The default styling provided by the library doesn't match the one provided by Drupal's default admin theme.
I suggest to add the following in the module's CSS:
.choices__list--multiple .choices__item {
color: var(--button-fg-color--primary);
background-color: var(--button-bg-color--primary);
box-shadow: 0 1px 2px rgba(0,0,0,0.25);
border-radius: var(--button-border-radius-size);
border: 1px solid transparent !important;
}.choices[data-type*=select-multiple] .choices__button, .choices[data-type*=text] .choices__button {
border-left: 1px solid transparent !important;
}
This CSS was copied from what is applied to .button--primary and .button (the transparent border part) by the Claro theme, and will produce this output:
Fixed
1.1
User interface
Issue #3359621 by robphillips, kopeboy: Claro administration theme...
Issue #3359621 by robphillips: Claro administration theme styles (fixes...
Automatically closed - issue fixed for 2 weeks with no activity.