Serverraum Überwachung | ein MUSS für jede Firma und ein jedes Unternehmen - Didactum-online

Overview

Snoop Summary for didactum-online.de

This is a free and comprehensive report about didactum-online.de. The domain didactum-online.de is currently hosted on a server located in Germany with the IP address 178.16.58.196, where EUR is the local currency and the local language is German. If didactum-online.de was to be sold it would possibly be worth $64 USD (based on the daily revenue potential of the website over a 24 month period). Didactum-online.de receives an estimated 26 unique visitors every day - a small amount of traffic. This report was last updated 17th December, 2021.

About didactum-online.de

Site Preview:
Title:	Serverraum Überwachung \| ein MUSS für jede Firma und ein jedes Unternehmen
Description:	Raumüberwachung des EDV- und Serverraums mit IT Überwachungssystemen und Sensoren des Herstellers Didactum aus Münster / Westfalen.
Keywords and Tags:	business
Related Terms:	munster, sensoren, westfalen
Fav Icon:
Age:
Domain Created:
Domain Updated:
Domain Expires:

Review

Snoop Score

1/5

Valuation

$64 USD

Note: All valuation figures are estimates.

Popularity

Low

Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank:	9,537,603
Alexa Reach:
SEMrush Rank (US):
SEMrush Authority Score:
Moz Domain Authority:	0
Moz Page Authority:	0

Organic vs Paid (Google Ads)

Traffic

Visitors

Daily Visitors:	26
Monthly Visitors:	791
Yearly Visitors:	9,490

Note: All visitors figures are estimates.

Visitors By Country

Revenue

Daily Revenue:	$0 USD
Monthly Revenue:	$2 USD
Yearly Revenue:	$27 USD

Note: All revenue figures are estimates.

Revenue By Country

SEO

Backlinks Analysis (SEMrush)

Top Ranking Keywords (US)

Domain Analysis

	Value	Length
Domain:	didactum-online.de	18
Domain Name:	didactum-online	15
Extension (TLD):	de	2

Page Speed Analysis

Average Load Time:
Load Time Comparison:

Avg. (All Categories)

Performance

Accessibility

Best Practices

SEO

Progressive Web App

0–49 (Fail) 50–89 (Average) 90–100 (Pass)

Simulate loading on desktop

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for didactum-online.de. This includes details about optimizing page load times which can result in a better user experience.

Metrics

First Contentful Paint — 0.9 s
The time taken for the first image or text on the page to be rendered.

Largest Contentful Paint — 1.0 s
The timing of the largest text or image that is painted.

Time to Interactive — 0.9 s
The time taken for the page to become fully interactive.

Total Blocking Time — 0 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).

Cumulative Layout Shift — 0.01
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

First CPU Idle — 0.9 s
The time taken for the page's main thread to be quiet enough to handle input.

Max Potential First Input Delay — 50 ms
Users could experience a delay when interacting with the page.

First Meaningful Paint — 0.9 s
The time taken for the primary content of the page to be rendered.

Estimated Input Latency — 10 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive didactum-online.de as laggy when the latency is higher than 0.05 seconds.

Network Requests
Below is a list of network requests that were made during page load.

