Conditional Nodes by Mikudes Comfy-Ui

A collection of utility nodes for building dynamic and configurable ComfyUI workflows.

Features

Conditional Nodes

• If True
• If True 3
• If True 4

These nodes compare the Trigger input with the Expected value.

If both strings match, the node outputs the If True input(s). Otherwise it outputs the optional Fallback input(s), if connected.

This makes it easy to switch between models, prompts, LoRAs or any other data based on a simple string value.

Example:

trigger == expected
        │
      Yes ──► If True Output(s)
      No  ──► Fallback Output(s) (optional)

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Merge Nodes

Merge First

Returns the first connected input that contains a valid value.

Useful when several conditional branches can produce an output and you only want to continue with the first available one.

Example:

Branch A ─┐
Branch B ─┼──► Merge First ─► Output
Branch C ─┘

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Constant Nodes

Const String

Outputs a fixed string value.

Useful for trigger values, model names or reusable workflow parameters.

Const Int

Outputs a fixed integer value.

Useful for seeds, steps or any integer input.

Const Float

Outputs a fixed float value.

Useful for CFG, strengths or other floating-point values.

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Dynamic Loaders

Load Diffusion From String

Loads a diffusion model using its filename.

Example:

flux1-dev.safetensors

The string must exactly match the filename inside your models/diffusion_models folder.

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Load Checkpoint From String

Loads a checkpoint using its filename.

Outputs:

• MODEL
• CLIP
• VAE

Example:

juggernautXL_v9.safetensors

The string must match a checkpoint inside your models/checkpoints folder.

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Load LoRA From String

Loads a LoRA by filename and applies it to a MODEL and CLIP.

If the LoRA name is empty, the original MODEL and CLIP are returned unchanged.

Example:

DetailTweaker.safetensors

The filename must exist inside your models/loras folder.

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Included Nodes

• If True
• If True 3
• If True 4
• Merge First
• Const String
• Const Int
• Const Float
• Load Diffusion From String
• Load Checkpoint From String
• Load LoRA From String

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Installation

Using ComfyUI Manager

Search for:

Conditional Nodes by Mikudes

and install.

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Manual Installation

Clone this repository into your custom_nodes folder.

Example locations:

C:\Comfy-Desktop\ComfyUI-Installs\ComfyUI\ComfyUI\custom_nodes

or

C:\Users\<username>\AppData\Local\Comfy-Desktop\ComfyUI-Installs\ComfyUI\ComfyUI\custom_nodes

Restart ComfyUI after installation.

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Example Use Cases

• Dynamic checkpoint selection
• Dynamic diffusion model selection
• Dynamic LoRA loading
• Shared workflows with multiple configurations
• Conditional workflow branches
• Cleaner workflows using Merge First

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License

MIT License