Archive for the ‘HTML5’ Category
Posted by jpluimers on 2022/09/15
I come from a background of Delphi, Visual Studio and Notepad++ editors that historically have expanded their functionality over decades of releases.
When switching much of my development to Visual Studio Code, which out of the box aims at basic support (which has grown remarkably over the years so it’s way beyond basic now), I decided to review my editing behaviours see if plugins (in vscode speak “extensions marketplace“) would assist me with that.
One of my behaviours I wanted to get rid of is heavily use of keyboard macros, so when doing more web-stuff, I bumped into Emmet (that in the past was called Zen Code).
I bumped into Emmet because I wanted to refactor quite a few bits of html, and embed many sections of text in tags. Normally I would have written a macro for that, but now I did a quick [Wayback/Archive.is] vscode html embed text in element – Google Search and bumped into [Wayback/Archive.is] html – How to do tag wrapping in VS code? – Stack Overflow (thanks [Wayback/Archive.is] Alex!)
Since Visual Studio Code has built-in support for Emmet, here are some links so I can quickly find them back:
Hopefully I will now also less rely on user-defined snippets, though they are still available: [Wayback/Archive.is] Snippets in Visual Studio Code
Using Emmet eventually might help me in my blog-writing too, which still is heavily WordPress.com, known for its limited editor, based.
Apparently, my Google Search fu still is good enough to find these kinds of gems (:
–jeroen
Posted in .NET, CSS, Development, HTML, HTML5, Software Development, Visual Studio and tools, vscode Visual Studio Code, Web Development | Leave a Comment »
Posted by jpluimers on 2021/11/04
This does not happen often, and I found the way that [WayBack] Duden Offline is indicated hilarious!
It’s just a “basic” HTML page showing the meaning of “Wartung” (German word for Maintenance).
Duden is het German equivalent of the Oxford English Dictionary.
Not all of the huge site was gone. Part of the “Rechtschreibung” was still there, including the Wikipedia entry (:
I wonder what that one shows during maintenance (:
Links:
–jeroen
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Posted in CSS, Development, Fun, HTML, HTML5, Power User, Software Development, Web Development | Leave a Comment »
Posted by jpluimers on 2021/08/25
[WayBack] html – CSS Display an Image Resized and Cropped – Stack Overflow (thanks [WayBack] roborourke!); see full answer link for runnable snippet and HTML (the WordPress editor keeps fucking up preformatted code blocks with html or XML in it).
You could use a combination of both methods eg.
.crop {
width: 200px;
height: 150px;
overflow: hidden;
}
.crop img {
width: 400px;
height: 300px;
margin: -75px 0 0 -100px;
}
You embed the img in a div with class .crop, or in-line the styles in the img and div tags.
--jeroen
Posted in CSS, Development, HTML, HTML5, SocialMedia, Software Development, Web Development, WordPress, WordPress | Leave a Comment »
Posted by jpluimers on 2021/01/20
I always get confused when I see this kind of HTML:
<td style="border: 1px black; border-style: none solid solid;">
This raises questions like:
- When less than 4 borders are mentioned, which borders are solid, and which borders are none?
- What is the order of 0…4 borders?
Luckily these links helped me:
- [WayBack] w3schools: CSS border-style property
- [WayBack] w3schools: CSS Borders
- [WayBack] border-style – CSS: Cascading Style Sheets | MDNThe border-style CSS property is a shorthand property that sets the line style for all four sides of an element’s border.
The first two made me find the last one, which is best as it has a CSS demo button (that also works on the WayBack link), a list of examples, and even better, answers the above questions with the “border-style” list below.
I rephrased their list into a table emphasising the clock-wise order:
The number of values determine the sides affected; thinking clock-wise is easiest to get it:
| # values |
affected sides |
example |
top |
right |
bottom |
left |
| 1 |
all: top, right, bottom, left |
solid |
solid |
solid |
solid |
solid |
| 2 |
top & bottom, right & left |
none solid |
none |
solid |
none |
solid |
| 3 |
top, right & left, bttom |
dotted none solid |
dotted |
none |
solid |
none |
| 4 |
top, right, bottom, left |
double dotted solid none |
double |
dotted |
solid |
none |
Their list:
The border-style property may be specified using one, two, three, or four values.
- When one value is specified, it applies the same style to all four sides.
- When two values are specified, the first style applies to the top and bottom, the second to the left and right.
- When three values are specified, the first style applies to the top, the second to the left and right, the third to the bottom.
- When four values are specified, the styles apply to the top, right, bottom, and left in that order (clockwise).
Each value is a keyword chosen from the list below.
