Surface the 20 MB CSV upload cap in the upload UI#13
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Two changes:
- frontend/index.html: add an info-circle hint right below the file
input - "Max 20 MB - runs in your browser". The cap is now visible
before the user picks a file.
- frontend/js/app.js: rewrite the oversize error message to the
friendly text proposed in the issue ("File is too large for the
browser runtime - please subsample first (max 20 MB)."). The
client-side reject already exists at line 446-448 and runs before
the pyCallBinary call.
Files within the limit upload exactly as before. No Pyodide-side
changes - CLAUDE.md is explicit that the 20 MB cap is dictated by
Pyodide's WASM heap and should be surfaced rather than "fixed".
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Closes #11.
Changes
frontend/index.html— add an info-circle hint right below the file input: "Max 20 MB · runs in your browser". The cap is now visible before the user picks a file.frontend/js/app.js— rewrite the oversize error message to the friendly text the issue proposed:pyCallBinarycall, so an oversized file still never reaches Pyodide.Acceptance criteria
No Pyodide-side changes —
CLAUDE.mdis explicit that the 20 MB cap is dictated by Pyodide's WASM heap and should be surfaced rather than "fixed."AI was used for assistance.