StackGenVis/frontend/node_modules/assemble-streams/node_modules/is-valid-instance

is-valid-instance

Returns true if a value is a valid instance of Base.

Install

Install with npm:

$ npm install is-valid-instance --save

Usage

Use in your [base][] plugin to ensure that the plugin is registered on a valid instance.

var isValidInstance = require('is-valid-instance');

function plugin(app) {
  if (!isValidInstance(app)) return;
  // do plugin stauff
}

API

Params

• val {Object}
• names {Array|Function}: One or more names to check for on the given instance. Example app will check for app.isApp === true or app._name === 'app'.
• fn {Function}: Custom function for validating the instance.
• returns {Boolean}

Example

function plugin(app) {
  if (!isValidInstance(app)) return;
  // do plugin stuff
}

Examples

Collection instance

Return true if the instance is a [templates][] view-collection (views):

function plugin(collection) {
  if (!isValidInstance(collection, ['views'])) {
    // optionally return the plugin function so the plugin is re-tried on 
    // each instance until it finds the correct one
    return plugin;
  }
  // do plugin stauff
}

View instance

Return true if the instance is a [templates][] view:

function plugin(view) {
  if (!isValidInstance(view, ['view'])) {
    return plugin;
  }
  // do plugin stauff
}

View instance

Return true if the instance is either "app" or "collection":

function plugin(app) {
  if (!isValidInstance(app, ['app', 'collection'])) {
    return plugin;
  }
  // do plugin stauff
}

Related projects

You might also be interested in these projects:

• base-app: Starting point for creating a base application, with a few light plugins for running tasks… more | homepage
• base: base is the foundation for creating modular, unit testable and highly pluggable node.js applications, starting… more | homepage

Contributing

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.

Building docs

Generate readme and API documentation with verb:

$ npm install verb && npm run docs

Or, if verb is installed globally:

$ verb

Running tests

Install dev dependencies:

$ npm install -d && npm test

Author

Jon Schlinkert

• github/jonschlinkert
• twitter/jonschlinkert

License

Copyright © 2016, Jon Schlinkert. Released under the MIT license.

---

This file was generated by verb, v0.9.0, on May 15, 2016.