Access josun.cn. 船用空调-风机-船舶暖通系统-海上风电环控系统-江苏兆胜空调有限公司-专业的船用空调系统集成服务供应商

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

59/100

10%

LCP (Largest Contentful Paint)

Value26.0 s

0/100

25%

SI (Speed Index)

Value13.4 s

2/100

10%

TBT (Total Blocking Time)

Value390 ms

69/100

30%

CLS (Cumulative Layout Shift)

Value0.35

31/100

15%

TTI (Time to Interactive)

Value7.2 s

50/100

10%

josun.cn

1500 ms

swiper-bundle.min.css

735 ms

main.css

924 ms

style.css

973 ms

animate.css

753 ms

Our browser made a total of 121 requests to load all elements on the main page. We found that 92% of them (111 requests) were addressed to the original Josun.cn, 2% (3 requests) were made to Api.map.baidu.com and 2% (3 requests) were made to Miao.baidu.com. The less responsive or slowest element that took the longest time to load (20.2 sec) belongs to the original domain Josun.cn.

Content Size

5.2 MB

After Optimization

4.9 MB

In fact, the total size of Josun.cn main page is 5.2 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. 35% of websites need less resources to load. Images take 4.8 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 161.6 kB

Original 184.8 kB
After minification 90.3 kB
After compression 23.1 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. This page needs HTML code to be minified as it can gain 94.4 kB, which is 51% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 161.6 kB or 87% of the original size.

Image Optimization

-2%

Potential reduce by 72.5 kB

Original 4.8 MB
After minification 4.7 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. Josun images are well optimized though.

JavaScript Optimization

-20%

Potential reduce by 34.7 kB

Original 169.4 kB
After minification 169.4 kB
After compression 134.8 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 34.7 kB or 20% of the original size.

CSS Optimization

-42%

Potential reduce by 14.9 kB

Original 35.5 kB
After minification 35.5 kB
After compression 20.7 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. Josun.cn needs all CSS files to be minified and compressed as it can save up to 14.9 kB or 42% of the original size.

Requests Now

118

After Optimization

103

The browser has sent 118 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Josun. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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 the experience of reading tabular or list data using assistive technology, like a screen reader.

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

High

Definition list items are not wrapped in <dl> elements

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

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

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

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

High

Image elements do not have [alt] attributes

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

Language and Encoding

Language Detected

ZH
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Josun.cn can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Josun.cn 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

josun.cn

Open Graph description is not detected on the main page of Josun. 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

船用空调-风机-船舶暖通系统-海上风电环控系统-江苏兆胜空调有限公司-专业的船用空调系统集成服务供应商

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

josun.cn

swiper-bundle.min.css

main.css

style.css

animate.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

josun.cn

swiper-bundle.min.css

main.css

style.css

animate.css

jquery-1.11.0.min.js

jquery-1.12.1.min.js

jquery.SuperSlide.2.1.1.js

swiper-bundle.min.js

getscript

swiper.min.js

wow.min.js

materialMenu.min.js

limit.js

zA7n.js

sear3.png

logo.png

search-icon.png

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ly-i01.png

ly-i02.png

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ly-i04.png

ly-i05.png

ly-i06.png

menu-d01.png

tu-m2.jpg

zz-img.jpg

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