URL	Start Time (Ms)	End Time (Ms)	Transfer Size (Bytes)	Resource Size (Bytes)	Status Code	MIME Type	Resource Type
http://didactum-online.de/	0	208.55900004972	297	0	301	text/html
https://didactum-online.de/	209.05000006314	550.10000010952	326	0	301	text/html
http://www.didactum-online.de/	550.56900007185	759.64699999895	316	0	301	text/html
https://www.didactum-online.de/	760.05700009409	1137.9020001041	10241	42213	200	text/html	Document
https://www.didactum-online.de/typo3temp/assets/compressed/merged-b2a120aa03e6e07360a605d60d908599.css?1596783987	1154.780000099	1295.1800000155	35875	251519	200	text/css	Stylesheet
https://www.didactum-online.de/typo3temp/assets/compressed/merged-5cb40900fcbeb7c6b8f08c3ad8547b56.js?1596783957	1155.1640001126	1499.6120000724	3799	7759	200	application/javascript	Script
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Images/logo.png	1512.8560001031	1857.0270000491	3621	3247	200	image/png	Image
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Images/BootstrapPackageInverted.svg	1513.2280000253	1621.4770000661	1959	3784	200	image/svg+xml	Image
https://www.didactum-online.de/typo3temp/assets/compressed/merged-9ac48926624f36ec3442c8127ce0f202.js?1596783957	1298.063000082	1745.9140000865	77066	238891	200	application/javascript	Script
https://www.didactum-online.de/typo3temp/assets/compressed/merged-048e870d9f048eb6473c0d86c5e3abcc.js?1596783957	1501.3460000046	1610.9470000956	3630	8643	200	application/javascript	Script
https://www.google-analytics.com/analytics.js	1514.4610001007	1520.0000000186	19084	45958	200	text/javascript	Script
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Contrib/webfontloader/webfontloader.js	1514.6650000243	1856.4010000555	5463	12505	200	application/javascript	Script
https://www.didactum-online.de/fileadmin/panel-bilder/thumbs/thumb-A-Luftfeuchte.gif	1551.3140000403	1896.8350000214	18166	17791	200	image/gif	Image
https://www.google-analytics.com/r/collect?v=1&_v=j83&aip=1&a=1132041234&t=pageview&_s=1&dl=https%3A%2F%2Fwww.didactum-online.de%2F&ul=en-us&de=UTF-8&dt=Serverraum%20%C3%9Cberwachung%20%7C%20ein%20MUSS%20f%C3%BCr%20jede%20Firma%20und%20ein%20jedes%20Unternehmen&sd=24-bit&sr=800x600&vp=1350x940&je=0&_u=YEBAAEAB~&jid=985502869&gjid=2108265736&cid=2043688638.1597075136&tid=UA-184347-8&_gid=871908984.1597075136&_r=1&z=853504324	1589.1160001047	1592.5250001019	576	35	200	image/gif	Image
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/webfont.css	1866.4650000865	1974.2020000704	634	667	200	text/css	Stylesheet
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Fonts/bootstrappackageicon.min.css	1866.8860000325	2215.8810000401	854	1417	200	text/css	Stylesheet
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7j.woff	1979.3449999997	2096.1680000182	20572	20180	200	application/font-woff	Font
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xKydSBYKcSV-LCoeQqfX1RYOo3ik4zwlxdo.woff	1982.8450001078	2097.0590000506	20596	20204	200	application/font-woff	Font
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdo.woff	1986.1700000474	2102.8440000955	20288	19896	200	application/font-woff	Font
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Fonts/bootstrappackageicon.woff?230f7a8a34725ae4394eb49681bff170	2238.5770000983	2346.1550000357	3155	2764	200	application/font-woff	Font

Show Details

Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.

Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.

Tasks
Below is a list of the top-level main thread tasks that executed during page load.

Start Time (Ms)	End Time (Ms)
1175.18	9.292
1331.797	14.741
1535.886	15.063
1550.97	34.605
1592.221	31.191
1795.553	47.04
1894.9	6.971
2010.65	22.323
2135.057	16.95
2154.809	14.748
2252	13.269
2382.831	11.796

Show Details

Diagnostics
Below is a collection of useful page vitals.
View Data

Metrics
Below is a collection of metrics.
View Data

Opportunities

Properly size images
Images can slow down the page's load time. Didactum-online.de should consider serving more appropriate-sized images.

Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Didactum-online.de should consider lazy-loading offscreen and hidden images.

Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Didactum-online.de should consider minifying CSS files.

Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Didactum-online.de should consider minifying JS files.

Remove unused CSS — Potential savings of 32 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Didactum-online.de should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.

URL	Transfer Size (Bytes)	Potential Savings (Bytes)
https://www.didactum-online.de/typo3temp/assets/compressed/merged-b2a120aa03e6e07360a605d60d908599.css?1596783987	35875	32897

Show Details

Remove unused JavaScript — Potential savings of 58 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.

URL	Transfer Size (Bytes)	Potential Savings (Bytes)
https://www.didactum-online.de/typo3temp/assets/compressed/merged-9ac48926624f36ec3442c8127ce0f202.js?1596783957	77066	59495

Show Details

Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.

Serve images in next-gen formats
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.

Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.

Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.

Initial server response time was short — Root document took 380 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.

Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.

Diagnostics

Avoids enormous network payloads — Total size was 241 KiB
Large network payloads can cost users money and are linked to long load times.

