How to enable pagination on vertically aligned Angular Material tabs (mat-tabs)? - css

Question

I arranged my angular material tabs vertically using CSS. Unfortunately, the pagination to navigate to the invisible tabs is not displayed
My container has a fixed height (max-height: 177px) so that only a certain number of tabs are visible. The pagination should appear when this fixed height is exceeded.
Here is my CSS / SCSS for the vertical tabs:
:host ::ng-deep {
.mat-tab-group {
flex-direction: row-reverse;
.mat-tab-nav-bar,
.mat-tab-header {
border: 0;
}
.mat-tab-header {
display: flex;
align-items: flex-end;
max-height: 177px;
right: 50px;
bottom: 50px;
z-index: 2147483647;
.mat-tab-labels {
flex-direction: column;
background: gray;
.mat-tab-label {
margin: 0;
padding: 20px;
cursor: pointer;
&:not(:last-child) {
border-bottom: 1px solid white;
}
&.mat-tab-label-active {
background-color: white !important;
width: 100%;
}
}
}
}
.mat-tab-body-wrapper {
width: 100%;
height: 100%;
display: table;
}
}
}
My template is structured like this:
<content>
<div class="main-wrapper i-wrapper">
<div class="header">
<div class="title">
<h4>Title</h4>
</div>
</div>
<mat-tab-group mat-align-tabs="end">
<div *ngFor="let item of items; let i = index">
<mat-tab label="{{i}}">
<div class="device-map-container">
<div class="device-map">
<img id="img_equipment" [src]="apiUrl + '/path/to/svg/' + asset | sanitize">
<a *ngFor="let data of SVGdata"
title="{{ data.title }}"
class="device-link">
</a>
<div class="wrapper">
<!-- another angular component -->
</div>
</div>
</div>
</mat-tab>
</div>
</mat-tab-group>
</div>
</content>
In dev tools the templates looks like this:
<mat-tab-group _ngcontent-nnd-c412="" mat-align-tabs="end" animationduration="0ms" class="mat-tab-group mat-primary" ng-reflect-animation-duration="0ms">
<mat-tab-header class="mat-tab-header" ng-reflect-selected-index="0" ng-reflect-disable-ripple="false" ng-reflect-disable-pagination="false">
<div aria-hidden="true" mat-ripple="" class="mat-ripple mat-tab-header-pagination mat-tab-header-pagination-before mat-elevation-z4 mat-tab-header-pagination-disabled" ng-reflect-disabled="true">
<div class="mat-tab-header-pagination-chevron"></div>
</div>
<div class="mat-tab-label-container">
<div role="tablist" class="mat-tab-list" style="transform: translateX(0px);">
<div class="mat-tab-labels">
<div role="tab" mattablabelwrapper="" mat-ripple="" cdkmonitorelementfocus="" class="mat-ripple mat-tab-label mat-focus-indicator mat-tab-label-active ng-star-inserted" id="mat-tab-label-0-0" ng-reflect-disabled="false" tabindex="0" aria-posinset="1" aria-setsize="2" aria-controls="mat-tab-content-0-0" aria-selected="true" aria-disabled="false">
<div class="mat-tab-label-content">
</div>
</div>
<div role="tab" mattablabelwrapper="" mat-ripple="" cdkmonitorelementfocus="" class="mat-ripple mat-tab-label mat-focus-indicator ng-star-inserted" id="mat-tab-label-0-1" ng-reflect-disabled="false" tabindex="-1" aria-posinset="2" aria-setsize="2" aria-controls="mat-tab-content-0-1" aria-selected="false" aria-disabled="false">
<div class="mat-tab-label-content">
</div>
</div>
</div>
<mat-ink-bar class="mat-ink-bar" style="visibility: visible; left: 0px; width: 50px;"></mat-ink-bar>
</div>
</div>
<div aria-hidden="true" mat-ripple="" class="mat-ripple mat-tab-header-pagination mat-tab-header-pagination-after mat-elevation-z4 mat-tab-header-pagination-disabled" ng-reflect-disabled="true">
<div class="mat-tab-header-pagination-chevron"></div>
</div>
</mat-tab-header>
<div class="mat-tab-body-wrapper">
<mat-tab-body role="tabpanel" class="mat-tab-body ng-tns-c380-10 mat-tab-body-active ng-star-inserted" id="mat-tab-content-0-0" ng-reflect-_content="[object Object]" ng-reflect-position="0" ng-reflect-origin="1" ng-reflect-animation-duration="0ms" aria-labelledby="mat-tab-label-0-0">
<div class="mat-tab-body-content ng-tns-c380-10 ng-trigger ng-trigger-translateTab" style="transform: none;">
<div _ngcontent-nnd-c412="" class="device-map-container ng-star-inserted" style="">
<div _ngcontent-nnd-c412="" class="device-map">
<img _ngcontent-nnd-c412="" id="img_equipment" alt="" src="data:image/svg+xml;base64,...">
</div>
</div>
</div>
</mat-tab-body>
<mat-tab-body role="tabpanel" class="mat-tab-body ng-tns-c380-11 ng-star-inserted" id="mat-tab-content-0-1" ng-reflect-_content="[object Object]" ng-reflect-position="1" ng-reflect-animation-duration="0ms" aria-labelledby="mat-tab-label-0-1">
<div class="mat-tab-body-content ng-tns-c380-11 ng-trigger ng-trigger-translateTab" style="transform: translate3d(100%, 0px, 0px); min-height: 1px;">
<!--container-->
</div>
</mat-tab-body>
</div>
</mat-tab-group>
Currently it looks like this (6 elements are visible. But there are more than 6 tabs in the container):