[](https://travis-ci.org/PolymerElements/iron-component-page)
[](https://beta.webcomponents.org/element/PolymerElements/iron-component-page)
## <iron-component-page>
`iron-component-page` is a full-page documentation browser for custom elements,
mixins, classes, and more. It consumes the JSON descriptor format produced by
[Polymer Analyzer](https://github.com/Polymer/polymer-analyzer).
You may also be interested in the
[`iron-doc-*`](https://github.com/PolymerElements/iron-doc-viewer) element
collection which underlies this element and can be used to embed documentation
in other apps (for example, [webcomponents.org](https://www.webcomponents.org)
does this).
### Documenting your element
`iron-component-page` is designed to make it easy to view documentation for
your custom element project.
1. Install the [Polymer CLI](https://github.com/Polymer/polymer-cli) with `npm
install -g polymer-cli` or `yarn global add polymer-cli`. This gives you a
command-line interface to Polymer Analyzer (among other things).
2. `cd` to your project directory. This can be a custom element, a full app, or
even a plain JavaScript library. Polymer Analyzer will discover all of the
interesting items recursively in your project directory.
3. Analyze your project with `polymer analyze > analysis.json`. This produces a
JSON descriptor file. By default `iron-component-page` will look for a file
called `analysis.json` (you can override this with the `descriptor-url`
property).
4. Add `iron-component-page` as a dev dependency of your project: `bower
install iron-component-page --save-dev`.
5. Create an HTML file to instantiate an `iron-component-page` element (e.g.
`index.html` or `docs.html`). Note that you may need to adjust your import
paths depending on your project layout:
```html
```
6. Serve that page using any local web server, such as `polymer serve` or
`python -m SimpleHTTPServer`.
### Routing
`iron-component-page` handles URL routing (via `iron-doc-viewer`) to provide
permanent addresses for all locations in the documentation tree, including
scroll anchor targets.
By default it uses the URL fragment for routing (e.g.
`docs.html#/elements/my-element#property-foo`), in order to support simple
static file hosts.
To use the real URL path for routing, set the `base-href` property to the
server mount point (e.g. `/api/docs` or *empty string* for the root path). Note
that this requires a host that serves the application from all paths that
should be handled by the doc viewer.
### Styling
`iron-component-page` uses the default theme from
[`iron-doc-viewer`](https://github.com/PolymerElements/iron-doc-viewer). See
its documentation for styling. The following custom properties and mixins are
also available:
Custom property | Description | Default
----------------|-------------|----------
`--iron-component-page-header-color` | Background color of main header. | `paper-pink-600`
### Previous versions
The 3.x `iron-component-page` described here has major breaking changes versus
the 1.x and 2.x versions. Previous versions were based on *Hydrolysis*, the
predecessor to Polymer Analyzer. Major changes in the 3.x version include:
* Uses Polymer Analyzer descriptors instead of Hydrolysis. Among other things,
this adds support for classes, mixins, and Polymer 2 elements.
* Does not analyze your source in the browser. Instead, run `polymer analyze`
to generate an `analysis.json` file offline.
* Replaces the element menu with a full-size navigation panel that summarizes
all the available documentation produced by Polymer Analyzer.
* Uses the 3.x version of the
[`iron-doc` elements](https://github.com/PolymerElements/iron-doc-viewer).
If you still need the previous version, see the
[2.x branch](https://github.com/PolymerElements/iron-component-page/tree/2.x).