without corresponding v-if.
vue.common.js:521 [Vue warn]: class="btn btn-{{type}} dropdown-toggle": Interpolation inside attributes has been removed. Use v-bind or the colon shorthand instead. For example, instead of
, use
.
vue.common.js:521 [Vue warn]: Failed to resolve directive: el
(found in anonymous component - use the "name" option for better debugging messages.)

sorry for being late.
maybe you're using a older version? sounds like a bug that was fixed a lot of time ago, and in the last change looks fine... no more changes since 3 months ago.