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class="pkg-page-title-copy-icon filter-invert-on-dark" src="/static/hash-o6oemknr/img/content-copy-icon.svg" alt="copy "flutter_lints: ^5.0.0" to clipboard" width="18" height="18" title="Copy "flutter_lints: ^5.0.0" to clipboard" data-copy-content="flutter_lints: ^5.0.0" data-ga-click-event="copy-package-version"/><div class="pkg-page-title-copy-feedback"><span class="code">flutter_lints: ^5.0.0</span> copied to clipboard</div></span></h1><div class="metadata">Published <span><a class="-x-ago" href="" title="Sep 25, 2024" aria-label="2 months ago" aria-role="button" role="button" data-timestamp="1727296118541">2 months ago</a></span> • <a class="-pub-publisher" href="/publishers/flutter.dev"><img class="-pub-publisher-shield filter-invert-on-dark" src="/static/hash-o6oemknr/img/material-icon-verified.svg" alt="verified publisher" width="14" height="14" title="Published by a pub.dev verified publisher"/>flutter.dev</a><span class="package-badge" title="Package is compatible with Dart 3.">Dart 3 compatible</span></div><div class="detail-tags-and-like"><div class="detail-tags"><div class="-pub-tag-badge"><span class="tag-badge-main">SDK</span><a class="tag-badge-sub" href="/packages?q=sdk%3Adart" rel="nofollow" title="Packages compatible with Dart SDK">Dart</a><a class="tag-badge-sub" href="/packages?q=sdk%3Aflutter" rel="nofollow" title="Packages compatible with Flutter SDK">Flutter</a></div><div class="-pub-tag-badge"><span class="tag-badge-main">Platform</span><a class="tag-badge-sub" href="/packages?q=platform%3Aandroid" rel="nofollow" title="Packages compatible with Android platform">Android</a><a class="tag-badge-sub" href="/packages?q=platform%3Aios" rel="nofollow" title="Packages compatible with iOS platform">iOS</a><a class="tag-badge-sub" href="/packages?q=platform%3Alinux" rel="nofollow" title="Packages compatible with Linux platform">Linux</a><a class="tag-badge-sub" href="/packages?q=platform%3Amacos" rel="nofollow" title="Packages compatible with macOS 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class="detail-metadata-toggle-icon">→</div><h3 class="detail-lead-title">Metadata</h3></div><p class="detail-lead-text">Recommended lints for Flutter apps, packages, and plugins to encourage good coding practices.</p><p class="detail-lead-more"><a class="detail-metadata-toggle">More...</a></p></div></div><div class="detail-body"><div class="detail-tabs"><div class="detail-tabs-wide-header"><div class="detail-container"><ul class="detail-tabs-header"><li class="detail-tab tab-button detail-tab-readme-title -active">Readme</li><li class="detail-tab tab-link detail-tab-changelog-title"><a href="/packages/flutter_lints/changelog" role="button">Changelog</a></li><li class="detail-tab tab-link detail-tab-example-title"><a href="/packages/flutter_lints/example" role="button">Example</a></li><li class="detail-tab tab-link detail-tab-installing-title"><a href="/packages/flutter_lints/install" role="button">Installing</a></li><li class="detail-tab tab-link detail-tab-versions-title"><a href="/packages/flutter_lints/versions" role="button">Versions</a></li><li class="detail-tab tab-link detail-tab-analysis-title"><a href="/packages/flutter_lints/score" role="button">Scores</a></li></ul></div></div><div class="detail-container detail-body-main"><div class="detail-tabs-content"><section class="tab-content detail-tab-readme-content -active markdown-body"><p><a href="https://pub.dev/packages/flutter_lints"><img src="https://img.shields.io/pub/v/flutter_lints.svg" alt="pub package"></a></p> <p>This package contains a recommended set of lints for <a href="https://flutter.dev">Flutter</a> apps, packages, and plugins to encourage good coding practices.</p> <p>This package is built on top of Dart's <code>recommended.yaml</code> set of lints from <a href="https://pub.dev/packages/lints">package:lints</a>.</p> <p>Lints are surfaced by the <a href="https://dart.dev/tools/analysis">dart analyzer</a>, which statically checks dart code. <a href="https://dart.dev/tools#ides-and-editors">Dart-enabled IDEs</a> typically present the issues identified by the analyzer in their UI. Alternatively, the analyzer can be invoked manually by running <code>flutter analyze</code>.