dfrobot.com.cn Website Information
Daily Unique Visits: 3,797
Daily Page Views: 15,188
Income Per Day: $43
Estimated Value: $23,220
This website is located in China and is using following IP address 212.64.26.74. See the complete list of popular websites hosted in China.
dfrobot.com.cn is registered under .CN top-level domain. Please check other sites in .CN zone.
Website dfrobot.com.cn is using the following name servers:
- dns16.hichina.com
- dns15.hichina.com
and is probably hosted by CNNIC-TENCENT-NET-AP Shenzhen Tencent Computer Systems Company Limited, CN. See the full list of other websites hosted by CNNIC-TENCENT-NET-AP Shenzhen Tencent Computer Systems Company Limited, CN.
The highest website dfrobot.com.cn position in Alexa rank database was 3320 and the lowest rank position was 996338. Current position of dfrobot.com.cn in Alexa rank database is 330518.
Desktop speed score of dfrobot.com.cn (28/100) is better than the results of 7.4% of other sites and shows that the page desktop performance can be improved.
Mobile usability score of dfrobot.com.cn (99/100) is better than the results of 79.46% of other sites and means that the page is mobile-friendly.
Mobile speed score of dfrobot.com.cn (40/100) is better than the results of 18.97% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
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dfrobot.com.cn Alexa Rank
The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.
dfrobot.com.cn whois
WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.
Domain Name: dfrobot.com.cn
ROID: 20100318s10011s88110063-cn
Domain Status: ok
Registrant: 上海智位机器人股份有限公司
Registrant Contact Email: ricky.ye@dfrobot.com
Sponsoring Registrar: 阿里云计算有限公司（万网）
Name Server: vip3.alidns.com
Name Server: vip4.alidns.com
Registration Time: 2010-03-18 19:18:50
Expiration Time: 2025-03-18 19:18:50
DNSSEC: unsigned
ROID: 20100318s10011s88110063-cn
Domain Status: ok
Registrant: 上海智位机器人股份有限公司
Registrant Contact Email: ricky.ye@dfrobot.com
Sponsoring Registrar: 阿里云计算有限公司（万网）
Name Server: vip3.alidns.com
Name Server: vip4.alidns.com
Registration Time: 2010-03-18 19:18:50
Expiration Time: 2025-03-18 19:18:50
DNSSEC: unsigned
dfrobot.com.cn server information
Servers Location
dfrobot.com.cn desktop page speed rank
Last tested: 2018-12-10
Desktop Speed
Bad
28/100
dfrobot.com.cn Desktop Speed Test Quick Summary
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priority - 41Leverage browser caching
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https://www.googletagmanager.com/gtag/js?id=UA-33344788-1 (15 minutes)
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https://www.google-analytics.com/analytics.js (2 hours)
priority - 17Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 169.2KiB (68% reduction).
Compressing http://mc.dfrobot.com.cn/template/zhanzhuai_v/imag…s/jquery-1.12.1.min.js could save 61.8KiB (65% reduction).
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priority - 3Avoid landing page redirects
Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
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http://mc.dfrobot.com.cn/portal.php
priority - 2Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking CSS resources. This causes a delay in rendering your page.
Optimize CSS Delivery of the following:
http://mc.dfrobot.com.cn/data/cache/style_23_common.css?kBq
priority - 1Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 13.9KiB (30% reduction).
Minifying http://mc.dfrobot.com.cn/template/zhanzhuai_v/images/js/jPages.js could save 5.9KiB (32% reduction).
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Minifying http://mc.dfrobot.com.cn/template/zhanzhuai_v/images/js/index.js could save 1.3KiB (23% reduction).
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Minifying http://mc.dfrobot.com.cn/template/zhanzhuai_v/images/js/zhanzhuai-common.js could save 396B (21% reduction).
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priority - 0Minify CSS
Compacting CSS code can save many bytes of data and speed up download and parse times.
Minify CSS for the following resources to reduce their size by 943B (40% reduction).
