {
    e.stopPropagation();
    e.preventDefault();
    document.execCommand('insertLineBreak');
  } else if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) {
    e.stopPropagation();
    e.preventDefault();
    const sendBtn = document.querySelector('button[data-testid="compose-btn-send"], button[aria-label*="Send" i]');
    if (sendBtn) sendBtn.click();
  }
}, true);