URL	Transfer Size (Bytes)
https://www.didactum-online.de/typo3temp/assets/compressed/merged-9ac48926624f36ec3442c8127ce0f202.js?1596783957	77066
https://www.didactum-online.de/typo3temp/assets/compressed/merged-b2a120aa03e6e07360a605d60d908599.css?1596783987	35875
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xKydSBYKcSV-LCoeQqfX1RYOo3ik4zwlxdo.woff	20596
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7j.woff	20572
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdo.woff	20288
https://www.google-analytics.com/analytics.js	19084
https://www.didactum-online.de/fileadmin/panel-bilder/thumbs/thumb-A-Luftfeuchte.gif	18166
https://www.didactum-online.de/	10241
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Contrib/webfontloader/webfontloader.js	5463
https://www.didactum-online.de/typo3temp/assets/compressed/merged-5cb40900fcbeb7c6b8f08c3ad8547b56.js?1596783957	3799

Show Details

Uses efficient cache policy on static assets — 8 resources found
Didactum-online.de can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.

URL	Cache TTL (Ms)	Transfer Size (Bytes)
https://www.google-analytics.com/analytics.js	7200000	19084
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xKydSBYKcSV-LCoeQqfX1RYOo3ik4zwlxdo.woff	2592000000	20596
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7j.woff	2592000000	20572
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdo.woff	2592000000	20288
https://www.didactum-online.de/fileadmin/panel-bilder/thumbs/thumb-A-Luftfeuchte.gif	2592000000	18166
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Images/logo.png	2592000000	3621
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Fonts/bootstrappackageicon.woff?230f7a8a34725ae4394eb49681bff170	2592000000	3155
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Images/BootstrapPackageInverted.svg	2592000000	1959

Show Details

Avoids an excessive DOM size — 304 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.

Statistic	Element	Value
Total DOM Elements		304
Maximum DOM Depth	SHOW DETAILS	16
Maximum Child Elements	SHOW DETAILS	10

Show Details

Avoid chaining critical requests — 7 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Didactum-online.de should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.

JavaScript execution time — 0.0 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.

URL	Total CPU Time (Ms)	Script Evaluation (Ms)	Script Parse (Ms)
https://www.didactum-online.de/	140.531	5.167	1.505

Show Details

Minimizes main-thread work — 0.3 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.

Category	Time Spent (Ms)
Script Evaluation	97.366
Style & Layout	94.573
Other	46.571
Rendering	23.822
Parse HTML & CSS	20.811
Script Parsing & Compilation	11.089

Show Details

Keep request counts low and transfer sizes small — 20 requests • 241 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.

Resource Type	Requests	Transfer Size (Bytes)
Total	20	246518
Script	5	109042
Font	4	64611
Stylesheet	3	37363
Image	4	24322
Document	1	10241
Other	3	939
Media	0	0
Third-party	2	19660

Show Details

Minimize third-party usage — Third-party code blocked the main thread for 0 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.

Third-Party	Transfer Size (Bytes)	Main-Thread Blocking Time (Ms)
SHOW DETAILS	19660	0

Show Details

Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.

Element
Backup- und Anti-Virus- Lösungen sind in einem jeden EDV- und Serverraum vorhan…

Show Details

Avoid large layout shifts — 3 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.

Element	CLS Contribution
Thema Datenklau - physische Gefahren im Serverraum erkennen Auch physische Gef…	0.0065063837247658
Auch freigesetztes Wasser oder Feuchtigkeit im Serverraum kann für die Verfügba…	0.0026435555763974
IT Überwachungssystem Kontakt Impressum Über uns	0.0004236882270743

Show Details

Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.

Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.

Avoid long main-thread tasks
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.

Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Metrics

Speed Index — 1.4 s
The time taken for the page contents to be visibly populated.

Opportunities

Eliminate render-blocking resources — Potential savings of 180 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Didactum-online.de should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.

URL	Transfer Size (Bytes)	Potential Savings (Ms)
https://www.didactum-online.de/typo3temp/assets/compressed/merged-b2a120aa03e6e07360a605d60d908599.css?1596783987	35875	110
https://www.didactum-online.de/typo3temp/assets/compressed/merged-5cb40900fcbeb7c6b8f08c3ad8547b56.js?1596783957	3799	150

Show Details

Avoid multiple page redirects — Potential savings of 530 ms
Redirects can cause additional delays before the page can begin loading. Didactum-online.de should avoid multiple or unnecessary page redirects.

