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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘HTML’ Category

Eight Dollars – Chrome Web Store: see who fell for the twitter blue scam

Posted by jpluimers on 2023/04/03

[Wayback/Archive] Eight Dollars – Chrome Web Store

It’s available for other browsers too (Brave, FireFox, Edge, Opera; Safari should become supported too), and more importantly: open source as well at [Wayback/Archive] wseagar/eight-dollars: A browser extension that shows twitter blue vs real verified users.

Via [Wayback/Archive] Alan Neilan on Twitter: “@IanColdwater pssst check out”.


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Posted in CSS, Development, HTML, JavaScript/ECMAScript, PowerShell, Scripting, Software Development, Web Development | Leave a Comment »

Some QR code generators on

Posted by jpluimers on 2023/01/03

QR codes often are the quickest way to copy/paste some data to a smartphone.

So, via [Wayback/Archive] generate qr code – Google Search, I found these two (the first is based on the JavaScript source in second, but has QR codes with larger blocks and is therefore easier to scan):

  1. [Wayback/Archive] QR Code Generator
  2. [Wayback/Archive] QR Code Generator


Posted in Development, HTML, JavaScript/ECMAScript, Scripting, Software Development, Web Development | Leave a Comment »

Some experience of as a replacement for

Posted by jpluimers on 2022/12/01

With [Wayback/Archive] having sunset years ago, but still having a [Wayback/Archive] few links to it from my blog, it was time to take a closer look at the alternative [Wayback/Archive]

First of all, htmlpreview needs more examples. I might submit a pull request for it later, as it is open source at [Archive/Archive] htmlpreview/ HTML Preview for GitHub Repositories.

Second, some actual example URLs, based on content I previously accessed through

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Posted in Development, DVCS - Distributed Version Control, git, GitHub, HTML, Power User, rawgit, Software Development, Source Code Management, Versioning, Web Development | Leave a Comment »

HTML / XML / RSS link checker – Visual Studio Marketplace

Posted by jpluimers on 2022/10/04

On my list of Visual Studio Code extensions to try (after I change the shortcuts, as direct Alt shortcuts are not a good idea, luckily those are configurable)

[Wayback/] HTML / XML / RSS link checker – Visual Studio Marketplace (partly paraphrased):

VSCode extension that checks for broken links in an HTML, XML, RSS, PHP, or Markdown file.

Checks currently open file:

  • for broken links in anchor-href, link-href, img-src, and script-src tags in currently-open HTML or PHP file
  • both clearnet and onion (Tor) links
  • for badly-formatted mailto links, and duplicate local anchors (anchor-name, anchor-id)
  • for working HTTPS equivalents of HTTP links

Optionally checks for invalid characters and common mistakes (missing tag content, empty attribute value, more).

Also checks for errors in a small subset of semantic HTML tags (in HTML and PHP files): checks that each page has header, main, footer; checks that each heading is inside a section, article, or aside; checks that each section/article/aside has exactly one heading in it; checks that heading values are nested properly.

To see/change settings for this extension, open Settings (Ctrl+,) / Extensions / “HTML / XML / RSS link checker”.

To change the key-combinations for this extension, open File / Preferences / Keyboard Shortcuts and search for Alt+H or Alt+T or Alt+M or Alt+L.


Posted in .NET, Development, HTML, Lightweight markup language, MarkDown, Power User, RSS, Software Development, vscode Visual Studio Code, Web Development, XML, XML/XSD | Leave a Comment »

Using styles on just html tr to format the borders of table rows

Posted by jpluimers on 2022/09/22

A long time ago, I found out that by default, you could only format td elements in HTML tables: somehow doing that with just tr failed, and I never understood why.

Since I wasn’t doing a lot of html stuff back then, I just lived with the few occurrences and moved on.

A while ago, I needed html tables again, and – since hosted blogs do not allow CSS style sheets – I had to use inline style attributes. That would bloat many td elements, so I did a [Wayback/] html table border below row – Google Search, where the first few hits – all on StackOverflow – tremendously helped my to understand why this was the case and how to fix it:

  • In [Wayback/] css – Giving a border to an HTML table row, – Stack Overflow, [Wayback/] User Jukka K. Korpela – Stack Overflow explains about the various border models, but only shows a a solution having the CSS style sheet in a style element which disallows:
    You can set border properties on a tr element, but according to the CSS 2.1 specification, such properties have no effect in the separated borders model, which tends to be the default in browsers. Ref.: 17.6.1 The separated borders model. (The initial value of border-collapse is separate according to CSS 2.1, and some browsers also set it as default value for table. The net effect anyway is that you get separated border on almost all browsers unless you explicitly specifi collapse.)
    Thus, you need to use collapsing borders. Example:
    table { border-collapse: collapse; }
    tr:nth-child(3) { border: solid thin; }

    From that, I learned about these:

    • [Wayback/] Tables: borders
      There are two distinct models for setting borders on table cells in CSS. One is most suitable for so-called separated borders around individual cells, the other is suitable for borders that are continuous from one end of the table to the other. Many border styles can be achieved with either model, so it is often a matter of taste which one is used.
      Value: collapse | separateinherit
      Initial: separate
      Applies to: table‘ and ‘inline-table’ elements
      Inherited: yes
      Percentages: N/A
      Media: visual
      Computed value: as specified
      This property selects a table’s border model. The value ‘separate‘ selects the separated borders border model. The value ‘collapse‘ selects the collapsing borders model. The models are described below.
    • [Wayback/] Tables: separated borders (default)
    • [Wayback/] Tables: collapsing borders
  • In [Wayback/] Create table with only bottom border in HTML – Stack Overflow, [Wayback/] Martin2904 explains how to solve it with CSS style sheets and inline style attributes, but does not link to the “why”:
    Just use the following code-snippet and paste it in you style.css
    table {
      border-collapse: collapse;
      border-bottom: 1px solid black;
    Without using style.css
    <table style="border-collapse: collapse;">
        <tr style="border-bottom: 1px solid black;">


Posted in CSS, Development, HTML, Software Development, Web Development | Leave a Comment »

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