Display an indicator in CSS to show when a line has wrapped

Question

Display an indicator in CSS to show when a line has wrapped

Can CSS be used to visually indicate when a line is wrapped? For instance, consider the following code inside a "pre" block:

<html><body>Hello World</body></html>

I have set white-space to pre-wrap to prevent horizontal scrolling issues. It displays like this:

<html><body>Hello World</body>
</html>

However, I would like to show some sort of indication that the line has wrapped. Something along these lines:

<html><body>Hello World</body>
| </html>

This way, I can inform the reader that the | symbol signifies a line wrap. This could be particularly helpful in situations where breaking mid-line is undesirable, such as:

form.getSubmit().style.background
Color = 'green';

html css

Answer 1

Answer №1

Here's a creative idea to add style to your code snippets by using pseudoelements:

Check out the Codepen demo here

Markup

<pre>&lt;html>
   &lt;body>
       Hello World
   &lt;/body>
&lt;/html&gt;
</pre>

CSS

pre {
  background: yellowgreen;
  color: #fff;
  line-height: 1.5;
  font-size: 1.3rem;
  overflow: hidden;
  margin: 30px;
  border: 15px yellowgreen solid;
  position: relative;
  padding-left: 1.25em;
  text-indent: -1.25em;
}

pre:before {
  position: absolute;
  z-index: 1;
  line-height: inherit;
  font-size: inherit;
  color: #424242;
  content: "\A\2424\A\2424\A\2424..." /* Get creative with this */
}

You can customize the newline symbol used in the pre:before like the unicode U+2424 (␤) SYMBOL FOR NEWLINE.

The approach involves creating multiple pairs of \A\2424 inside the content property for each line of code to be displayed.

See the final result:

https://i.sstatic.net/81YHL.png

Answer 2

Here's a creative idea to add style to your code snippets by using pseudoelements:

Check out the Codepen demo here

Markup

<pre>&lt;html>
   &lt;body>
       Hello World
   &lt;/body>
&lt;/html&gt;
</pre>

CSS

pre {
  background: yellowgreen;
  color: #fff;
  line-height: 1.5;
  font-size: 1.3rem;
  overflow: hidden;
  margin: 30px;
  border: 15px yellowgreen solid;
  position: relative;
  padding-left: 1.25em;
  text-indent: -1.25em;
}

pre:before {
  position: absolute;
  z-index: 1;
  line-height: inherit;
  font-size: inherit;
  color: #424242;
  content: "\A\2424\A\2424\A\2424..." /* Get creative with this */
}

You can customize the newline symbol used in the pre:before like the unicode U+2424 (␤) SYMBOL FOR NEWLINE.

The approach involves creating multiple pairs of \A\2424 inside the content property for each line of code to be displayed.

See the final result:

https://i.sstatic.net/81YHL.png

Answer 3

Answer №2

When it comes to utilizing pure CSS, one option is to explore the ::first-line selector to apply different styling to your text (or other font-related properties). However, this method only affects the first line of content. In my suggestion, this would require creating a new <pre> block for each line of content, which may not be the most adaptable solution.

body {
  margin: 0;
}

pre {
  width: 250px;
  white-space: pre-wrap;
  background: aliceblue;

  /* Styling for lines after the first */
  color: red;
}

pre::first-line { /* Styling for the first line */
  color: green;
}

<pre>
&lt;html&gt;&lt;body&gt;Hello World&lt;/body&gt;&lt;/html&gt;
</pre>

Answer 4

When it comes to utilizing pure CSS, one option is to explore the ::first-line selector to apply different styling to your text (or other font-related properties). However, this method only affects the first line of content. In my suggestion, this would require creating a new <pre> block for each line of content, which may not be the most adaptable solution.

body {
  margin: 0;
}

pre {
  width: 250px;
  white-space: pre-wrap;
  background: aliceblue;

  /* Styling for lines after the first */
  color: red;
}

pre::first-line { /* Styling for the first line */
  color: green;
}

<pre>
&lt;html&gt;&lt;body&gt;Hello World&lt;/body&gt;&lt;/html&gt;
</pre>

Answer 5

Answer №3

This process is how I managed to achieve the desired outcome, thanks to the presence of an interpreter that serves as a bridge between the original text and HTML format. Initially, the interpreter inserted <pre> before and after the text. My modification involved placing <pre> at the beginning of each line and \n</pre> at the end of each line (where \n signifies a newline character for line breaks). Additionally, I created a 1 pixel gray image named gray.png and executed the following steps:

pre {
  white-space:pre-wrap;
  padding-left:1em;
  text-indent:-1em;
  background-image:url(gray.png);
  background-repeat:no-repeat;
  background-position:0px 1.5em;
  background-size:1em 100em;
}

As a result, when a normal line is displayed, the padding and text-indent negate each other's effects, positioning the text normally. However, when the text wraps around, it becomes indented due to the padding, while the background image appears on the left side. With a height of 100em, the background image spans multiple lines. To avoid repeating in both directions, I refrained from using repeat-y. Ultimately, I find the final visual appearance quite pleasing.

Answer 6

This process is how I managed to achieve the desired outcome, thanks to the presence of an interpreter that serves as a bridge between the original text and HTML format. Initially, the interpreter inserted <pre> before and after the text. My modification involved placing <pre> at the beginning of each line and \n</pre> at the end of each line (where \n signifies a newline character for line breaks). Additionally, I created a 1 pixel gray image named gray.png and executed the following steps:

pre {
  white-space:pre-wrap;
  padding-left:1em;
  text-indent:-1em;
  background-image:url(gray.png);
  background-repeat:no-repeat;
  background-position:0px 1.5em;
  background-size:1em 100em;
}

As a result, when a normal line is displayed, the padding and text-indent negate each other's effects, positioning the text normally. However, when the text wraps around, it becomes indented due to the padding, while the background image appears on the left side. With a height of 100em, the background image spans multiple lines. To avoid repeating in both directions, I refrained from using repeat-y. Ultimately, I find the final visual appearance quite pleasing.

Display an indicator in CSS to show when a line has wrapped

Answer №1

Answer №2

Answer №3

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