Patterns.dev - SEO Checker

Overview of the SEO Check
Meta information
81% 
Page quality
90% 
Page structure
58% 
Link structure
96% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.09 s
File size
162.40 kB
Words
947
Media files
54
Number of links
60 internal / 2 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Patterns.dev
The page title is too short. (115 pixels of 580 max pixel length) Optimize title
The domain is used in the page's title.
There are no duplicate words in the title
Meta description
(Critically important)
Learn JavaScript design and performance patterns for building more powerful web applications.
The length of the meta description is perfect. (587 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://www.patterns.dev/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
viewportwidth=device-width,initial-scale=1
generatorAstro v2.7.2
robotsmax-snippet:-1, max-image-preview: large, max-video-preview: -1
titlePatterns.dev
descriptionLearn JavaScript design and performance patterns for building more powerful web applications.
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twitter:cardsummary_large_image
twitter:urlhttps://www.patterns.dev/
twitter:titlePatterns.dev
twitter:descriptionLearn JavaScript design and performance patterns for building more powerful web applications.
og:typewebsite
og:urlhttps://www.patterns.dev/
og:titlePatterns.dev
og:descriptionLearn JavaScript design and performance patterns for building more powerful web applications.
og:imagehttps://res.cloudinary.com/ddxwdqwkr/image/upload/c_scale,f_auto,w_1600/v1704232232/patterns.dev/PostPreview_3x.jpg
charsetutf-8

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Page quality

Content
(Critically important)
This page contains 947 words. That's ok.
32% of the text are stop words.
Words from the H1 heading are used in the page content.
The page contains a listing, which indicates a good text layout.
8 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 13.89 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width,initial-scale=1" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 19 tags for this page.
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/_astro/introductiondp_Z7VQea.webpIntroduction to Design Patterns
/_astro/singleton-pattern_Z1aBCos.webpShare a single global instance throughout our application
/_astro/proxy-pattern_Z1xsEjy.webpIntercept and control interactions to target objects
/_astro/prototype-pattern_Z2i64am.webpShare properties among many objects of the same type
/_astro/observer-pattern_Z1PY5pT.webpUse observables to notify subscribers when an event occurs
/_astro/module-pattern_2mDXOL.webpSplit up your code into smaller, reusable pieces
/_astro/mixin-pattern_1nMhqa.webpAdd functionality to objects or classes without inheritance
/_astro/mediator-pattern_211JPr.webpUse a central mediator object to handle communication between components
/_astro/flyweight-pattern_29zCom.webpReuse existing instances when working with identical objects
/_astro/factory-pattern_ZoEc1Q.webpUse a factory function in order to create objects
/_astro/animation_ZNHAtX.webpAn introduction to animating page transitions using the View Transitions API and libraries
/_astro/loading-sequence_13TDi1.webpLearn how to optimize your loading sequence to improve how quickly your app is usable
/_astro/static-import_ZuBewG.webpImport code that has been exported by another module
/_astro/dynamic-import_2sQR0B.webpImport parts of your code on demand
/_astro/import-on-visibility_EfTXh.webpLoad non-critical components when they are visible in the viewport
/_astro/importOnInteraction_o7X3B.webpLoad non-critical resources when a user interacts with UI requiring it
/_astro/routebased-splitting_Z1e2ukq.webpDynamically load components based on the current route
/_astro/bundle-splitting_Z2adF8i.webpSplit your code into small, reusable pieces
/_astro/prpl-2_2bDPz5.webpOptimize initial load through precaching, lazy loading, and minimizing roundtrips
/_astro/treeshaking_ZHBf4p.webpReduce the bundle size by eliminating dead code
/_astro/preload_1y9FBE.webpInform the browser of critical resources before they are discovered
/_astro/prefetch_Z2vDIFz.webpFetch and cache resources that may be requested some time soon
/_astro/thirdParties_Z1fwhsV.webpReduce the performance impact third-party scripts have on your site.
/_astro/listvirtualization_Z2a02XS.webpOptimize list performance with list virtualization
/_astro/javascriptCompression_Z12cbAE.webpReduce the time needed to transfer scripts over the network.
/_astro/overviewReact_Z2gOLYz.webpA UI library for building reusable user interface components
/_astro/overviewOfNext_ZCGmKb.webpVercel's framework for hybrid React applications
/_astro/prescon-pattern_jETmM.webpEnforce separation of concerns by separating the view from the application logic
/_astro/hoc-pattern_1OKBzc.webpPass reusable logic down as props to components throughout your application
/_astro/render-props_ZI4oTy.webpPass JSX elements to components through props
/_astro/hooks-pattern_Z1zz4Vg.webpUse functions to reuse stateful logic among multiple components throughout the app
/_astro/compound-pattern_Zgp9HC.webpCreate multiple components that work together to perform a single task
/_astro/clientSideRendering_2wDAxQ.webpRender your application's UI on the client
/_astro/serverSideRendering_ZCt4YS.webpGenerate HTML to be rendered on the server in response to a user request
/_astro/staticRendering_Tk4qJ.webpDeliver pre-rendered HTML content that was generated when the site was built
.../incrementalStaticGeneration_2nu6pJ.webpUpdate static content after you have built your site
/_astro/progressive-rehydration_1gC0MO.webpDelay loading JavaScript for less important parts of the page
/_astro/ssr-1_Z2fC7Qo.webpGenerate HTML to be rendered on the server in response to a user request
/_astro/reactServerComponents_1qelXJ.webpServer Components compliment SSR, rendering to an intermediate abstraction without needing to add to the JavaScript bundle
/_astro/treeshaking_ZHBf4p.webpWith Next.js, there are several components that can help improve Core Web Vitals metrics
/_astro/introduction_ZpGlbH.webpIntroduction to Vue Patterns
/_astro/components_ZFWaCA.webpSelf-contained modules that couple markup (HTML), logic (JS), and styles (CSS) within them
/_astro/async-components_Z1PFPBC.webpOptimize web app performance by asynchronously loading components.
/_astro/composables_Z1mVkq1.webpFunctions to encapsulate and reuse stateful logic among multiple components
...tro/container-presentational_ZkUhwm.webpEnforce separation of concerns by separating the view from the application logic
/_astro/data-provider-pattern_Z1aSj9x.webpUtilize renderless components for managing and providing data
/_astro/dynamic-components_QgaAR.webpDynamically switch between components with the special <component> element
/_astro/provide-inject_Z2mb5dj.webpHave nested components access data without using props
/_astro/render-functions_sdWuW.webpCreate component templates with programmatic JavaScript
/_astro/renderless-components_25RF8l.webpComponents that don't render their own markup
/_astro/script-setup_Z2oEAoJ.webpCompile-time syntactic sugar for using the Composition API
/_astro/state-management_Z1HYHyI.webpManage application level state between components
/_astro/csb-screenshot_tsFVs.pngCodesandbox
/_astro/progressive-rehydration_ZOJ2OL.jpegFlow chart

