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

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Archive for the ‘CSS’ Category

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Naughty naughty no alt: CSS style to clearly show which images lack an alt-text

Posted by jpluimers on 2021/10/05

The CSS from [WayBack/Archive.is] Naughty naughty no alt that shows the below red moving rendering of images that do not have an alt-text is simple:

Read the rest of this entry »

Posted in Bookmarklet, CSS, Development, HTML, HTML5, Power User, Software Development, Web Browsers, Web Development | Leave a Comment »

html – CSS Display an Image Resized and Cropped – Stack Overflow

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 »

html – How can I scale the content of an iframe? – Stack Overflow

Posted by jpluimers on 2021/08/19

I used [WayBack] html – How can I scale the content of an iframe? – Stack Overflow as starting point to scale some iframes.

In my case, I had to scale up (by a 25% so a factor 1.25) instead of scale down.

What I observed so far in recent Chrome versions is:

  1. The wrapping div is still needed, otherwise the outer size and inner size of the frame mismatches
  2. The wrapping div and the wrapped iframe need to have the same dimensions (so unlike the Stack Overflow answers, no need to scale the width/height of the div; keep the same values as the iframe)

The div uses class calendar_wrap.

The iframe uses class calendar_iframe.

This is part of my CSS:

body {
      margin: 0; /* override browser setting for body `margin: 8px;` */
      overflow: hidden; /* remove scroll bars; does not work for iframes  */
    }

    /* ... */

    iframe {
      border-width: 0; /* override browser setting for iframe `border-width: 2px; */
      height: 100vh;
      width:   50vw;
      overflow: hidden; /* remove scroll bars; does not work for iframes  */
    }

     /* wrap and iframe zoom as per https://stackoverflow.com/questions/166160/how-can-i-scale-the-content-of-an-iframe */
    .calendar_wrap {
      float: left;

      height: 70vh;
      width:  35vw; /* calc(35vw / 1.25); */

      padding: 0;
      background-color: blue;
    }

    .calendar_iframe {
      float: left;

      width:  35vw;

      -ms-transform: scale(1.25);
      -moz-transform: scale(1.25);
      -o-transform: scale(1.25);
      -webkit-transform: scale(1.25);
      transform: scale(1.25);

      -ms-transform-origin: 0 0;
      -moz-transform-origin: 0 0;
      -o-transform-origin: 0 0;
      -webkit-transform-origin: 0 0;
      transform-origin: 0 0;
    }

    /* ... */

–jeroen

Posted in Chrome, CSS, Development, HTML, Power User, Software Development, Web Browsers, Web Development | Leave a Comment »

css color picker – Google Search

Posted by jpluimers on 2021/08/12

Probably old, but there is an embedded [WayBack] css color picker – Google Search that on each refresh switches colours:

–jeroen

Posted in Color (software development), CSS, Development, Google, GoogleSearch, HTML, Power User, Software Development, Web Development | Leave a Comment »

Simple iframe clock via Free Clocks for Your Website

Posted by jpluimers on 2021/08/11

Using [WayBack] Free Clocks for Your Website, I created this clock for a 1920×1080 web dashboard which is a web page hosted on [WayBack] raw.githack.com with an iframe hosted at www.timeanddate.com

I know that is a risk, but that is OK for now: that site has existed for a very long time and probably will last a while.

There is a truckload of options you can use, despite the clock being simple. Luckily the [WayBack] FAQ: Free Clocks for Your Website explains these options.

This is the gist of the above “this clock” page:


<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta name="robots" content="noindex, nofollow">
<meta name="googlebot" content="noindex, nofollow">
<style type="text/css">
body {
margin: 0; /* override browser setting for body `margin: 8px;` */
overflow: hidden; /* remove scroll bars; does not work for iframes */
}
.box {
float: left;
width: 100vw; /* Firefox/Chrome outside Mac OS X: force viewport-width */
overflow: hidden; /* remove scroll bars; does not work for iframes */
background-color: azure;
}
iframe {
border-width: 0; /* override browser setting for iframe `border-width: 2px; */
height: 100vh;
width: 50vw;
}
.clock_iframe {
float: right;
height: 30vh;
width: 16vw;
}
</style>
<title>Clock in frame</title>
</head>
<body>
<div class="box">
<iframe class="clock_iframe" src="https://freesecure.timeanddate.com/clock/i6xvy9ve/n16/szw300/szh300/hoc000/cf100/hgr0/fiv0/fas34/fdi74/mqv0/mhc000/mhs3/mhl20/mhw1/mhd84/mmv0/hhs1/hms1/hsc000/hss1&quot; frameborder="0" width="300" height="300">
<!– https://www.timeanddate.com/clocks/free.html –>
</iframe>
</div
</body>
</html>

view raw

simple-large-clock.html

hosted with ❤ by GitHub

–jeroen

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

HTML table border styles

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:

  1. [WayBack] w3schools: CSS border-style property
  2. [WayBack] w3schools: CSS Borders
  3. [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 »

Peeking under the hood of redesigned Gmail – Boris – Medium

Posted by jpluimers on 2020/06/25

From a while back, but still relevant as the speed of the GMail web-UI still has not improved.

[WayBack/Archive.is] Peeking under the hood of redesigned Gmail – Boris – Medium

Via:

–jeroen

Read the rest of this entry »

Posted in CSS, Development, GMail, Google, HTML, JavaScript/ECMAScript, Power User, Scripting, Software Development, Web Development | Leave a Comment »

108 byte CSS Layout Debugger · GitHub

Posted by jpluimers on 2020/05/13

A cool [WayBack] 108 byte CSS Layout Debugger · GitHub (and sligtly different versions) that makes your page look like this:

[].forEach.call($$("*"),function(a){a.style.outline="1px solid #"+(~~(Math.random()*(1<<24))).toString(16)})

 

–jeroen

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

CSS Animation How To Tutorial – Dev Tuts

Posted by jpluimers on 2020/01/22

So as the author of CSS3 Animate It I have a good background in CSS animation. Before CSS3 was released you would have to resort to using JS for animation…

Even after CSS3 got introduced, I’m still not sure I’d use animation: [WayBack] CSS Animation How To Tutorial – Dev Tuts

Via:

–jeroen

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

CSS flex-box layout – Wikipedia

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

Read the rest of this entry »

Posted in CSS, Development, HTML, HTML5, Software Development, Web Development | Leave a Comment »

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