Minifying http://mc.dfrobot.com.cn/template/zhanzhuai_v/font/demo.css could save 943B (40% reduction) after compression.
dfrobot.com.cn Desktop Resource Breakdown
| Total Resources | 105 |
| Number of Hosts | 11 |
| Static Resources | 83 |
| JavaScript Resources | 17 |
| CSS Resources | 5 |
dfrobot.com.cn mobile page speed rank
Last tested: 2018-12-10
Mobile Speed
Bad
40/100
dfrobot.com.cn Mobile Speed Test Quick Summary
priority - 56Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 551.6KiB (54% reduction).
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Compressing http://mc.dfrobot.com.cn/uc_server/data/avatar/000…15/20_avatar_small.jpg could save 462B (30% reduction).
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Compressing http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/images/essence_2.jpg could save 9.7KiB (51% reduction).
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Compressing http://mc.dfrobot.com.cn/data/attachment/forum/201…41ua778lf3h8236qq7.jpg could save 2.5KiB (17% reduction).
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priority - 40Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 7 blocking script resources and 2 blocking CSS resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
http://mc.dfrobot.com.cn/template/iscwo_touch/iscw…ry/jquery-2.1.1.min.js
http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/iscroll/iscroll.js
http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/hammer/hammer.min.js
http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/common.js
http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/index.js
https://www.googletagmanager.com/gtag/js?id=UA-33344788-1
http://tajs.qq.com/stats?sId=11346859
http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/iscroll/iscroll.js
http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/hammer/hammer.min.js
http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/common.js
http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/index.js
https://www.googletagmanager.com/gtag/js?id=UA-33344788-1
http://tajs.qq.com/stats?sId=11346859
Optimize CSS Delivery of the following:
http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/font/iconfont.css
http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/css/appstyle.css
http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/css/appstyle.css
priority - 27Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
http://mc.dfrobot.com.cn/data/attachment/forum/201…06uvpcmyt3pz6zkakv.png (expiration not specified)
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priority - 19Avoid landing page redirects
Your page has 3 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
http://dfrobot.com.cn/
http://mc.dfrobot.com.cn/
http://mc.dfrobot.com.cn/portal.php
http://mc.dfrobot.com.cn/forum.php?mobile=yes
http://mc.dfrobot.com.cn/
http://mc.dfrobot.com.cn/portal.php
http://mc.dfrobot.com.cn/forum.php?mobile=yes
priority - 13Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 128.5KiB (69% reduction).
Compressing http://mc.dfrobot.com.cn/template/iscwo_touch/iscw…ry/jquery-2.1.1.min.js could save 53.5KiB (64% reduction).
Compressing http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/iscroll/iscroll.js could save 40.6KiB (77% reduction).
Compressing http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/common.js could save 20.6KiB (73% reduction).
Compressing http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/hammer/hammer.min.js could save 13.1KiB (64% reduction).
Compressing http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/index.js could save 758B (56% reduction).
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Compressing http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/index.js could save 758B (56% reduction).
priority - 8Prioritize visible content
Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.
The entire HTML response was not sufficient to render the above-the-fold content. This usually indicates that additional resources, loaded after HTML parsing, were required to render above-the-fold content. Prioritize visible content that is needed for rendering above-the-fold by including it directly in the HTML response.
Only about 46% of the final above-the-fold content could be rendered with the full HTML response.
Click to see the screenshot with only the HTML response:
priority - 2Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 20.9KiB (26% reduction).
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Minifying http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/index.js could save 303B (23% reduction).
Minifying http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/common.js could save 7.1KiB (26% reduction).
Minifying http://mc.dfrobot.com.cn/template/iscwo_touch/iscwo/js/index.js could save 303B (23% reduction).
dfrobot.com.cn Mobile Resource Breakdown
| Total Resources | 55 |
| Number of Hosts | 11 |
| Static Resources | 36 |
| JavaScript Resources | 11 |
| CSS Resources | 2 |
dfrobot.com.cn mobile page usability
Last tested: 2018-12-10
Mobile Usability
Good
99/100
dfrobot.com.cn Mobile Usability Test Quick Summary
priority - 0Size tap targets appropriately
Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target
<a href="forum.php?mod=…page=micro_bit">Micro:bit学习精华</a> is close to 1 other tap targets.dfrobot.com.cn HTML validation
Errors
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Line: 1 Column: 1 - 121
"...<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html..."