Page structure

H1 heading
(Critically important)
Improve how you architect webapps
The H1 heading is perfect.
Headings
(Important)
Some headings occur twice on the page.
There are 59 headings on the page. The amount of headings should be in a more proper relation to the amount of text.

Heading structure

Heading levelContent
H1 Improve how you architect webapps
H2 Introduction
H2 Singleton Pattern
H2 Proxy Pattern
H2 Prototype Pattern
H2 Observer Pattern
H2 Module Pattern
H2 Mixin Pattern
H2 Mediator/Middleware Pattern
H2 Flyweight Pattern
H2 Factory Pattern
H2 Animating View Transitions
H2 Optimize your loading sequence
H2 Static Import
H2 Dynamic Import
H2 Import On Visibility
H2 Import On Interaction
H2 Route Based Splitting
H2 Bundle Splitting
H2 PRPL Pattern
H2 Tree Shaking
H2 Preload
H2 Prefetch
H2 Optimize loading third-parties
H2 List Virtualization
H2 Compressing JavaScript
H2 Overview of React.js
H2 Overview of Next.js
H2 Container/Presentational Pattern
H2 HOC Pattern
H2 Render Props Pattern
H2 Hooks Pattern
H2 Compound Pattern
H2 Client-side Rendering
H2 Server-side Rendering
H2 Static Rendering
H2 Incremental Static Generation
H2 Progressive Hydration
H2 Streaming Server-Side Rendering
H2 React Server Components
H2 Optimize Next.js apps for the Core Web Vitals
H2 Introduction Duplicate text
H2 Components
H2 Async Components
H2 Composables
H2 Container/Presentational Pattern Duplicate text
H2 Data Provider Pattern
H2 Dynamic Components
H2 Provide/Inject
H2 Render functions
H2 Renderless components
H2 <script setup>
H2 State Management
H2 How Patterns.dev works
H2 Practical examples on CodeSandbox
H2 Learn Visually with our animations
H3 Powerful suite of patterns
H3 We offer a modern perspective on patterns
H3 We help you scale your webapps for performance
Some internal link anchor texts are too long.
Some anchor texts are used more than once.
The number of internal links is ok.
All internal links are not using dynamic parameters.
There are 2 external links on this page.
LinkAttributesAnchor text
https://www.patterns.dev/No Text
https://www.patterns.dev/bookBook
https://www.patterns.dev/aboutAbout
https://www.patterns.dev/insightsInsights
/resourcesResources
https://docs.google.com/forms/...New window External Subdomain Feedback
https://www.patterns.dev/Read Online
http://largeapps.dev/New window External Building Large-scale JavaScript Web Apps with React
https://www.patterns.dev/bookDownload eBook or PDF
https://www.patterns.dev/Anchor Read online
https://www.patterns.dev/vanillaIntroduction Introduction to Design Patterns
IMG-ALT Introduction to Design Patterns
/vanilla/singleton-patternSingleton Pattern Share a single global instance throughout our application
IMG-ALT Share a single global instance throughout our application
/vanilla/proxy-patternProxy Pattern Intercept and control interactions to target objects
IMG-ALT Intercept and control interactions to target objects
/vanilla/prototype-patternPrototype Pattern Share properties among many objects of the same type
IMG-ALT Share properties among many objects of the same type
/vanilla/observer-patternObserver Pattern Use observables to notify subscribers when an event occurs
IMG-ALT Use observables to notify subscribers when an event occurs
/vanilla/module-patternModule Pattern Split up your code into smaller, reusable pieces
IMG-ALT Split up your code into smaller, reusable pieces
/vanilla/mixin-patternMixin Pattern Add functionality to objects or classes without inheritance
IMG-ALT Add functionality to objects or classes without inheritance
/vanilla/mediator-patternMediator/Middleware Pattern Use a central mediator object to handle communication between components
IMG-ALT Use a central mediator object to handle communication between components
/vanilla/flyweight-patternFlyweight Pattern Reuse existing instances when working with identical objects
IMG-ALT Reuse existing instances when working with identical objects
/vanilla/factory-patternFactory Pattern Use a factory function in order to create objects
IMG-ALT Use a factory function in order to create objects
/vanilla/view-transitionsAnimating View Transitions An introduction to animating page transitions using the View Transitions API and libraries
IMG-ALT An introduction to animating page transitions using the View Transitions API and libraries