URL	Time Spent (Ms)
(Start) http://didactum-online.de/	0
https://didactum-online.de/	190
http://www.didactum-online.de/	150
https://www.didactum-online.de/	190

Show Details

Preload key requests — Potential savings of 260 ms
Key requests can be preloaded by using '<link rel=preload>'. Didactum-online.de should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.

URL	Potential Savings (Ms)
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/webfont.css	260
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Fonts/bootstrappackageicon.min.css	260
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Fonts/bootstrappackageicon.woff?230f7a8a34725ae4394eb49681bff170	120

Show Details

Diagnostics

Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.

URL	Potential Savings (Ms)
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7j.woff	116.82300001848
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xKydSBYKcSV-LCoeQqfX1RYOo3ik4zwlxdo.woff	114.21399994288
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdo.woff	116.67400004808
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Fonts/bootstrappackageicon.woff?230f7a8a34725ae4394eb49681bff170	107.57799993735

Show Details

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of didactum-online.de. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.

The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.

`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.

No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.

`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.

`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.

ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.

`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.

Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.

`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.

`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.

ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.

`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.

`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.

ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.

No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.

`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.

Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.

`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.

Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.

Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.

`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.

Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.

Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.

Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.

List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.

Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.

`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.

`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.

`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Didactum-online.de may provide assistance to deaf or hearing-impaired users with captions on videos.

`<video>` elements contain a `<track>` element with `[kind="description"]`
Didactum-online.de may provide relevant information that dialogue cannot, by using audio descriptions.

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.

Failing Elements
IT Überwachungssystem
Kontakt
Impressum
Über uns
Datenschutzerklärung
Impressum
Konfigurieren
Alle Cookies ablehnen
Alle Cookies akzeptieren

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Navigation

Heading elements are not in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.

Failing Elements
Hinweis zu Cookies

Show Details

Internationalization and localization

`<html>` element does not have a valid value for its `[lang]` attribute.
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.

Failing Elements
html

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Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.

Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.

Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.

The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.

User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.

Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.

Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.

Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.

Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.

HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that didactum-online.de should incorporate. This includes practices such as protecting pages with HTTPS.

Passing (10)
Failing (4)

Audits

Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.

Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.

Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.

Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.

Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.

Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.

Name	Version
Bootstrap	4.4.1
jQuery	3.4.1
Modernizr	3.8.0
WebFont Loader
Hammer.js	2.0.7

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Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.

Audits

Does not use HTTPS — 2 insecure requests found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.

Insecure URL
http://didactum-online.de/
http://www.didactum-online.de/

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Links to cross-origin destinations are unsafe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.

Failing Anchors
Technologie Portal

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Includes front-end JavaScript libraries with known security vulnerabilities — 2 vulnerabilities detected
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.

Library Version	Vulnerability Count	Highest Severity
SHOW DETAILS	2	Medium

Show Details

Audits

Browser errors were logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.

URL	Description
https://www.didactum-online.de/typo3temp/assets/compressed/merged-9ac48926624f36ec3442c8127ce0f202.js?1596783957	TypeError: Cannot read property 'classList' of undefined at animateHeader (https://www.didactum-online.de/typo3temp/assets/compressed/merged-9ac48926624f36ec3442c8127ce0f202.js?1596783957:37:181)

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SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for didactum-online.de. This includes optimizations such as providing meta data.

Passing (14)
Manual Checks (1)

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of didactum-online.de on mobile screens.

Document uses legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.

Tap targets are sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.

Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.

Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.

Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.

Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.

Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.

Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.

Links are crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.

Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.

robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of didactum-online.de. This includes details about web app manifests.

Fast and reliable

Page load is fast enough on mobile networks
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.

Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of didactum-online.de on mobile screens.

Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.

Fast and reliable

Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.

`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 2 insecure requests found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.

Insecure URL
http://didactum-online.de/
http://www.didactum-online.de/

Show Details

Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.

Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data

Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data

Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.

Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.

Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.

Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.

Avg. (All Categories)

Performance

Accessibility

Best Practices

SEO

Progressive Web App

0–49 (Fail) 50–89 (Average) 90–100 (Pass)

Simulate loading on mobile

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for didactum-online.de. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Total Blocking Time — 70 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).

Cumulative Layout Shift — 0
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

Max Potential First Input Delay — 110 ms
Users could experience a delay when interacting with the page.

Estimated Input Latency — 10 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive didactum-online.de as laggy when the latency is higher than 0.05 seconds.

Network Requests
Below is a list of network requests that were made during page load.

