Make "wide mode" sticky

Today you can put Streamlit in “wide mode” via the Settings dialog in the UI. However, it would be great if the wide mode setting were sticky.

Option 1: just make Wide Mode sticky by persisting it in local storage!

Option 2: Provide a config option that toggles wide mode:

[browser]
wideMode = True

(for this we’d have to replicate much of the code used to propagate settings like browser.gatherUsageStats to the browser)

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Right now I favor Option 1 because it’s so much simpler – and we’ll probably be rethinking wide mode anyway, as soon as we add support for horizontal layout (Issue #241) . This is because at that point we may want to shift control over the app’s width onto the developer, rather than having it as a viewer setting.

[RNogales94]

Option two it’s better in my view. this way we could just add this line to our application:

st.set_option('wideMode' , True)

[akrolsmir]

We’ve settled on a slightly different proposal to achieve the same goals:

st.set_page_config(  # Alternate names: setup_page, page, layout
	layout="centered",  # Can be "centered" or "wide". In the future also "dashboard", etc.
	initial_sidebar_state="auto",  # Can be "auto", "expanded", "collapsed"
	page_title=None,  # String or None. Strings get appended with "• Streamlit". 
	page_icon=None,  # String, anything supported by st.image, or None.
)

I’d expect us to get to this relatively soon now that the product spec is finished! Removing “good first issue” because this will likely be handled by a Streamlit core member