# is-valid-app [![NPM version](https://img.shields.io/npm/v/is-valid-app.svg?style=flat)](https://www.npmjs.com/package/is-valid-app) [![NPM downloads](https://img.shields.io/npm/dm/is-valid-app.svg?style=flat)](https://npmjs.org/package/is-valid-app) [![Build Status](https://img.shields.io/travis/node-base/is-valid-app.svg?style=flat)](https://travis-ci.org/node-base/is-valid-app) > Wrapper around is-valid-instance and is-registered for validating `base` plugins. Returns true if `app` is a valid instance of base and a plugin is not registered yet. ## Install Install with [npm](https://www.npmjs.com/): ```sh $ npm install --save is-valid-app ``` ## Usage ```js var isValid = require('is-valid-app'); // in your Base plugin function plugin(app) { // plugin name is required as the second argument if (!isValid(app, 'my-plugin')) return; // do plugin stuff } ``` Optionally pass an array of instance types as the third argument: ```js function plugin(app) { if (!isValid(app, 'my-plugin', ['view', 'collection'])) return; // do plugin stuff } ``` Visit [base](https://github.com/node-base/base) for more details. ## About ### Related projects * [base](https://www.npmjs.com/package/base): base is the foundation for creating modular, unit testable and highly pluggable node.js applications, starting… [more](https://github.com/node-base/base) | [homepage](https://github.com/node-base/base "base is the foundation for creating modular, unit testable and highly pluggable node.js applications, starting with a handful of common methods, like `set`, `get`, `del` and `use`.") * [is-registered](https://www.npmjs.com/package/is-registered): Util for Base that optionally prevents a plugin from being registered more than once on… [more](https://github.com/jonschlinkert/is-registered) | [homepage](https://github.com/jonschlinkert/is-registered "Util for Base that optionally prevents a plugin from being registered more than once on an instance") * [is-valid-instance](https://www.npmjs.com/package/is-valid-instance): Returns true if a value is a valid instance of Base. | [homepage](https://github.com/jonschlinkert/is-valid-instance "Returns true if a value is a valid instance of Base.") ### Contributing Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new). ### Building docs _(This document was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme) (a [verb](https://github.com/verbose/verb) generator), please don't edit the readme directly. Any changes to the readme must be made in [.verb.md](.verb.md).)_ To generate the readme and API documentation with [verb](https://github.com/verbose/verb): ```sh $ npm install -g verb verb-generate-readme && verb ``` ### Running tests Install dev dependencies: ```sh $ npm install -d && npm test ``` ### Author **Jon Schlinkert** * [github/jonschlinkert](https://github.com/jonschlinkert) * [twitter/jonschlinkert](http://twitter.com/jonschlinkert) ### License Copyright © 2016, [Jon Schlinkert](https://github.com/jonschlinkert). Released under the [MIT license](https://github.com/node-base/is-valid-app/blob/master/LICENSE). *** _This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.1.30, on September 11, 2016._