"...<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html..."
Bad value “MSThemeCompatible” for attribute “http-equiv” on element “meta”.
Line: 13 Column: 1 - 53
"..."True" /> <meta http-equiv="MSThemeCompatible" content="Yes" /> <base..."
"..."True" /> <meta http-equiv="MSThemeCompatible" content="Yes" /> <base..."
No space between attributes.
Line: 58 Column: - 95
"...ction=login')"class="xi2"><str..."
"...ction=login')"class="xi2"><str..."
Attribute “x-webkit-speech” not allowed on element “input” at this point.
Line: 77 Column: 1 - 109
"..._txt_td"> <input type="text" name="srchtxt" id="scbar_txt" value="请输入搜索内容" autocomplete="off" x-webkit-speech speech /> </div..."
"..._txt_td"> <input type="text" name="srchtxt" id="scbar_txt" value="请输入搜索内容" autocomplete="off" x-webkit-speech speech /> </div..."
Attribute “speech” not allowed on element “input” at this point.
Line: 77 Column: 1 - 109
"..._txt_td"> <input type="text" name="srchtxt" id="scbar_txt" value="请输入搜索内容" autocomplete="off" x-webkit-speech speech /> </div..."
"..._txt_td"> <input type="text" name="srchtxt" id="scbar_txt" value="请输入搜索内容" autocomplete="off" x-webkit-speech speech /> </div..."
Attribute “hidefocus” not allowed on element “a” at this point.
Line: 80 Column: 1 - 106
"...type_td"> <a href="javascript:;" id="scbar_type" class="zhanzhuai_xg1" onclick="showMenu(this.id)" hidefocus="true">搜索</a>..." Line: 96 Column: 37 - 91
"..._portal" ><a href="portal.php" hidefocus="true" title="Portal" >首页<spa..." Line: 97 Column: 29 - 109
"...n_N17f4" ><a href="http://www.dfrobot.com.cn/index.php" hidefocus="true" target="_blank" >商城</a>..." Line: 98 Column: 29 - 79
"...n_forum" ><a href="forum.php" hidefocus="true" title="BBS" >论坛<spa..." Line: 99 Column: 29 - 100
"...n_Nb476" ><a href="http://wiki.dfrobot.com.cn" hidefocus="true" target="_blank" >产品资料库<..."
"...type_td"> <a href="javascript:;" id="scbar_type" class="zhanzhuai_xg1" onclick="showMenu(this.id)" hidefocus="true">搜索</a>..." Line: 96 Column: 37 - 91
"..._portal" ><a href="portal.php" hidefocus="true" title="Portal" >首页<spa..." Line: 97 Column: 29 - 109
"...n_N17f4" ><a href="http://www.dfrobot.com.cn/index.php" hidefocus="true" target="_blank" >商城</a>..." Line: 98 Column: 29 - 79
"...n_forum" ><a href="forum.php" hidefocus="true" title="BBS" >论坛<spa..." Line: 99 Column: 29 - 100
"...n_Nb476" ><a href="http://wiki.dfrobot.com.cn" hidefocus="true" target="_blank" >产品资料库<..."
Attribute “sc” not allowed on element “button” at this point.
Line: 83 Column: 1 - 92
"..._btn_td"> <button type="submit" name="searchsubmit" id="scbar_btn" sc="1" class="pn pnc" value="true"><i cla..."
"..._btn_td"> <button type="submit" name="searchsubmit" id="scbar_btn" sc="1" class="pn pnc" value="true"><i cla..."
Bad value “article” for attribute “rel” on element “a”: The string “article” is not a registered keyword.
Line: 88 Column: 67 - 103
"...one;"><li><a href="javascript:;" rel="article">文章</a>..."
"...one;"><li><a href="javascript:;" rel="article">文章</a>..."
Bad value “forum” for attribute “rel” on element “a”: The string “forum” is not a registered keyword.
Line: 88 Column: 119 - 169
"...></li><li><a href="javascript:;" rel="forum" class="curtype">帖子</a>..."
