Typescriptlang.org - SEO Checker

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29 typescriptlang.org Last Updated: 9 months

Success 63% of passed verification steps

Warning 7% of total warning

Errors 30% of total errors, require fast action

Mobile

Performance Desktop Score 98%

Best Practices Desktop Score 69%

SEO Desktop Score 90%

Progressive Web App Desktop Score 42%

Performance Mobile Score 91%

Best Practices Mobile Score 69%

SEO Mobile Score 83%

Progressive Web App Mobile Score 44%

Page Authority Authority 0%

Domain Authority Domain Authority 0%

Moz Rank 0.0/10

Bounce Rate Rate 0%

Charset Encoding

Great, language/character encoding is specified: UTF-8

Title Tag 60 Characters

TYPESCRIPT - JAVASCRIPT THAT SCALES.

Meta Description 94 Characters

TypeScript brings you optional static type-checking along with the latest ECMAScript features.

Effective URL 29 Characters

http://www.typescriptlang.org

Excerpt Page content

TypeScript - JavaScript that scales. Skip to main content ...

Meta Keywords 5 Detected

type checker javascript transpiler compiler static types

Google Preview Your look like this in google search result

TYPESCRIPT - JAVASCRIPT THAT SCALES.

http://www.typescriptlang.org

TypeScript brings you optional static type-checking along with the latest ECMAScript features.

Robots.txt File Detected

http://typescriptlang.org/robots.txt

Sitemap.xml File Detected

http://typescriptlang.org/sitemap.xml

Page Size Code & Text Ratio

Document Size: ~12.48 KB

Code Size: ~7.14 KB

Text Size: ~5.34 KB Ratio: 42.78%

Estimation Traffic and Earnings

Only Registered Users

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Desktop

Minimize third-party usage Third-party code blocked the main thread for 0 ms

Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading

Total Blocking Time 10 ms

Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.

JavaScript execution time 0.0 s

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this

Server Backend Latencies 0 ms

Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance

Properly size images Potential savings of 39 KB

Serve images that are appropriately-sized to save cellular data and improve load time

Speed Index 1.1 s

Speed Index shows how quickly the contents of a page are visibly populated

First CPU Idle 0.8 s

First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle).

Avoids enormous network payloads Total size was 659 KB

Large network payloads cost users real money and are highly correlated with long load times

Minimizes main-thread work 0.5 s

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this

First Contentful Paint 0.8 s

First Contentful Paint marks the time at which the first text or image is painted

Includes front-end JavaScript libraries with known security vulnerabilities 8 vulnerabilities detected

Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers

Avoid chaining critical requests 10 chains found

The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load

Avoids an excessive DOM size 429 elements

A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)

Minify JavaScript Potential savings of 12 KB

Minifying JavaScript files can reduce payload sizes and script parse time

First Meaningful Paint 0.8 s

First Meaningful Paint measures when the primary content of a page is visible

Keep request counts low and transfer sizes small 47 requests • 659 KB

To set budgets for the quantity and size of page resources, add a budget.json file

Serve static assets with an efficient cache policy 39 resources found

A long cache lifetime can speed up repeat visits to your page

Max Potential First Input Delay 40 ms

The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task

Time to Interactive 0.9 s

Time to interactive is the amount of time it takes for the page to become fully interactive

Links do not have descriptive text 1 link found

Descriptive link text helps search engines understand your content

Network Round Trip Times 0 ms

Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance

Estimated Input Latency 10 ms

Estimated Input Latency is an estimate of how long your app takes to respond to user input, in milliseconds, during the busiest 5s window of page load. If your latency is higher than 50 ms, users may perceive your app as laggy

Minify CSS Potential savings of 6 KB

Minifying CSS files can reduce network payload sizes

Remove unused CSS Potential savings of 33 KB

Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity

Serve images in next-gen formats Potential savings of 154 KB

Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption

Does not use HTTPS 39 insecure requests found

All sites should be protected with HTTPS, even ones that don't handle sensitive data. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs

Server response times are low (TTFB) Root document took 250 ms

Time To First Byte identifies the time at which your server sends a response

Eliminate render-blocking resources Potential savings of 390 ms

Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles

Efficiently encode images Potential savings of 7 KB

Optimized images load faster and consume less cellular data

Mobile

Serve static assets with an efficient cache policy 39 resources found

A long cache lifetime can speed up repeat visits to your page

Max Potential First Input Delay 220 ms

The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task

Time to Interactive 3.4 s

Time to interactive is the amount of time it takes for the page to become fully interactive

