How to get current version of some node.js package?

Question

How to get current version (that will be installed according to package-lock.json or yarn.lock) of some package from package-lock.json and yarn.lock?

Is any API (not a command line tool) to be more independent from format in future?

For example I whould like to do with node same as this perl code snippet:

use strict;
use warnings;
use 5.010;
 
use version;
 
my @versions = ( 'v5.11', '5.011', '5.012', '5.1.1', '5.1.2', '5.10',  '5.10_01');
 
 
my @sorted = sort { version->parse( $a ) <=> version->parse( $b ) } @versions;
for my $s (@sorted) {
    say $s;
}

When you say current, do you mean installed version or latest? — Lawrence Cherone, Oct 16 '20 at 16:13
I add notice - actually to check before installed (same as `yarn outdated` ses) — fl-web, Oct 16 '20 at 16:42
Does this answer your question? [Find the version of an installed npm package](https://stackoverflow.com/questions/10972176/find-the-version-of-an-installed-npm-package) — Lawrence Cherone, Oct 16 '20 at 16:44
you could also use `npm outdated --json` if you want to do it programmatically. — Lawrence Cherone, Oct 16 '20 at 16:49
I am asking API not a command line tool - suggested already answered question is not match requirement. — fl-web, Oct 16 '20 at 16:58
npm is not built into node, so no there is no API use `child_process` to execute the cmd. — Lawrence Cherone, Oct 16 '20 at 17:00
That is just operations with a strings - sure already exists and used in `yarn`/`npm` - do we need to spawn `sed` or `awk` to just operation with strings? — fl-web, Oct 16 '20 at 17:04
no as previously mentioned there is `--json` format which you can do JSON.parse on — Lawrence Cherone, Oct 16 '20 at 17:04
Not a question how to parse json but how to parse and compare versions — fl-web, Oct 16 '20 at 17:06
also you can `require('./package.json')` or `require('./package-lock.json')` if you want an initial list before running anything. — Lawrence Cherone, Oct 16 '20 at 17:06
Not a question how to parse json but how to parse and compare versions - josn format may be changed and version is more complicated format than just numbers and dots (for example `^7.0.0`) — fl-web, Oct 16 '20 at 17:08
versions will be in semvar, again nothing built in to compare versions but you could use a package https://www.npmjs.com/package/semver or if thats to heavy there is this https://github.com/substack/semver-compare/blob/master/index.js — Lawrence Cherone, Oct 16 '20 at 17:09
@Lawrence Cherone - you have to say `nothing built in to compare versions` - but there is an comparision `semver.gt('1.2.3', '9.8.7')` — fl-web, Oct 16 '20 at 17:15

score -1 · Answer 1 · answered Oct 16 '20 at 16:27

-1

If cowsay is your package,

$ npm list cowsay

answered Oct 16 '20 at 16:27

Rajika Imal

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How to get current version of some node.js package?

1 Answers1