after install use it with those params (many others in summernote documentation):
<vue-summernote-slim :ref="name" :name="name" :placeholder="placeholder" :height="height" :minHeight="minHeight" :maxHeight="maxHeight" :focus="focus" :class="classes"
remember to setup props, watch (to get starting value on edit form), and on mounted to get content typed, for example:
this.summernote.$on('onChange', function (contents) { this.$emit('input', contents) })