Universal NPM dependency resolver.

Designed with support for browsers and use with Node.js.

Resolves dependencies to absolute semver-compatible versions. Entry points listed in a dependency's package.json (e.g. main, typings) are returned in the resolution for loaders to pick up proper file mappings.

A new Resolver() will need to be constructed for each set of dependencies to be resolved. You may need a promise polyfill for the browser, and an npm registry with CORS enabled.

import { Resolver, NpmHttpRegistry } from '@stackblitz/turbo-resolver';

function resolve(dependencies){
  // const resolver = new Resolver(); // For server-side usage, uses https://registry.npmjs.org which doesn't have CORS enabled

  const resolver = new Resolver({
    registry: new NpmHttpRegistry({ registryUrl: 'https://registry.npmjs.cf/' })
  });

  return resolver.resolve(dependencies);
}

resolve({
  "rxjs": "~5.5.0",
  "left-pad": "*",
  "zone.js": "latest",
  "@angular/core": "~5.2.0"
}).then(results => console.log(results))

Possible options:

• registry - An object that implements fetch and batchFetch that can return NPM registry data. A custom registry source can be provided to read from your own database or private NPM registry.
• validatePeers - boolean - turns on/off peerDependencies validation, defaults to true.
• packageJsonProps - string[] - list of properties to retain from package.json for resolved versions.
• timeout - number - Number of milliseconds to attempt resolution before timing out.
• concurrency - number - Maximum number of concurrent registry operations, default value 4.

Example dependencies payload:

`{
  "rxjs": "~5.5.0",
  "left-pad": "*",
  "zone.js": "latest",
  "@angular/core": "~5.2.0"
}`

Resulting output:

{
  "appDependencies": {
    "rxjs": {
      "version": "5.5.6",
      "dependencies": {
        "symbol-observable": "symbol-observable@1.0.1"
      },
      "main": "./Rx.js",
      "typings": "./Rx.d.ts"
    },
    "left-pad": {
      "version": "1.2.0",
      "dependencies": {},
      "main": "index.js",
      "types": "index.d.ts"
    },
    "zone.js": {
      "version": "0.8.20",
      "dependencies": {},
      "main": "dist/zone-node.js",
      "browser": "dist/zone.js",
      "typings": "dist/zone.js.d.ts",
      "unpkg": "dist/zone.js"
    },
    "@angular/core": {
      "version": "5.2.6",
      "dependencies": {
        "rxjs": "rxjs@5.5.6",
        "zone.js": "zone.js@0.8.20",
        "tslib": "tslib@1.9.0"
      },
      "main": "./bundles/core.umd.js",
      "module": "./esm5/core.js",
      "typings": "./core.d.ts"
    }
  },
  "resDependencies": {
    "symbol-observable@1.0.1": {
      "dependencies": {},
      "typings": "index.d.ts"
    },
    "tslib@1.9.0": {
      "dependencies": {},
      "main": "tslib.js",
      "module": "tslib.es6.js",
      "typings": "tslib.d.ts"
    }
  },
  "warnings": {}
}

appDependencies includes resolutions and mappings for top-level dependencies requested.

resDependencies includes resolutions and mappings for sub-dependencies and their dependencies.

Warning responses will still contain a valid resolution, users should be notified of any warnings.

Example request:

{
  "zone.js": "^0.8.4",
  "rxjs": "*",
  "@angular/core": "5.2.6",
  "@angular/common": "5.2.5",
  "@angular/platform-browser": "5.2.6"
}

A requested peer dependency was installed as a top level dependency, so it isn't missing, but its resolved version doesn't satisfy one or more top-level dependencies.

{
  "warnings": {
    "invalidPeers": {
      "@angular/common@5.2.5": {
        "@angular/core": "5.2.5"
      },
      "@angular/platform-browser@5.2.6": {
        "@angular/common": "5.2.6"
      }
    }
  }
}

@angular/common@5.2.5 requests @angular/core@5.2.5 but @angular/core@5.2.6 was installed. @angular/platform-browser@5.2.6 requests @angular/common@5.2.6 but @angular/common@5.2.5 was installed.

Example request:

{"@angular/common": "5.2.6"}

A Peer dependency was missing from the top-level dependency. Includes which dependencies are missing, along with what top-level dependencies requested that peer, along with the semver range requested by the top-level dependency.

{
    "error": "MISSING_PEERS",
    "data": {
        "rxjs": {
            "@angular/common@5.2.6": "^5.5.0"
        },
        "@angular/core": {
            "@angular/common@5.2.6": "5.2.6"
        }
    }
}

Example request:

{"mmnt": "2.20.1"}

The request contains a package not found in the registry.

{
  "error": "PACKAGE_NOT_FOUND",
  "data": {
      "name": "mmnt"
  }
}

Example request:

{"moment": "~1337.0.0"}

The request contains a valid package with an invalid range. Includes which package was requested along with the improper range.

{
  "error": "UNSATISFIED_RANGE",
  "data": {
      "name": "moment",
      "range": "~1337.0.0"
  }
}

The request has timed out:

{ "error": "TIMEOUT" }