When I run conda search -c conda-forge nodejs, I get:
# Name Version Build Channel
...
nodejs
Currently, the latest version nodejs 14.x requires icu>=65 which is not yet globally available across conda-forge packages. Therefore it can be installed into a new environment with conda create -n new_env_name -c conda-forge nodejs, but most likely will raise package conflicts in existing environments.
conda install node-js -c conda-forge installing the very old version 6.13.1 seems to be a solver problem. conda install nodejs -c conda-forge --repodata-fn=repodata.json will install a more current version: nodejs-13.x.
Alternative workaround is to use mamba as a conda replacement.
Credits go to Wolf Vollprecht.