"...></li><li><a href="javascript:;" rel="forum" class="curtype">帖子</a>..."
Bad value “user” for attribute “rel” on element “a”: The string “user” is not a registered keyword.
Line: 88 Column: 185 - 218
"...></li><li><a href="javascript:;" rel="user">用户</a>..."
"...></li><li><a href="javascript:;" rel="user">用户</a>..."
Duplicate attribute “type”.
Line: 131 Column: - 107
"...avascript" type="text/javascri..."
"...avascript" type="text/javascri..."
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Line: 136 Column: 1 - 38
".../script> <style id="diy_style" type="text/css">#frame..."
".../script> <style id="diy_style" type="text/css">#frame..."
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Line: 145 Column: 4 - 103
"...lank"> <img src="data/attachment/block/77/77c2068ff8d4806f471f46666777d995.jpg" width="835" height="400" /> </a..." Line: 153 Column: 4 - 103
"...lank"> <img src="data/attachment/block/b7/b79843374fbaa451c8248efa6159454b.jpg" width="835" height="400" /> </a..." Line: 161 Column: 4 - 103
"...lank"> <img src="data/attachment/block/72/724d0f56410fe4a3be749f809715e232.jpg" width="835" height="400" /> </a..." Line: 169 Column: 4 - 103
"...lank"> <img src="data/attachment/block/26/2659aed2c94363a69620cbb54f806332.jpg" width="835" height="400" /> </a..." Line: 177 Column: 4 - 103
"...lank"> <img src="data/attachment/block/f0/f004dfc96efd64b99e1d9c32a660b5e6.jpg" width="835" height="400" /> </a..."
"...lank"> <img src="data/attachment/block/77/77c2068ff8d4806f471f46666777d995.jpg" width="835" height="400" /> </a..." Line: 153 Column: 4 - 103
"...lank"> <img src="data/attachment/block/b7/b79843374fbaa451c8248efa6159454b.jpg" width="835" height="400" /> </a..." Line: 161 Column: 4 - 103
"...lank"> <img src="data/attachment/block/72/724d0f56410fe4a3be749f809715e232.jpg" width="835" height="400" /> </a..." Line: 169 Column: 4 - 103
"...lank"> <img src="data/attachment/block/26/2659aed2c94363a69620cbb54f806332.jpg" width="835" height="400" /> </a..." Line: 177 Column: 4 - 103
"...lank"> <img src="data/attachment/block/f0/f004dfc96efd64b99e1d9c32a660b5e6.jpg" width="835" height="400" /> </a..."
Bad value “http://wpa.qq.com/msgrd?V=3&uin=&Site=DF创客社区 - 分享创造的喜悦&Menu=yes&from=discuz” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Line: 1225 Column: 33 - 191
"...uu_wmaps"><a href="http://wpa.qq.com/msgrd?V=3&uin=&Site=DF创客社区 - 分享创造的喜悦&Menu=yes&from=discuz" class="zhanzhuai_moquu_wmaps" target="_blank" title="QQ"><img s..."
"...uu_wmaps"><a href="http://wpa.qq.com/msgrd?V=3&uin=&Site=DF创客社区 - 分享创造的喜悦&Menu=yes&from=discuz" class="zhanzhuai_moquu_wmaps" target="_blank" title="QQ"><img s..."
Warnings
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Line: 28 Column: 9 - 61
"...> <script language="javascript" type="text/javascript"> ..."
"...> <script language="javascript" type="text/javascript"> ..."
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Line: 64 Column: 39 - 122
"... 分享创造的喜悦"><img src="template/zhanzhuai_v/images/logo.png" alt="DF创客社区 - 分享创造的喜悦" border="0" /></a></..."
"... 分享创造的喜悦"><img src="template/zhanzhuai_v/images/logo.png" alt="DF创客社区 - 分享创造的喜悦" border="0" /></a></..."
This document appears to be written in Simplified Chinese. Consider adding “lang="zh-hans"” (or variant) to the “html” start tag.
Line: 2 Column: 122 - 43
"...onal.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head..."
"...onal.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head..."
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dfrobot.com.cn Ping
Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.
dfrobot.com.cn TRACEROUTE
Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.