hydraline 0.0.4 
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leonidov.devHydraline pure-Dart core: DocumentNode model, single-pass HTML serializer, contextual escaping, SEO metadata, JSON-LD, sitemap/robots and manifests.
hydraline #
Pure-Dart core of Hydraline - the foundation all other packages build on.
What's inside #
| Module | Description |
|---|---|
DocumentNode |
Sealed immutable tree - headings, paragraphs, links, images, tables, islands |
HtmlSerializer |
Single-pass deterministic HTML serializer (buffered + streaming + fragment) |
SafeUrl |
Type-safe URL validation against a scheme allowlist |
SeoMeta |
Open Graph, Twitter Card, hreflang, canonical, meta tags |
JsonLd |
Type-safe JSON-LD builders (Article, Product, FAQ, BreadcrumbList, …) |
Sitemap |
sitemap.xml generation with defaults + auto-split at 50k URLs |
Robots |
robots.txt generation |
RouteManifest |
hydraline.routes.yaml parser + Dart builder |
IslandSpec / IslandStateCodec |
data-state props contract (JSON-safe, ~10 KB budget) |
SsgCollector |
Widget-to-node registration surface |
SeoValidator / Audit |
SEO validation + crawler-view audit |
runAuditCli |
dart run hydraline:audit - page audit + anti-cloaking check |
vanillaIslandsJs |
Level-1 vanilla islands bundle (≤ 8 KB) |
htmxGlueJs |
HTMX bootstrap glue (< 1 KB) |
Rules #
No package:flutter, dart:ui, or dart:html - ever. This package is
pure Dart.
Quick start #
import 'package:hydraline/hydraline.dart';
final root = DocumentRootNode(
head: buildHead(SeoMeta(
title: 'My Page',
description: 'A Hydraline-powered page',
openGraph: OpenGraph(
title: 'My Page',
image: SafeUrl.parse('https://example.com/og.png'),
),
)),
body: [
HeadingNode(level: 1, children: [TextNode('Welcome')]),
ParagraphNode(children: [TextNode('This is real HTML from Dart.')]),
],
);
const serializer = HtmlSerializer();
print(serializer.serialize(root)); // <!DOCTYPE html><html>...
Runnable example: example/main.dart - document
building, streaming, sitemap, robots and validation in one file.
Audit CLI #
dart run hydraline:audit https://example.com # what a crawler sees
dart run hydraline:audit dist/index.html # audit a local file
dart run hydraline:audit --server-integration <url> # anti-cloaking check
Documentation #
- Document Model - full node hierarchy
- Configuration - route manifest, sitemap, SEO
- Security - SafeUrl, escaping, CSP
- Getting Started - prerequisites, examples
License #
MIT - Yevhen Leonidov
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Hydraline pure-Dart core: DocumentNode model, single-pass HTML serializer, contextual escaping, SEO metadata, JSON-LD, sitemap/robots and manifests.
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Topics
#seo #ssr #flutter-web #html #prerender
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unknown (license)