/vanilla/loading-sequenceOptimize your loading sequence Learn how to optimize your loading sequence to improve how quickly your app is usable
IMG-ALT Learn how to optimize your loading sequence to improve how quickly your app is usable
/vanilla/static-importStatic Import Import code that has been exported by another module
IMG-ALT Import code that has been exported by another module
/vanilla/dynamic-importDynamic Import Import parts of your code on demand
IMG-ALT Import parts of your code on demand
/vanilla/import-on-visibilityImport On Visibility Load non-critical components when they are visible in the viewport
IMG-ALT Load non-critical components when they are visible in the viewport
/vanilla/import-on-interactionImport On Interaction Load non-critical resources when a user interacts with UI requiring it
IMG-ALT Load non-critical resources when a user interacts with UI requiring it
/vanilla/route-basedRoute Based Splitting Dynamically load components based on the current route
IMG-ALT Dynamically load components based on the current route
/vanilla/bundle-splittingBundle Splitting Split your code into small, reusable pieces
IMG-ALT Split your code into small, reusable pieces
/vanilla/prplPRPL Pattern Optimize initial load through precaching, lazy loading, and minimizing roundtrips
IMG-ALT Optimize initial load through precaching, lazy loading, and minimizing roundtrips
/vanilla/tree-shakingTree Shaking Reduce the bundle size by eliminating dead code
IMG-ALT Reduce the bundle size by eliminating dead code
/vanilla/preloadPreload Inform the browser of critical resources before they are discovered
IMG-ALT Inform the browser of critical resources before they are discovered
/vanilla/prefetchPrefetch Fetch and cache resources that may be requested some time soon
IMG-ALT Fetch and cache resources that may be requested some time soon
/vanilla/third-partyOptimize loading third-parties Reduce the performance impact third-party scripts have on your site.
IMG-ALT Reduce the performance impact third-party scripts have on your site.
/vanilla/virtual-listsList Virtualization Optimize list performance with list virtualization
IMG-ALT Optimize list performance with list virtualization
/vanilla/compressionCompressing JavaScript Reduce the time needed to transfer scripts over the network.
IMG-ALT Reduce the time needed to transfer scripts over the network.
https://www.patterns.dev/reactOverview of React.js A UI library for building reusable user interface components
IMG-ALT A UI library for building reusable user interface components
/react/nextjsOverview of Next.js Vercel's framework for hybrid React applications
IMG-ALT Vercel's framework for hybrid React applications
/react/presentational-containe...Container/Presentational Pattern Enforce separation of concerns by separating the view from the application logic
IMG-ALT Enforce separation of concerns by separating the view from the application logic
/react/hoc-patternHOC Pattern Pass reusable logic down as props to components throughout your application
IMG-ALT Pass reusable logic down as props to components throughout your application
/react/render-props-patternRender Props Pattern Pass JSX elements to components through props
IMG-ALT Pass JSX elements to components through props
/react/hooks-patternHooks Pattern Use functions to reuse stateful logic among multiple components throughout the app
IMG-ALT Use functions to reuse stateful logic among multiple components throughout the app
/react/compound-patternCompound Pattern Create multiple components that work together to perform a single task
IMG-ALT Create multiple components that work together to perform a single task
/react/client-side-renderingClient-side Rendering Render your application's UI on the client
IMG-ALT Render your application's UI on the client
/react/server-side-renderingServer-side Rendering Generate HTML to be rendered on the server in response to a user request
IMG-ALT Generate HTML to be rendered on the server in response to a user request
/react/static-renderingStatic Rendering Deliver pre-rendered HTML content that was generated when the site was built
IMG-ALT Deliver pre-rendered HTML content that was generated when the site was built
/react/incremental-static-rend...Incremental Static Generation Update static content after you have built your site
IMG-ALT Update static content after you have built your site
