How to redirect in Vue.js to different url when clicked?

I'm making a post board with Vue.js and trying to make the page redirected when each post is clicked.

I've installed vue-route and axios.

In index.js,

export default new Router({
  route: [
    {
      path: '/',
      name: 'Post',
      component: Post
    },
    {
      path: '/:req_no',
      name: 'Detail',
      component: Detail
    },
  ]
})

In post.vue

<div @click="detailPost(post.no)">{{post.title}}</div>

.
.
.

detailPost(req_no) {
    this.$router.push({
    path: `https://dataURL/detail.php/${req_no}`
        })
      }

In Detail.vue

<template>
    <div>
        {{contents}}
    </div>
</template>

<script>
import axios from 'axios';
export default {
    name: 'Datail',
    data() {
        return {
            req_no: this.$route.params.req_no,
            contents: {}
        }
    },
    created() {
      axios.get('https://dataURL/detail.php/', {
        params: {
          req_no: this.req_no
        }
      }).then(res => {
          this.contents = this.res.data
      });
    }
}
</script>

I'm not sure where to put the url (in the function in post.Vue, detailPost() or in Detail.vue)

If I put it in the function, I get http://localhost:8080/#/http://dataURL/detail.php/2

The API guide says I must use the params.

Could you please help me where to fix? Thanks alot!!