Skip to main content

Mode / Broadcast / Global

Launch the server in broadcast mode to synchronize browser state across users. Global variables can be used to manage state. Open /demo in multiple browsers and watch them synchronize in realtime.

from h2o_wave import main, app, Q, ui, pack

count = 0


@app('/demo', mode='broadcast')
async def serve(q: Q):
global count
if 'increment' in q.args:
count += 1

items = pack([ui.button(name='increment', label=f'Count={count}')])

if count > 0:
form = q.page['example']
form.items = items
else:
q.page['example'] = ui.form_card(box='1 1 2 1', items=items)

await q.page.save()

Tags:  broadcastmode