Links do not have descriptive text 1 link found

Descriptive link text helps search engines understand your content

Network Round Trip Times 0 ms

Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance

Estimated Input Latency 10 ms

First Contentful Paint (3G) 5325 ms

First Contentful Paint 3G marks the time at which the first text or image is painted while on a 3G network

Minify CSS Potential savings of 6 KB

Minifying CSS files can reduce network payload sizes

Tap targets are sized appropriately 100% appropriately sized tap targets

Interactive elements like buttons and links should be large enough (48x48px), and have enough space around them, to be easy enough to tap without overlapping onto other elements

Document doesn't use legible font sizes 36.07% legible text

Font sizes less than 12px are too small to be legible and require mobile visitors to “pinch to zoom” in order to read. Strive to have >60% of page text ≥12px

Remove unused CSS Potential savings of 33 KB

Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity

Serve images in next-gen formats Potential savings of 154 KB

Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption

Does not use HTTPS 39 insecure requests found

Server response times are low (TTFB) Root document took 90 ms

Time To First Byte identifies the time at which your server sends a response

Eliminate render-blocking resources Potential savings of 1,350 ms

Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles

Efficiently encode images Potential savings of 7 KB

Optimized images load faster and consume less cellular data

Minimize third-party usage Third-party code blocked the main thread for 0 ms

Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading

Total Blocking Time 130 ms

Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.

JavaScript execution time 0.4 s

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this

Server Backend Latencies 0 ms

Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance

Defer offscreen images Potential savings of 3 KB

Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive

Speed Index 2.7 s

Speed Index shows how quickly the contents of a page are visibly populated

First CPU Idle 3.0 s

First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle).

Avoids enormous network payloads Total size was 659 KB

Large network payloads cost users real money and are highly correlated with long load times

Minimizes main-thread work 1.6 s

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this

First Contentful Paint 2.7 s

First Contentful Paint marks the time at which the first text or image is painted

Includes front-end JavaScript libraries with known security vulnerabilities 8 vulnerabilities detected

Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers

Avoid chaining critical requests 10 chains found

Avoids an excessive DOM size 429 elements

Minify JavaScript Potential savings of 12 KB

Minifying JavaScript files can reduce payload sizes and script parse time

First Meaningful Paint 2.8 s

First Meaningful Paint measures when the primary content of a page is visible

Keep request counts low and transfer sizes small 47 requests • 659 KB

To set budgets for the quantity and size of page resources, add a budget.json file

Speed And Optimization Tips

Only Registered Users

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Alexa Rank

0

Local Rank: / Users: / PageViews:

Global Rank

Information Server

Response Header HTTP headers carry information about the client browser, the requested page and the server

HTTP/1.1 200 OK
Content-Length: 9428
Content-Type: text/html
Content-Encoding: gzip
Last-Modified: Fri, 06 Dec 2019 18:29:39 GMT
Accept-Ranges: bytes
ETag: "80ab741e63acd51:0"
Vary: Accept-Encoding
Server: Microsoft-IIS/10.0
X-Powered-By: ASP.NET
Set-Cookie: ARRAffinity=196b017bcc44a9048dbe4c2e0caabbe8f86a914abd919dd639d5e9228656f1a4;Path=/;HttpOnly;Domain=www.typescriptlang.org
Date: Thu, 19 Dec 2019 11:33:45 GMT

DNS Records DNS Resource Records associated with a hostname

View DNS Records

Type	Name	Value	Class	TTL
A	typescriptlang.org	104.215.95.187	IN	3561
A	typescriptlang.org	52.164.206.56	IN	3561
NS	typescriptlang.org	ns4.msft.net	IN	7189
NS	typescriptlang.org	ns3.msft.net	IN	7189
NS	typescriptlang.org	ns1.msft.net	IN	7189
NS	typescriptlang.org	ns2.msft.net	IN	7189

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29 typescriptlang.org Last Updated: 9 months

Desktop

Mobile

Estimation Traffic and Earnings

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Desktop

Mobile

Speed And Optimization Tips

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Alexa Rank

0

Information Server

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