Install ComfyUI.
Install ComfyUI-Manager
Look up this extension in ComfyUI-Manager. If you are installing manually, clone this repository under ComfyUI/custom_nodes.
Restart ComfyUI.

Features

PromptPresetSelector node

Input:

separator (str), default to |
preset_index (int) in range 1 to 50, default to 1
text (str), a multiline textarea
cleanup (bool), default to True

Output:

prompt (str), the formatted prompt
preset_index (int), the selected index

This node helps introducing variations to a text, usually a prompt, by supporting templates. Basically, you can include a template like this {% %} in your text, that will hold various options, separated by the separator.

Depending on the chosen preset_index, the correct preset option will be parsed and add to the text.

Example:

This is {% an example | a text | a text %} for {% the PromptPresetSelector | the README | %}

With preset_index == 1: This is an example for the PromptPresetSelector
With preset_index == 2: This is an text for the README
With preset_index == 3: This is an text for

The node validates that the separator is filled, that you registered the same amount of options in all of the templates, and that you selected a preset_index within the length of the configured presets.

Example:

If we fix preset_index to 3:

This is {% a text | a message %} for {% the PromptPresetSelector %} => Error, first template with 2 presets while the second only got 1
This is {% a text | a message %} for {% the PromptPresetSelector | the README %} => Error, only 2 presets were configured

A cleanup option is also provided, to clean spaces before comas, double or empty comas and empty lines, that may result from the preset application.

Web folder

PromptColorEditor

This extension adds a contentEditable div on top of the text textarea of the PromptPresetSelector to display the tags with some color. The colors will be displayed when the textarea loses focus, and will disappear when focused.

Currently, tags and separators will have the same color, and the unselected presets will be grayed out. The colors are also updated live when the selector or preset_index values are changed

TODO

Add JS to transform the preset_index in a dynamic dropdown, based on the configured presets
Add field to name the different presets
Add field to easily concatenate text at the end of the prompt