Access nio.com. NIO

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

37/100

10%

LCP (Largest Contentful Paint)

Value42.8 s

0/100

25%

SI (Speed Index)

Value0

0/100

10%

TBT (Total Blocking Time)

Value320 ms

77/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.5 s

58/100

10%

nio.com

293 ms

www.nio.com

360 ms

62b4ca00ee754db9.css

440 ms

a73850a796d3c9da.css

317 ms

6b6c729aaef9cd80.css

338 ms

Our browser made a total of 103 requests to load all elements on the main page. We found that all of those requests were addressed to Nio.com and no external sources were called. The less responsive or slowest element that took the longest time to load (2.5 sec) belongs to the original domain Nio.com.

Content Size

8.9 MB

After Optimization

8.7 MB

In fact, the total size of Nio.com main page is 8.9 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 65% of websites need less resources to load. Images take 8.0 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 118.9 kB

Original 136.7 kB
After minification 136.3 kB
After compression 17.8 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 118.9 kB or 87% of the original size.

Image Optimization

-1%

Potential reduce by 46.6 kB

Original 8.0 MB
After minification 7.9 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. NIO images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 374 B

Original 676.7 kB
After minification 676.7 kB
After compression 676.3 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 122 B

Original 77.8 kB
After minification 77.8 kB
After compression 77.7 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Nio.com has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 97 CSS, Javascripts, AJAX and image requests in order to completely render the main page of NIO. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 27 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

[aria-hidden="true"] elements contain focusable descendents

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

[id] attributes on active, focusable elements are not unique

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Links do not have descriptive text

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

EN
Language Claimed

EN
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Nio.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Nio.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

nio.com

Open Graph description is not detected on the main page of NIO. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks:

Report Summary

Performance

Accessibility

Best Practices

SEO

NIO - Home

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

nio.com

www.nio.com

62b4ca00ee754db9.css

a73850a796d3c9da.css

6b6c729aaef9cd80.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

nio.com

www.nio.com

62b4ca00ee754db9.css

a73850a796d3c9da.css

6b6c729aaef9cd80.css

e42eba74566118ad.css

acf1ea879310baa4.css

adeb7a3d45fdbc98.css

1270ea15b740828f.css

9e8d7484aaf15227.css

polyfills-c67a75d1b6f99dc8.js

webpack-7117f8c700d555ec.js

framework-4ed89e9640adfb9e.js

main-9ac2de808c1d19a9.js

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9118-4d8038796caeb0be.js

index-34cb1e9adfa98588.js

_buildManifest.js

_ssgManifest.js

nio-logo-white.svg

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ET5T.svg

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