how can i hide or replace the triangle marker that appears using the summary and details tags

To hide or replace the triangle marker that appears with the <summary> tag in the <details> element, you can use specific CSS rules targeting the marker. Here are the steps you can take:

Hiding the Default Marker

Use CSS to Hide the Marker: You can hide the default marker by applying the following CSS rules:

details > summary {
    list-style: none; /* Remove default list style */
}

summary::-webkit-details-marker {
    display: none; /* Hide marker in WebKit browsers (Chrome, Safari) */
}

Replacing the Marker with a Custom Icon

If you want to replace the default triangle marker with a custom icon, you can do so by using the ::before or ::after pseudo-elements. Here’s how you can implement this:

Add a Custom Marker: Use the following CSS to add a custom marker:

details > summary {
    list-style: none; /* Remove default list style */
    position: relative; /* Positioning for the custom marker */
}

summary::-webkit-details-marker {
    display: none; /* Hide marker in WebKit browsers */
}

summary::before {
    content: "►"; /* Custom marker for closed state */
    position: absolute;
    left: -20px; /* Adjust position as needed */
}

details[open] summary::before {
    content: "▼"; /* Change marker for open state */
}

Summary of CSS Rules

Hiding the Marker: Use display: none; on summary::-webkit-details-marker to hide the default marker in WebKit browsers.
Custom Markers: Use ::before or ::after to insert custom content before or after the summary text, allowing you to control the appearance of the marker.

This approach allows you to effectively manage the visibility and style of the marker in a <details> element across different browsers[1][2][4][5].

Citations:

[1] https://stackoverflow.com/questions/6195329/how-can-you-hide-the-arrow-that-is-displayed-by-default-on-the-html5-details-e

[2] https://www.otsukare.info/2016/04/19/summary-details

[3] https://blog.teamtreehouse.com/use-details-summary-elements

[4] https://www.fabiofranchino.com/log/how-to-hide-the-arrow-in-the-summary-tag-in-details-tag/

[5] https://www.eddymens.com/blog/how-to-remove-the-arrow-from-the-html-details-tag