[SOLVED] Which Node version should I use to develop my package?

Which Node version should I use to develop my package?

I'm currently developing my package with Node v12.14.0 on my local machine but a PR I received from Dependabot made me think about how that influences the compatibility of my library.

If I develop my library using v12 features it shouldn't be able to work if run in other versions that have conflicting breaking changes, right?
I never bothered specifying an engine restriction in my package.json, is that something I should do? Or is it something that I shouldn't worry about?
If there is more than one active LTS version, which one should I use?

I'm just looking to know if there's any "standard"/recommended way to handle this, or if I should just decide which works best for me and not worry about that.

Solution

There is no "standard" way to handle this. You can put the node version in package.json to define the minimal engine version.

{ "engines" : { "node" : ">=0.12" } }

If you want to make it available for most of the developers, use the active LTS version. Dubnium (v10) is still supported, so you can define it as a minimum requirement to make it available virtually to everyone.