File Download

Saves a string to the user's machine as a real file download, fully client-side (Blob + object URL + a programmatic anchor click; the object URL is revoked after the save). This closes a genuine dead end: To CSV can produce CSV text, but nothing in the core node set could download the result.

No post-install configuration is required — importing the module registers the node. No API keys, no network access.

The Download File node

Found under Utilities in the node picker after import.

Port	Direction	Type	Notes
Content	input	string	The text to save. Objects/arrays wired in are JSON-encoded. Undefined/null (an unconnected input) fires Failure with a helpful Error instead of throwing; an empty string is a legitimate empty file.
Filename	input	string	Default download.txt. The name the browser saves under.
MIME Type	input	string	Default text/plain. Presets worth knowing: text/csv for CSV, application/json for JSON.
Download	input	signal	Performs the download.
Done	output	signal	Fires after the save is handed to the browser.
Failure	output	signal	Fires when the download could not be performed.
Error	output	string	Why the download failed; cleared to empty on success.

Typical wiring (the shipped demo component)

The module ships a Download CSV Example component:

Static Data (JSON rows) ──items──▶ To CSV ──CSV──▶ Download File (Content)
Button ──Click──────────────────────────────────▶ Download File (Download)

with Filename set to export.csv and MIME Type set to text/csv. Swap the Static Data node for your own array (a query result, a Variable, a Function output) and the button saves it as a CSV file.

Notes

• Browser-only: the node needs document, Blob and URL.createObjectURL. In an environment without them (e.g. server-side rendering) the Download signal fires Failure with an explanatory Error instead of crashing.
• The download is triggered by a hidden <a download> click, so browsers treat it as a user-initiated save when wired to a click signal.