Look into the Latest DAT Viewer
This TouchDesigner showcase project was published by Derivative in 2022.
The new experimental release of TouchDesigner now includes DAT syntax highlighting for the TouchDesigner languages python, GLSL, JSON, XML, all inside the DAT Viewer. In addition, there are also options for custom zooming.
Programme information from Derivative (TouchDesigner) Community. Short excerpt quoted for reference; see the original page for full text, images and credits.