from playwright.sync_api import sync_playwright
url="https://seaside.pacim.de/checkin.php?b=115266&h=ed2b5fb2b9c92c38670bfde0a8d2f7a0"
with sync_playwright() as p:
    b=p.chromium.launch(); pg=b.new_page(viewport={"width":440,"height":820},device_scale_factor=2)
    pg.goto(url,wait_until="networkidle"); pg.wait_for_timeout(500)
    dialogs=[]
    pg.on("dialog", lambda d: (dialogs.append(d.message), d.dismiss()))  # dismiss = Verwerfen

    # CASE A: click plate (edit), no change, click outside (Schiff row) -> no dialog, edit ends
    pg.click("#ci-plate", force=True); pg.wait_for_timeout(200)
    edA=pg.eval_on_selector("#ci-plate","el=>el.isContentEditable")
    pg.click("text=Schiff", force=True); pg.wait_for_timeout(400)
    print("A: editable-on-enter=%s dialogs=%d editable-after=%s"%(edA,len(dialogs),pg.eval_on_selector("#ci-plate","el=>el.isContentEditable")))

    # CASE B: edit + change + click outside -> dialog appears; dismiss -> revert to original
    dialogs.clear()
    pg.click("#ci-plate", force=True); pg.wait_for_timeout(150)
    pg.keyboard.press("End"); pg.keyboard.type("X"); pg.wait_for_timeout(150)
    pg.click("text=Schiff", force=True); pg.wait_for_timeout(400)
    print("B: dialog=%d msg=%r plate=%r editable-after=%s"%(len(dialogs), dialogs[0] if dialogs else "", pg.inner_text("#ci-plate"), pg.eval_on_selector("#ci-plate","el=>el.isContentEditable")))
    b.close()