Vuelinksnip

// this is in the route.js file
{ path: 'user/:id', component: User},
---------------------
header has the link with the id
<router-link to="/user/10" tag="li" active-class="active"> <a>User1</a> </router-link>
---------------------------------------


// to get the id passed from the header file
<template>
<p>Loaded ID:{{id}}</p>
</template>

<script>
export default {
data(){
  return{
    id: this.$route.params.id
  }
},
// the watch is needed otherwise the id would not be updated if it changes 
// eg if you had 2 links one with 10 and one with 20 the {{id}} would not change from the 10 to 20 because the page wasn't reloaded
watch:{
 '$route'(to, from){
 this.id = to.params.id;
}
}
</script>

VueJs Routing