Voting

<div class="voting">
<!-- Up button -->
<button class="voting__button">
<div class="voting__triangle voting__triangle--up"></div>
</button>
<!-- Number -->
<div class="voting__number">
...
</div>
<!-- Down button -->
<button class="voting__button">
<div class="voting__triangle voting__triangle--down"></div>
</button>
</div>
.voting {
border: 1px solid rgba(0, 0, 0, 0.3);
border-radius: 0.25rem;
display: flex;
flex-direction: column;
height: 8rem;
}
.voting__button {
/* Reset */
background: none;
border: none;
cursor: pointer;
/* Size */
height: 1rem;
/* Position the triangle */
position: relative;
}
.voting__triangle {
border-style: solid;
/* Size */
height: 0;
width: 0;
}
.voting__triangle--up {
border-color: transparent transparent rgba(0, 0, 0, 0.3);
border-width: 0 0.5rem 0.5rem;
}
.voting__triangle--down {
border-color: rgba(0, 0, 0, 0.3) transparent transparent;
border-width: 0.5rem 0.5rem 0px;
}
.voting__number {
/* Take the available height */
flex: 1;
/* Center the number */
align-items: center;
display: flex;
justify-content: center;
/* Spacing */
padding: 0.25rem;
}
900

See also

Spin button

-
+

Stepper input

Triangle buttons