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❌ 5 criteria to solve
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菜鸟教程 - 学的不仅是技术，更是梦想！
http://runoob.com
菜鸟教程(www.runoob.com)提供了编程的基础技术教程, 介绍了HTML、CSS、Javascript、Python，Java，Ruby，C，PHP , MySQL等各种编程语言的基础知识。 同时本站中也提供了大量的在线实例，通过实例，您可以更好的学习编程。..
http://runoob.com
菜鸟教程 - 学的不仅是技术，更是梦想！
菜鸟教程(www.runoob.com)提供了编程的基础技术教程, 介绍了HTML、CSS、Javascript、Python，Java，Ruby，C，PHP , MySQL等各种编程语言的基础知识。 同时本站中也提供了大量的在线实例，通过实例，您可以更好的学...
No 301 redirects are in place to redirect traffic to your preferred domain. Pages that load successfully both with and without www. are treated as duplicate content! Not all versions of your page point to the same URL.
| URL | Resolved URL |
| http://runoob.com | https://www.runoob.com/ |
| https://runoob.com | HTTP header error |
| http://www.runoob.com | https://www.runoob.com/ |
| https://www.runoob.com | https://www.runoob.com/ |
| Attribute | Value |
| ⓘ viewport | width=device-width, initial-scale=1.0 |
ⓘ The owner has associated the following topics to the website.
✅ runoob.com website speed is fast. Page speed is important for visitors and search engines.
Get insights to improve your page loading time.
This domain loads at the median speed of 2.6 seconds.
runoob.com is faster than approximately 29 percent of the web. Your website page speed needs to be as fast as you can make it, without compromising the customer experience.
A good goal to achieve is a loading time of 2 seconds on desktop and mobile devices.
ⓘ This website is ranked #794 by Alexa.
This rank is traffic based. The lower the rank is, the better the domain is ranked.
| Country | Rank |
 Taiwan |
#815 |
 United States of America |
#24.549 |
 Hong Kong |
#462 |
 Japan |
#6.018 |
 China |
#171 |
Mobile Rendering
This website seems to be optimized for Mobile Visitors.
Phone
Tablet
A good text to HTML ratio is anywhere from 25 to 70%.
This percentage refers to the visible text ratio, as opposed to HTML elements, image tags and other non-visible information.
Great, we found headings on this page.
| Top level heading |
| 菜鸟教程 -- 学的不仅是技术，更是梦想！ |
| 2nd level heading |
| Html / css (2) |
| Javascript (2) |
| 服务端 (2) |
| 数据库 (2) |
| 移动端 (2) |
| Xml 教程 (2) |
| Asp.net (2) |
| Web service (2) |
| 开发工具 (2) |
| 网站建设 (2) |
For a better readability, only the first 20 <H4> tags are shown below.
| 4th level heading |
| 【学习 html】 |
| 【学习 html5】 |
| 【学习 css】 |
| 【学习 css3】 |
| 【学习 bootstrap3】 |
| 【学习 bootstrap4】 |
| 【学习 font awesome】 |
| 【学习 foundation】 |
| 【学习 javascript】 |
| 【学习 html dom】 |
| 【学习 jquery】 |
| 【学习 angularjs】 |
| 【学习 angularjs2】 |
| 【学习 vue.js】 |
| 【学习 react】 |
| 【学习 typescript】 |
| 【学习 jquery uı】 |
| 【学习 jquery easyuı 】 |
| 【学习 node.js】 |
| 【学习 ajax】 |
We found 98 images on this website.
93
ALT attributes are missing on your image tags. The issue affects 86 actual different images that could be loaded more than once in your page.
For a better readability, only the first 50 images missing a description are shown below.
| Image | Image URL | Occurrences |
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| - | data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAImklEQVR4Xs1XfUxV5x1 Lvfccy gUp... | 1 |
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| - | data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAA... | 1 |
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| - | data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAA... | 1 |
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| - | data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAGbElEQVR4XtWWS4hcWRnHf fce vWrU... | 1 |
| - | data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAA... | 1 |
| - | data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAA... | 1 |
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| - | data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAGT0lEQVR4XrVXS29TVxD 7tvXduI87L... | 1 |
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| - | data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAADHklEQVR42u2X60tTcRjHz18QUe8KLU... | 1 |
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| - | data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAABXElEQVR42u3WT0cEcRzH8WaSWRmrte... | 1 |
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Alternative text allows you to add a description to an image.
Google rely on alternative text attributes to determine relevance to a search query. Alternative text also makes an image more likely to appear in a Google image search.
It looks like you're missing alternative text for 93 images on runoob.com. Check your website to make sure it's specified for each image on the page.
For a better readability, only the first 50 internal links are shown below.
| Anchor | Type | URL |
| 菜鸟工具 | text | https://c.runoob.com/ |
| 面试考点 | text | https://datayi.cn/w/a9aanm9b |
| ⓘ Domain Registrar | ALIBABA CLOUD COMPUTING (BEIJING) CO., LTD. |
| ⓘ Registration Date | 06/23/2015 9 years, 5 months ago |
| ⓘ Last Modified | 04/24/2019 5 years, 7 months, 1 day ago |
| ⓘ Expiration Date | 06/23/2020 Expired |
| Host | IP Address | Country |
| vip1.alidns.com | 47.88.44.151 | United States |
| vip2.alidns.com | 140.205.1.2 | China |
| Domain |
Others (8.8%)
SOCIAL MEDIA PRESENCE
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