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38 lines
1.3 KiB
38 lines
1.3 KiB
7 years ago
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# Additional information on Legacy frontend
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The legacy bundle is only used from Rails to add functionality to specific parts of the application.
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## Loading and bootstrapping the legacy AngularJS frontend
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To bootstrap the AngularJS frontend from Rails, use the `activate_angular_js` helper block:
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```html
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<!-- @see ./app/helpers/angular_helper.rb -->
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<%= activate_angular_js do %>
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<persistent-toggle identifier="repository.checkout_instructions">
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<div>
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Something rendered from Rails ...
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</div>
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</persistent-toggle>
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<% end %>
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```
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The legacy frontend with AngularJS can be bootstrapped _with_ content contained within. This is not possible in Angular,
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since the root component needs to be empty (or will be emptied during bootstrap).
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## Passing information and configuration from Rails to Angular
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There are three ways of passing information from Rails to `AngularJS`:
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1. Using tag attributes written directly to the DOM by the rendering process of Rails as in the example before.
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2. Using the `gon` gem
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This is included by all layouts in `<head>`:
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```js
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<%= include_gon(nonce: content_security_policy_nonce(:script)) %>
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```
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`gon` will provide arbitrary settings from Rails to all JavaScript functionality, including `AngularJS`. In an `angular` context a `ConfigurationService` is provided for picking up the settings.
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