quill-placeholder-module/dist/toolbar.css

Quill module for inserting placeholders

.ql-picker.ql-placeholder {
  width: 118px;
}

.ql-picker.ql-placeholder > span.ql-picker-label::before {
  content: 'Placeholders';
}

.ql-picker.ql-placeholder > span.ql-picker-options > span.ql-picker-item::before {
  content: attr(data-label);
}