Derp Slider V2 Editor

Here's the honest pitch: the Derp Slider V2 Editor does nothing to your generation. No inputs, no outputs, no data flowing through the graph. It's a pure design-time tool - a sandbox where you tune how a Derp Slider looks, then save that look as a reusable style file. If you've never cared what a slider widget looks like, you can skip it entirely. If you're building a control surface you'll stare at all day, this is where the polish happens.

What it actually is

It ships in xcp_derp-UI-Release (comfy.icu knows it as "xcp_derp-UI"), the pack from lordwedggie that layers custom layouts, themes, docking and "wireless" signal routing on top of a normal ComfyUI graph. Its whole point is replacing the default control nodes with ones that look intentional instead of like a spaghetti incident. The Slider V2 is the pack's second-generation slider widget, and this editor is its fitting room.

The Python side is one line of truth: the node class is a pure virtual shell whose function is literally do_nothing and returns an empty tuple. Everything you see is front-end. That's a pattern worth knowing - a handful of derp-UI nodes are exactly this: UI-only surfaces that the backend registers so they exist in the node menu, but they never touch the inference pipeline.

How it works

The editor renders a live preview slider on the node face (a float from 0 to 1, step 0.01) plus a row of style controls. When you save, it packages the current style into a JSON file and POSTs it to the pack's /xcp/save/sliderV2Styles route; the load dropdown pulls files back through /xcp/load/sliderV2Styles. Saved styles live in ComfyUI/user/derpNodes/sliderV2Styles/ - plain JSON you can back up, hand to a friend, or wipe without touching your workflows.

The controls that matter, all on the face:

• Style preset dropdown - the base look (the built-in presets like the "knob" style).
• Canvas vs HTML render path - the same style can render two ways; HTML is the fancier painter path, and this is a global toggle, not per-slider.
• btnLR and Round knob toggles - button-style left/right arrows, and (for knob styles) whether the knob is round.
• Fill height and knob geometry (width scale, offsets) - the fine detail that separates a custom control from a default one.
• The style name field plus load / save / refresh buttons for style files.

Installing it

Same story as the whole pack - there's no separate install:

cd ComfyUI/custom_nodes
git clone https://github.com/lordwedggie/xcp_derp-UI-Release

Restart ComfyUI. Or open ComfyUI Manager → Custom Nodes Manager and search "xcp_derp-UI-Release" - same result. There's no requirements.txt and no model downloads: it's JS plus a thin Python shell that only uses ComfyUI's bundled environment. That's the good news for a pack this UI-heavy.

Where people trip

• It's not per-node styling. The editor tunes a style file that other sliders reference; it doesn't restyle the node you're looking at in place. Adjust, save, then point your slider at that style.
• The render path is global, so if your canvas-rendered slider and your HTML-rendered slider don't match, that's why - it's a pack-wide setting, not per-node.
• Empty style dropdown? Hit the refresh button; files live under user/derpNodes/sliderV2Styles and the list is fetched on demand.
• Weirdly broken face after an update - hard-refresh the browser (Ctrl+Shift+R). This pack ships a lot of front-end code and stale cached JS is the classic culprit.

One honest caveat: this is a young, niche pack with basically no community footprint yet. The editor is fiddly, and if you only need a slider, the plain Derp Slider is fine. Reach for the editor when the difference between "default widget" and "custom control surface" is the whole reason you installed the pack.