The silent template outputs nothing at all. Why would that be useful? Primarily for running JSDoc as a linter to check for syntax errors and unrecognized tags in documentation comments, although it may also be useful for testing or benchmarking purposes.
./jsdoc myscript.js -t templates/silent -a all --pedantic
This command exits with a non-zero exit code if any errors are encountered. It writes nothing to disk and the only output it produces is any error messages written to stderr. This command can also be used to warn about tags which are unknown to JSDoc by setting "allowUnknownTags": false in a configuration file.