76 lines
2.9 KiB
Markdown
76 lines
2.9 KiB
Markdown
# Angel3 SEO
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[](https://dart.dev/null-safety)
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[](https://gitter.im/angel_dart/discussion)
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[](https://github.com/dart-backend/angel/tree/master/packages/seo/LICENSE)
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Helpers for building SEO-friendly Web pages in Angel. The goal of `package:angel3_seo` is to speed up perceived client page loads, prevent the infamous [flash of unstyled content](https://en.wikipedia.org/wiki/Flash_of_unstyled_content), and other SEO optimizations that can easily become tedious to perform by hand.
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## Disabling inlining per-element
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Add a `data-no-inline` attribute to a `link` or `script` to prevent inlining it:
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```html
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<script src="main.dart.js" data-no-inline></script>
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```
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## `inlineAssets`
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A [response finalizer](https://angel3-docs.dukefirehawk.com/guides/request-lifecycle) that can be used in any application to patch HTML responses, including those sent with a templating engine like Jael3.
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In any `text/html` response sent down, `link` and `script` elements that point to internal resources will have the contents of said file read, and inlined into the HTML page itself.
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In this case, "internal resources" refers to a URI *without* a scheme, i.e. `/site.css` or `foo/bar/baz.js`.
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```dart
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import 'package:angel3_framework/angel3_framework.dart';
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import 'package:angel3_seo/angel3_seo.dart';
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import 'package:angel3_static/angel3_static.dart';
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import 'package:file/local.dart';
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void main() async {
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var app = Angel()..lazyParseBodies = true;
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var fs = const LocalFileSystem();
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var http = AngelHttp(app);
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app.responseFinalizers.add(inlineAssets(fs.directory('web')));
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app.use(() => throw AngelHttpException.notFound());
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var server = await http.startServer('127.0.0.1', 3000);
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print('Listening at http://${server.address.address}:${server.port}');
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}
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```
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## `inlineAssetsFromVirtualDirectory`
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This function is a simple one; it wraps a `VirtualDirectory` to patch the way it sends `.html` files. Produces the same functionality as `inlineAssets`.
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```dart
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import 'package:angel3_framework/angel3_framework.dart';
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import 'package:angel3_seo/angel3_seo.dart';
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import 'package:angel3_static/angel3_static.dart';
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import 'package:file/local.dart';
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void main() async {
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var app = Angel()..lazyParseBodies = true;
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var fs = const LocalFileSystem();
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var http = AngelHttp(app);
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var vDir = inlineAssets(
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VirtualDirectory(
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app,
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fs,
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source: fs.directory('web'),
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),
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);
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app.use(vDir.handleRequest);
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app.use(() => throw AngelHttpException.notFound());
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var server = await http.startServer('127.0.0.1', 3000);
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print('Listening at http://${server.address.address}:${server.port}');
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}
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```
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