Created
February 2, 2024 03:02
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Flutter SEO
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| import 'package:universal_html/html.dart' as html; | |
| import 'logging.dart'; | |
| void removeViewport() { | |
| final html.Element? existingViewportTag = | |
| html.querySelector('meta[name="viewport"]'); | |
| if (existingViewportTag != null) { | |
| existingViewportTag.remove(); | |
| // Set the viewport meta tag - <meta flt-viewport="" name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=yes"> | |
| final html.Element metaViewportTag = html.Element.tag('meta') | |
| ..setAttribute('flt-viewport', '') | |
| ..setAttribute('name', 'viewport') | |
| ..setAttribute( | |
| 'content', | |
| 'width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=yes', | |
| ); | |
| html.document.head?.append(metaViewportTag); | |
| } else { | |
| logger.w('Viewport meta tag not found'); | |
| } | |
| } | |
| void updatePageTitle(String pageName) { | |
| // Update the page title - Burrows Tools - page, eg. Burrows Tools - Character Counter | |
| if (pageName.isEmpty) { | |
| html.document.title = 'Burrows Tools'; | |
| } else { | |
| html.document.title = 'Burrows Tools - $pageName'; | |
| } | |
| } | |
| void updateCanonicalUrl(String pageUrl) { | |
| final html.Element? existingCanonicalTag = | |
| html.querySelector('link[rel="canonical"]'); | |
| if (existingCanonicalTag != null) { | |
| existingCanonicalTag.remove(); | |
| // Update the canonical meta tag - https://burrows.tools + /page, eg. https://burrows.tools/character-counter | |
| final html.LinkElement canonicalTag = html.LinkElement() | |
| ..setAttribute('rel', 'canonical') | |
| ..setAttribute('href', 'https://burrows.tools$pageUrl'); | |
| html.document.head?.append(canonicalTag); | |
| } else { | |
| logger.w('Canonical meta tag not found'); | |
| } | |
| } |
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