Ensure Material Select Always Displays Scrollbar

I'm currently involved in a project using Angular 9 and Material design with SCSS stylesheets.

One issue I am facing is with a Material select element that contains numerous options, requiring users to scroll through them. The problem is that unless the user actively scrolls, they may not realize there are more options available. I want to address this by ensuring that the scroll bar is always visible.

How can I achieve this requirement for the material select element? I assume I will need to employ some specific style changes, especially considering the use of SCSS stylesheets.

Currently, this is what the situation looks like:

https://i.sstatic.net/n3uVA.png

I aim to have the scroll bar always displayed, rather than only appearing when the user manually scrolls down the list: https://i.sstatic.net/KsVFt.png

A live example demonstrating the issue can be found at: https://stackblitz.com/edit/always-show-scroll-material-select

cssangularsassangular-material

Answer №1

The scrollbar may not be appearing on your screen if you are using a trackpad or magic mouse. To display the scrollbar in such cases, try connecting an external mouse and set the "overflow" property to either "auto" or "scroll".

If you prefer to show the scrollbar even when using a trackpad or magic mouse, you can utilize the -webkit-scrollbar pseudo-element as described in this post: How to Display Scrollbars for MacOS Trackpad Users in WebKit/Blink

To achieve this for your specific situation, you can add the following CSS lines:

::ng-deep .mat-select-panel::-webkit-scrollbar {
    -webkit-appearance: none;
}

::ng-deep .mat-select-panel::-webkit-scrollbar:vertical {
    width: 11px;
}

::ng-deep .mat-select-panel::-webkit-scrollbar:horizontal {
    height: 11px;
}

::ng-deep .mat-select-panel::-webkit-scrollbar-thumb {
    border-radius: 8px;
    border: 2px solid white; /* should match background, cannot be transparent */
    background-color: rgba(0, 0, 0, .5);
}

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