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<template>
    <button class="btn btn-sm btn-primary" v-on:click="togglefav" ><i v-bind:class="[is_fav ?  'fa-heart' : 'fa-heart-o', 'fa']" aria-hidden="true"></i></button>
</template>
 
<script>
export default {
    props:['is_fav'],
    methods:{
      togglefav:function(){
        this.$emit('togglefav',!this.is_fav);
      }
    }
}
</script>