Tab
This example demonstrates how you can observe and handle changes to the browser's location hash.
The location hash can be accessed using q.args['#'].
from h2o_wave import main, app, Q, ui
@app('/demo')
async def serve(q: Q):
content = 'Welcome to our store!'
location = q.args['#']
if location:
if location == 'menu/spam':
content = "Sorry, we're out of spam!"
elif location == 'menu/ham':
content = "Sorry, we're out of ham!"
elif location == 'menu/eggs':
content = "Sorry, we're out of eggs!"
elif location == 'about':
content = 'Everything here is gluten-free!'
if not q.client.initialized:
q.page['nav'] = ui.tab_card(
box='1 1 4 1',
items=[
ui.tab(name='#menu/spam', label='Spam'),
ui.tab(name='#menu/ham', label='Ham'),
ui.tab(name='#menu/eggs', label='Eggs'),
ui.tab(name='#about', label='About'),
],
value=f'#{location}' if location else None,
)
q.page['blurb'] = ui.markdown_card(
box='1 2 4 2',
title='Store',
content=content,
)
q.client.initialized = True
elif location:
blurb = q.page['blurb']
blurb.content = content
await q.page.save()