static-cms/website/site/content/docs/beta-features.md

title	position
Beta Features!	200

Beta Features!

We run new functionality in an open beta format from time to time. That means that this functionality is totally available for use, and we think it might be ready for primetime, but it could break or change without notice.

Use these features at your own risk.

Custom Mount Element

Netlify CMS always creates it's own DOM element for mounting the application, which means it always takes over the entire page, and is generally inflexible if you're trying to do something creative, like injecting it into a shared context.

You can now provide your own element for Netlify CMS to mount in by setting the target element's ID as nc-root. If Netlify CMS finds an element with this ID during initialization, it will mount within that element instead of creating it's own.

Manual Initialization

Netlify CMS can now be manually initialized, rather than automatically loading up the moment you import it. The whole point of this at the moment is to inject configuration into Netlify CMS before it loads, bypassing need for an actual config.yml. This is important, for example, when creating tight integrations with static site generators.

Injecting config is technically already possible by setting window.CMS_CONFIG before importing/requiring/running Netlify CMS, but most projects are modular and don't want to use globals, plus window.CMS_CONFIG is an internal, not technically supported, and provides no validation.

Assuming you have the netlify-cms package installed to your project, manual initialization works like so:

// This global flag enables manual initialization.
window.CMS_MANUAL_INIT = true

// Usage with import from npm package
import CMS, { init } from 'netlify-cms'

// Usage with script tag
const { CMS, initCMS: init } = window

/**
 * Initialize without passing in config - equivalent to just importing
 * Netlify CMS the old way.
 */

init()

/**
 * Optionally pass in a config object. This object will be merged into
 * `config.yml` if it exists, and any portion that conflicts with
 * `config.yml` will be overwritten. Arrays will be replaced during merge,
 * not concatenated.
 *
 * For example, the code below contains an incomplete config, but using it,
 * your `config.yml` can be missing it's backend property, allowing you
 * to set this property at runtime.
 */

init({
  config: {
    backend: {
      name: 'git-gateway',
    },
  },
})

// The registry works as expected, and can be used before or after init.
CMS.registerPreviewTemplate(...);

Raw CSS in registerPreviewStyle

registerPreviewStyle can now accept a CSS string, in addition to accepting a url. The feature is activated by passing in an object as the second argument, with raw set to a truthy value.This is critical for integrating with modern build tooling. Here's an example using webpack:

/**
 * Assumes a webpack project with `sass-loader` and `css-loader` installed.
 * Takes advantage of the `toString` method in the return value of `css-loader`.
 */
import CMS from 'netlify-cms';
import styles from '!css-loader!sass-loader!../main.scss'

CMS.registerPreviewStyle(styles.toString(), { raw: true })