URL	Start Time (Ms)	End Time (Ms)	Transfer Size (Bytes)	Resource Size (Bytes)	Status Code	MIME Type	Resource Type
http://didactum-online.de/	0	209.10500001628	297	0	301	text/html
https://didactum-online.de/	209.46499996353	548.63699991256	311	0	301	text/html
http://www.didactum-online.de/	548.994999961	757.40699993912	316	0	301	text/html
https://www.didactum-online.de/	757.80999998096	1140.7929999987	10241	42213	200	text/html	Document
https://www.didactum-online.de/typo3temp/assets/compressed/merged-b2a120aa03e6e07360a605d60d908599.css?1596783987	1156.7169999471	1543.5319999233	35902	251519	200	text/css	Stylesheet
https://www.didactum-online.de/typo3temp/assets/compressed/merged-5cb40900fcbeb7c6b8f08c3ad8547b56.js?1596783957	1157.065999927	1514.8379999446	3799	7759	200	application/javascript	Script
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Images/logo.png	1562.8279999364	1669.8759999126	3594	3247	200	image/png	Image
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Images/BootstrapPackageInverted.svg	1563.312000013	1903.8980000187	1986	3784	200	image/svg+xml	Image
https://www.didactum-online.de/typo3temp/assets/compressed/merged-9ac48926624f36ec3442c8127ce0f202.js?1596783957	1516.8519999133	1645.9299999988	77039	238891	200	application/javascript	Script
https://www.didactum-online.de/typo3temp/assets/compressed/merged-048e870d9f048eb6473c0d86c5e3abcc.js?1596783957	1546.074999962	1677.1149999695	3630	8643	200	application/javascript	Script
https://www.google-analytics.com/analytics.js	1563.7390000047	1568.2449999731	19085	45958	200	text/javascript	Script
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Contrib/webfontloader/webfontloader.js	1564.0359999379	1906.0670000035	5463	12505	200	application/javascript	Script
https://www.didactum-online.de/fileadmin/_processed_/f/c/csm_thumb-A-Luftfeuchte_927d87e734.gif	1594.1289999755	1936.0079999315	23279	22904	200	image/gif	Image
https://www.google-analytics.com/r/collect?v=1&_v=j83&aip=1&a=225154135&t=pageview&_s=1&dl=https%3A%2F%2Fwww.didactum-online.de%2F&ul=en-us&de=UTF-8&dt=Serverraum%20%C3%9Cberwachung%20%7C%20ein%20MUSS%20f%C3%BCr%20jede%20Firma%20und%20ein%20jedes%20Unternehmen&sd=24-bit&sr=360x640&vp=360x640&je=0&_u=YEBAAEAB~&jid=1180506068&gjid=2125672810&cid=158734545.1597075149&tid=UA-184347-8&_gid=797969952.1597075149&_r=1&z=491349288	1621.916999924	1625.4719999852	576	35	200	image/gif	Image
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/webfont.css	1912.4029999366	2020.8080000011	634	667	200	text/css	Stylesheet
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Fonts/bootstrappackageicon.min.css	1912.9239999456	2021.4419999393	827	1417	200	text/css	Stylesheet
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7j.woff	2026.0359999957	2134.4699999318	20572	20180	200	application/font-woff	Font
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xKydSBYKcSV-LCoeQqfX1RYOo3ik4zwlxdo.woff	2028.0599999242	2139.7649999708	20596	20204	200	application/font-woff	Font
https://www.didactum-online.de/typo3temp/assets/bootstrappackage/fonts/34b6f09d2160836c09a63c8351093eadf788ed4cb9c6c596239ff2ffe69204f8/6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdo.woff	2030.0109999953	2138.8489999808	20288	19896	200	application/font-woff	Font
https://www.didactum-online.de/typo3conf/ext/bootstrap_package/Resources/Public/Fonts/bootstrappackageicon.woff?230f7a8a34725ae4394eb49681bff170	2042.4159999238	2149.7939999681	3155	2764	200	application/font-woff	Font

Show Details

Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.

Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.

Tasks
Below is a list of the top-level main thread tasks that executed during page load.

Start Time (Ms)	End Time (Ms)
1169.523	8.743
1571.118	9.631
1580.822	12.044
1592.883	27.161
1624.942	22.579
1685.71	26.624
1714.853	8.665
2049.035	14.354
2164.026	11.745
2179.07	12.42