then it continues with a table showing the outcome of the various line style values you can put in:
<line-style>- Describes the style of the border. It can have the following values:
none |
|
Like the hidden keyword, displays no border. Unless a background-image is set, the calculated value of border-top-width will be 0, even if the specified value is something else. In the case of table cell and border collapsing, the none value has the lowest priority: if any other conflicting border is set, it will be displayed. |
hidden |
|
Like the none keyword, displays no border. Unless a background-image is set, the calculated value of border-top-width will be 0, even if the specified value is something else. In the case of table cell and border collapsing, the hidden value has the highestpriority: if any other conflicting border is set, it won’t be displayed. |
dotted |
|
Displays a series of rounded dots. The spacing of the dots is not defined by the specification and is implementation-specific. The radius of the dots is half the calculated border-top-width. |
dashed |
|
Displays a series of short square-ended dashes or line segments. The exact size and length of the segments are not defined by the specification and are implementation-specific. |
solid |
|
Displays a single, straight, solid line. |
double |
|
Displays two straight lines that add up to the pixel size defined by border-width or border-top-width. |
groove |
|
Displays a border with a carved appearance. It is the opposite of ridge. |
ridge |
|
Displays a border with an extruded appearance. It is the opposite of groove. |
inset |
|
Displays a border that makes the element appear embedded. It is the opposite of outset. When applied to a table cell with border-collapse set to collapsed, this value behaves like groove. |
outset |
|
Displays a border that makes the element appear embossed. It is the opposite of inset. When applied to a table cell with border-collapse set to collapsed, this value behaves like ridge. |
–jeroen
Posted in CSS, Development, HTML, HTML5, Software Development, Web Development | Leave a Comment »
Posted by jpluimers on 2020/12/08
Since I always forget that you can have any cell marked as th to make it a header: [WayBack] Tables with two headers • Tables • WAI Web Accessibility Tutorials.
This is not just limited to top rows, you can use it any where:
- in the left column
- in any other row
- in any other column
- in individual cells
In addition, a table can also have a caption, which is not just useful for screen-readers: it benefits general readability.
Quoting the page:
For such tables, use the <th> element to identify the header cells and the scope attribute to declare the direction of each header. The scopeattribute can be set to row or col to denote that a header applies to the entire row or column, respectively.
Additionally, you can use the <caption> element to identify the table in a document. This is particularly useful for screen-reader users browsing the web page in “table mode” where they can navigate from table to table.
Examples on that page:
–jeroen
Posted in Development, HTML, HTML5, Software Development, Web Development | Leave a Comment »
Posted by jpluimers on 2020/11/03
Since I keep forgetting this has been possible since the introduction of html 5: [WayBack] html – Is it possible to specify a starting number for an ordered list? – Stack Overflow:
If you need the functionality to start an ordered list (OL) at a specific point, you’ll have to specify your doctype as HTML 5; which is:
<!doctype html>
With that doctype, it is valid to set a start attribute on an ordered list. Such as:
<ol start="6">
<li>Lorem</li>
<li>Ipsum</li>
<li>Dolor</li>
</ol>
–jeroen
Posted in Development, HTML, HTML5, Software Development, Web Development | Leave a Comment »
Posted by jpluimers on 2019/09/02
Being a back-end and library person by heart, I am always late in the web-UI game, so this is on my list of things to try: CSS flex-box layout – Wikipedia.
I saw it being used by [WayBack] markdownlint demo: Demo for markdownlint, a Node.js style checker and lint tool for Markdown/CommonMark files.
Some links that should me help further:
–jeroen
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Posted in CSS, Development, HTML, HTML5, Software Development, Web Development | Leave a Comment »
Posted by jpluimers on 2019/06/07
`ls` colour codes
I got confused as I thought red text would mean an error.
But they’re not: greenish yellow on a read background means error (a symbolic link to a place that’s no longer there).
It’s the output of https://github.com/gkotian/gautam_linux/blob/master/scripts/colours.sh as the one at
Actually the script is here https://raw.githubusercontent.com/gkotian/gautam_linux/master/scripts/colours.sh as the one at [WayBack] command line – What do the different colors mean in the terminal? – Ask Ubuntu failed with errors like this one:
-bash: *.xbm: bad substitution
The full script output is below.
Since various terminals have a different mapping from colours in the ANSI escape code colour table, I used the standard HTML colours using (which slightly differs from the Terminal.app screenshot on the right):
References:
Note that the shell on Mac OS X uses a different way of configuring colours CLICOLOR as described in [WayBack] settings – CLICOLOR and LS_COLORS in bash – Unix & Linux Stack Exchange. I might cover that another day.
Script output:
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Posted in *nix, *nix-tools, ANSI escape code, bash, CSS, Development, Encoding, HTML, HTML5, Linux, openSuSE, Power User, Software Development, SuSE Linux, Tumbleweed, Web Development | Leave a Comment »
Posted by jpluimers on 2019/01/23
As a back-end person, sometimes I wondered about CDATA in front-end HTML code was for, especially in JavaScript and CSS style elements.
[WayBack] HTML vs. XHTML – WHATWG Wiki explains how to be compatible with XHTML, HTML, XML based tools and older browsers:
The following code with escaping can ensure script and style elements will work in both XHTML and HTML, including older browsers.
In both cases, XML ignores the first comment and then uses the CDATA section to avoid the need for escaping special characters < and & within the rest of the contents (with subsequent JavaScript comments added within to ensure the HTML-oriented code is ignored by JavaScript).
In HTML, older browsers might display the content without the content being within a comment, so comments are used to hide this from them (while modern HTML browsers will run code inside the comments). The subsequent JavaScript comment is added to negate the text added for the sake of XHTML.
The <style> requires the /**/ comments since CSS does not support the single line ones.
<!---->
...
//-->
<style type="text/css"><!--/*--><![CDATA[/*><!--*/
...
/*]]>*/--></style>
If not concerned about much older browsers (from which one is hiding the HTML) one can use the simpler:
//
<style>/*<![CDATA[*/
/*]]>*/</style>
Also note that the sequence “]]>” is not allowed within a CDATA section, so it cannot be used in true XHTML-embedded JavaScript without escaping.
–jeroen
via:
Posted in CSS, Development, HTML, HTML5, JavaScript/ECMAScript, Scripting, Software Development, Web Development | Leave a Comment »
The Wiert Corner - irregular stream of stuff 