Fast lookup and iteration over all NPM package names
---
Includes a list of all package names on NPM. Updated daily, with optional local synchronization.
Packages which are deleted from NPM are removed from this list.
## Installation
```sh
npm install all-package-names
```
```sh
yarn add all-package-names
```
```sh
pnpm add all-package-names
```
```sh
bun add all-package-names
```
## Usage
> Uses binary search on the underlying dataset to quickly check for existence or iterate over packages with a given prefix without having to load the entire list into memory. However, the full list can also be loaded as a string array.
## API
Check if a package exists without loading the full array:
```ts
import allPackageNames from "all-package-names";
console.log(await allPackageNames.has("react")); // true
```
Iterate packages by prefix:
```ts
import allPackageNames from "all-package-names";
for await (const name of allPackageNames.iterPrefix("@types/")) {
console.log(name);
}
```
Load all names into memory as a string array:
```ts
import allPackageNames from "all-package-names";
const names = await allPackageNames.toArray();
```
Refresh the local files from the npm replication feed:
```ts
import allPackageNames from "all-package-names";
const result = await allPackageNames.refresh();
console.log(result);
```
## CLI
```
Stream, query, and maintain the all-package-names dataset
Usage: all-package-names [options] [command]
Options:
-p, --prefix [prefix] Only output package names with this prefix
-v, --version Display version
-h, --help Display help for command
Commands:
has Check whether a package name exists
sync Sync the local dataset from the npm replication feed
bootstrap Restore the local dataset from the latest GitHub release
```
Stream every package name, one per line:
```sh
all-package-names
```
Only stream names with a given prefix:
```sh
all-package-names --prefix @types/
```
This is useful for piping to other programs, for example:
```sh
all-package-names --prefix @types/ | grep react
```
**has**
Check whether a package exists with the `has` subcommand:
```sh
all-package-names has react
```
License 
[MIT](https://opensource.org/licenses/MIT) - _MIT License_
## Related Packages
- [package-name-conflict](https://npmjs.com/package/package-name-conflict): Check if NPM package names conflict
- [is-name-taken](https://npmjs.com/package/is-name-taken): Check if an NPM package name is taken
- [npms-io-client](https://npmjs.com/package/npms-io-client): Isomorphic typed client for npms.io
- [npm-pd](https://npmjs.com/package/npms-pd): A CLI dashboard for NPM publishers
