javascript - What is colon : in npm script names?

Question

Trying to figure out what putting : in an npm script name does. For example:

package.json

"test:ci": "rest of script"

what would :ci do? running npm run test:ci fails

I can't find anything bash syntax really.

Answer 1

I believe it's just a naming convention to group a set of related tasks. For example you might have

"test:ci": ...
"test:units": ....
"test:integration"...

In this case it is grouping a related set of test tasks.

It would be down to the package author to specify. You can split tasks out like described in the answer above and then have a 'global' test command which combines each of them e.g. test:ci && test:unit && test:integration enabling you to run them all at once or when individually when needed.

You can use npm-run-all (link) and use the command npm-run-all test:*, which would then find all scripts starting with the test: group.