Selection input

The dropdown is the workhorse of any form, and WebApp_Selectioninput is this pack's version: the control that lets your app users pick from a fixed list - aspect ratios, checkpoint names, style presets, anything that shouldn't be free text. It's the most feature-complete of the input nodes, with multi-select, a "hidden full value" trick, and three outputs that give you the pick three different ways.

Same pack model as all the controls: you define it as a node in your ComfyUI graph, export the workflow API, and a framework like Simian WebApps renders the real dropdown and sends the selection back.

The inputs that matter

• options (STRING, multiline) - the selectable choices, new-line separated. One option per line.
• default (STRING) - the option pre-selected when the app loads.
• full_options (STRING, multiline) - this is the clever one. You can show users a short, readable string but pass a full, more complex value downstream. One full_options entry per options line, and the selected item's hidden full string is what flows out the full_value output. So the app shows "SDXL" while the workflow gets "stabilityai/stable-diffusion-xl-base-1.0".
• maximum (INT, default 1) - how many items can be selected at once. Set it above 1 and you get a multi-select; the outputs become lists of the picked values.
• value_in (COMBO) - the value used when running the workflow in ComfyUI. In the canvas this is a dropdown widget; the pack's front-end JS turns your options text into that widget so you can test locally.

The outputs

• Option index (INT, a list) - the index of each selected option in the options list.
• full_value (STRING, a list) - the hidden full string for each selection.
• value (STRING, a list) - the selected option text itself.
• Order + 1 (INT) - the usual auto-sequence chain slot.

advanced, parent, tooltip, and value_from_interface behave like the rest of the pack.

Installing it

cd ComfyUI/custom_nodes
git clone https://github.com/MonkeyProof-Solutions-BV/ComfyUI_webapp

Restart ComfyUI, or use ComfyUI Manager → search ComfyUI_webapp ("WebApp API"). No models, no keys; dependencies are pillow and torch only.

Gotchas

Two real ones. First, full_options must line up with options - if the counts don't match, the node can't map the selection and full_value comes back as [None]. Keep them in the same order and same length. Second, the pack's version caveat: it's built on the newer backend node API (comfy_api.latest), so a stale ComfyUI won't load it. Update ComfyUI first, then check your option lists.