Struct PackageJson 

pub struct PackageJson { /* private fields */ }

Browser-favoring conditional-exports resolver over a parsed package.json.

Resolves the bare entry and subpaths to relative file paths using the condition order browsers want — browser → module → import → default (never node/require) — with a module → browser → main fallback when there is no exports field. Enough of the Node resolution algorithm to generate an ES-module import map; not a general-purpose resolver.

Implementations

impl PackageJson

pub fn from_path(path: &Path) -> Result<Self, Box<dyn Error>>

Read and parse a package.json from disk.

pub fn from_json(s: &str) -> Result<Self, Box<dyn Error>>

Parse a package.json from a JSON string (e.g. read out of a tarball).

pub fn from_value(raw: Value) -> Self

Wrap an already-parsed JSON document.

pub fn name(&self) -> Option<&str>

The "name" field, if present.

pub fn version(&self) -> Option<&str>

The "version" field, if present.

pub fn package_type(&self) -> PackageType

Module when "type": "module", else CommonJs (Node’s default).

pub fn resolve_main(&self) -> Option<String>

Resolve the bare entry (the . export) to a relative path, for the browser.

pub fn resolve_subpath(&self, subpath: &str) -> Option<String>

Resolve a subpath (e.g. "./helpers/decorate"; leading ./ optional) via the exports map — exact key first, then the longest "./…/*" pattern.

pub fn entries(&self) -> Vec<Entry>

Enumerate the import-map-worthy entries: the bare entry, concrete subpaths, and "./*"-pattern prefixes.

pub fn referenced_paths(&self) -> Vec<String>

Every relative path the resolution references (concrete targets + pattern directories) — used to keep the right files when vendoring, even under src/.

Trait Implementations

impl Clone for PackageJson

fn clone(&self) -> PackageJson

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PackageJson

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.