</p> <h2 class="hash-header" id="usage">Usage <a href="#usage" class="hash-link">#</a></h2> <p>Flutter apps, packages, and plugins created with <code>flutter create</code> starting with Flutter version 2.3.0 are already set up to use the lints defined in this package. Entities created before that version can use these lints by following these instructions:</p> <ol> <li>Depend on this package as a <strong>dev_dependency</strong> by running <code>flutter pub add dev:flutter_lints</code>.</li> <li>Create an <code>analysis_options.yaml</code> file at the root of the package (alongside the <code>pubspec.yaml</code> file) and <code>include: package:flutter_lints/flutter.yaml</code> from it.</li> </ol> <p>Example <code>analysis_options.yaml</code> file:</p> <pre><code class="language-yaml"># This file configures the analyzer, which statically analyzes Dart code to # check for errors, warnings, and lints. # # The issues identified by the analyzer are surfaced in the UI of Dart-enabled # IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be # invoked from the command line by running `flutter analyze`. # The following line activates a set of recommended lints for Flutter apps, # packages, and plugins designed to encourage good coding practices. include: package:flutter_lints/flutter.yaml linter: # The lint rules applied to this project can be customized in the # section below to disable rules from the `package:flutter_lints/flutter.yaml` # included above or to enable additional rules. A list of all available lints # and their documentation is published at https://dart.dev/tools/linter-rules. # # Instead of disabling a lint rule for the entire project in the # section below, it can also be suppressed for a single line of code # or a specific dart file by using the `// ignore: name_of_lint` and # `// ignore_for_file: name_of_lint` syntax on the line or in the file # producing the lint. rules: # avoid_print: false # Uncomment to disable the `avoid_print` rule # prefer_single_quotes: true # Uncomment to enable the `prefer_single_quotes` rule # Additional information about this file can be found at # https://dart.dev/tools/analysis </code></pre> <h2 class="hash-header" id="adding-new-lints">Adding new lints <a href="#adding-new-lints" class="hash-link">#</a></h2> <p>Please file a <a href="https://github.com/dart-lang/lints/issues/new?&labels=type-lint&template=lint-propoposal.md" rel="ugc">lint proposal</a> issue to suggest that an existing lint rule should be added to this package. The benefits and risks of adding a lint should be discussed on that issue with all stakeholders involved. The suggestions will be reviewed periodically (typically once a year). Following a review, the package will be updated with all lints that made the cut.</p> <p>Adding a lint to the package may create new warnings for existing users and is therefore considered to be a breaking change, which will require a major version bump. To keep churn low, lints are not added one-by-one, but in one batch following a review of all accumulated suggestions since the previous review.</p> </section></div></div></div><aside class="detail-info-box"><a class="packages-scores" href="/packages/flutter_lints/score"><div class="packages-score packages-score-like"><div class="packages-score-value -has-value"><span class="packages-score-value-number">1186</span><span class="packages-score-value-sign"></span></div><div class="packages-score-label">likes</div></div><div class="packages-score packages-score-health"><div class="packages-score-value -has-value"><span class="packages-score-value-number">160</span><span class="packages-score-value-sign"></span></div><div class="packages-score-label">pub points</div></div><div class="packages-score packages-score-popularity"><div class="packages-score-value -has-value"><span class="packages-score-value-number">100</span><span class="packages-score-value-sign">%</span></div><div class="packages-score-label">popularity</div></div></a><h3 class="title">Publisher</h3><p><a href="/publishers/flutter.dev"><img class="-pub-publisher-shield filter-invert-on-dark" src="/static/hash-o6oemknr/img/material-icon-verified.svg" alt="verified publisher" width="14" height="14" title="Published by a pub.dev verified publisher"/>flutter.dev</a></p><h3 class="title pkg-infobox-metadata">Metadata</h3><p>Recommended lints for Flutter apps, packages, and plugins to encourage good coding practices.