From the official demo: https://github.com/alexeagle/angular-bazel-example/blob/master/WORKSPACE

Bazel - NodeJS import and npm packages declaration

####################################
# Fetch and install the NodeJS rules
http_archive(
    name = "build_bazel_rules_nodejs",
    url = "https://github.com/bazelbuild/rules_nodejs/archive/0.7.0.zip",
    strip_prefix = "rules_nodejs-0.7.0",
    sha256 = "d0cecf6b149d431ee8349f683d1db6a2a881ee81d8066a66c1b112a4b02748de",
)

load("@build_bazel_rules_nodejs//:defs.bzl", "node_repositories")

node_repositories(package_json = ["//:package.json"])


####################################
# Tell Bazel about some workspaces that were installed from npm.
local_repository(
    name = "angular",
    path = "node_modules/@angular/bazel",
)

local_repository(
    name = "rxjs",
    path = "node_modules/rxjs/src",
)