/react/progressive-hydrationProgressive Hydration Delay loading JavaScript for less important parts of the page
IMG-ALT Delay loading JavaScript for less important parts of the page
/react/streaming-ssrStreaming Server-Side Rendering Generate HTML to be rendered on the server in response to a user request
IMG-ALT Generate HTML to be rendered on the server in response to a user request
/react/react-server-componentsReact Server Components Server Components compliment SSR, rendering to an intermediate abstraction without needing to add to the JavaScript bundle
IMG-ALT Server Components compliment SSR, rendering to an intermediate abstraction without needing to add to the JavaScript bundle
/react/nextjs-vitalsOptimize Next.js apps for the Core Web Vitals With Next.js, there are several components that can help improve Core Web Vitals metrics
IMG-ALT With Next.js, there are several components that can help improve Core Web Vitals metrics
https://www.patterns.dev/vueIntroduction Introduction to Vue Patterns
IMG-ALT Introduction to Vue Patterns
/vue/componentsComponents Self-contained modules that couple markup (HTML), logic (JS), and styles (CSS) within them
IMG-ALT Self-contained modules that couple markup (HTML), logic (JS), and styles (CSS) within them
/vue/async-componentsAsync Components Optimize web app performance by asynchronously loading components.
IMG-ALT Optimize web app performance by asynchronously loading components.
/vue/composablesComposables Functions to encapsulate and reuse stateful logic among multiple components
IMG-ALT Functions to encapsulate and reuse stateful logic among multiple components
/vue/container-presentationalText duplicate Container/Presentational Pattern Enforce separation of concerns by separating the view from the application logic
IMG-ALT Enforce separation of concerns by separating the view from the application logic
/vue/data-providerData Provider Pattern Utilize renderless components for managing and providing data
IMG-ALT Utilize renderless components for managing and providing data
/vue/dynamic-componentsDynamic Components Dynamically switch between components with the special <component> element
IMG-ALT Dynamically switch between components with the special <component> element
/vue/provide-injectProvide/Inject Have nested components access data without using props
IMG-ALT Have nested components access data without using props
/vue/render-functionsRender functions Create component templates with programmatic JavaScript
IMG-ALT Create component templates with programmatic JavaScript
/vue/renderless-componentsRenderless components Components that don't render their own markup
IMG-ALT Components that don't render their own markup
/vue/script-setup<script setup> Compile-time syntactic sugar for using the Composition API
IMG-ALT Compile-time syntactic sugar for using the Composition API
/vue/state-managementState Management Manage application level state between components
IMG-ALT Manage application level state between components

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.patterns.dev/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time is excellent with 0.09 seconds.
The file size of the HTML document is fine (162 kB).

HTTP Response Header

NameValue
access-control-allow-origin*
age12101083
cache-controlpublic, max-age=0, must-revalidate
content-dispositioninline
content-encodinggzip
content-typetext/html; charset=utf-8
dateFri, 08 Nov 2024 17:11:58 GMT
etagW/"ca4ebdb3c7472a09eee9507b64a7a6c4"
last-modifiedFri, 21 Jun 2024 15:47:14 GMT
serverVercel
strict-transport-securitymax-age=63072000
x-vercel-cacheHIT
x-vercel-idfra1::8dtqp-1731085918136-95bde2bff439
statuscode200
http_versionHTTP/2

External factors

This website has excellent links from other websites.
This page has backlinks from 789 referring domains.
This page has 2,181 backlinks.
This page has backlinks from 478 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Search preview

www.patterns.dev
Patterns.dev
Learn JavaScript design and performance patterns for building more powerful web applications.

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
Patterns84%Check
Web70%Check
Design Patterns70%Check
performance patterns69%Check
Web Performance patterns69%Check
web app68%Check
dev62%Check
Web Apps62%Check
Web Performance62%Check
Vue Patterns62%Check

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