/**
* 打印指定 DOM 区域（替代 vue-print-nb）
*/
export function printElement(elementId, title = "打印") {
const el = document.getElementById(elementId);
if (!el) {
console.warn(`[print] element #${elementId} not found`);
return;
}
const iframe = document.createElement("iframe");
iframe.style.cssText = "position:fixed;right:0;bottom:0;width:0;height:0;border:0";
document.body.appendChild(iframe);
const doc = iframe.contentWindow.document;
doc.open();
doc.write(
`${title}${el.innerHTML}`
);
doc.close();
iframe.contentWindow.focus();
iframe.contentWindow.print();
setTimeout(() => document.body.removeChild(iframe), 1000);
}