</p><p><a class="link" href="https://github.com/flutter/packages/tree/main/packages/flutter_lints" rel="ugc">Repository (GitHub)</a><br/><a class="link" href="https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+flutter_lints%22" rel="ugc">View/report issues</a><br/><a class="link" href="https://github.com/flutter/packages/blob/main/CONTRIBUTING.md" rel="ugc">Contributing</a><br/></p><h3 class="title">Topics</h3><p><a href="/packages?q=topic%3Alints" rel="nofollow">#lints</a></p><h3 class="title">Documentation</h3><p><a class="link" href="/documentation/flutter_lints/latest/">API reference</a><br/></p><h3 class="title">License</h3><p><img class="inline-icon-img filter-invert-on-dark" src="/static/hash-o6oemknr/img/material-icon-balance.svg" alt="" width="14" height="14" role="presentation"/>BSD-3-Clause (<a href="/packages/flutter_lints/license">license</a>)</p><h3 class="title">Dependencies</h3><p><a href="/packages/lints" title="^5.0.0">lints</a></p><h3 class="title">More</h3><p><a href="/packages?q=dependency%3Aflutter_lints" rel="nofollow">Packages that depend on flutter_lints</a></p></aside></div><script type="application/ld+json">{"@context":"http\u003a\u002f\u002fschema.org","@type":"SoftwareSourceCode","name":"flutter\u005flints","version":"5.0.0","description":"flutter\u005flints - Recommended lints for Flutter apps, packages, and plugins to encourage good coding practices.","url":"https\u003a\u002f\u002fpub.dev\u002fpackages\u002fflutter\u005flints","dateCreated":"2021-05-05T19\u003a49\u003a34.894690Z","dateModified":"2024-09-25T20\u003a28\u003a38.541068Z","programmingLanguage":"Dart","image":"https\u003a\u002f\u002fpub.dev\u002fstatic\u002fimg\u002fpub-dev-icon-cover-image.png","license":"https\u003a\u002f\u002fpub.dev\u002fpackages\u002fflutter\u005flints\u002flicense"}</script></div><div class="detail-metadata"><h3 class="detail-metadata-title"><span class="detail-metadata-toggle">←</span> Metadata</h3><div class="detail-info-box"><a class="packages-scores" href="/packages/flutter_lints/score"><div class="packages-score packages-score-like"><div class="packages-score-value -has-value"><span class="packages-score-value-number">1186</span><span class="packages-score-value-sign"></span></div><div class="packages-score-label">likes</div></div><div class="packages-score packages-score-health"><div class="packages-score-value -has-value"><span class="packages-score-value-number">160</span><span class="packages-score-value-sign"></span></div><div class="packages-score-label">pub points</div></div><div class="packages-score packages-score-popularity"><div class="packages-score-value -has-value"><span class="packages-score-value-number">100</span><span class="packages-score-value-sign">%</span></div><div class="packages-score-label">popularity</div></div></a><h3 class="title">Publisher</h3><p><a href="/publishers/flutter.dev"><img class="-pub-publisher-shield filter-invert-on-dark" src="/static/hash-o6oemknr/img/material-icon-verified.svg" alt="verified publisher" width="14" height="14" title="Published by a pub.dev verified publisher"/>flutter.dev</a></p><h3 class="title pkg-infobox-metadata">Metadata</h3><p>Recommended lints for Flutter apps, packages, and plugins to encourage good coding practices.</p><p><a class="link" href="https://github.com/flutter/packages/tree/main/packages/flutter_lints" rel="ugc">Repository (GitHub)</a><br/><a class="link" href="https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+flutter_lints%22" rel="ugc">View/report issues</a><br/><a class="link" href="https://github.com/flutter/packages/blob/main/CONTRIBUTING.md" rel="ugc">Contributing</a><br/></p><h3 class="title">Topics</h3><p><a href="/packages?q=topic%3Alints" rel="nofollow">#lints</a></p><h3 class="title">Documentation</h3><p><a class="link" href="/documentation/flutter_lints/latest/">API reference</a><br/></p><h3 class="title">License</h3><p><img class="inline-icon-img filter-invert-on-dark" src="/static/hash-o6oemknr/img/material-icon-balance.svg" alt="" width="14" height="14" role="presentation"/>BSD-3-Clause (<a href="/packages/flutter_lints/license">license</a>)</p><h3 class="title">Dependencies</h3><p><a href="/packages/lints" title="^5.0.0">lints</a></p><h3 class="title">More</h3><p><a href="/packages?q=dependency%3Aflutter_lints" rel="nofollow">Packages that depend on 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