How to make pagination? - vue.js

Question

How to make pagination. I tried many times already, but I can’t do it. I have to paginate without Laravel. The problem is that I can not make a cycle that will display the number of pages, each page should have 10 posts, and there are 98 posts in total. I made the property to be calculated, thanks to which you can find out how many pages there will be. I made a page switch that works. But for some reason, the cycle with which I will display the number of pages does not work for me, I cannot understand what the problem is?
Screenshot
My Vue js:
import axios from 'axios';
export default {
name: 'app',
data () {
return{
counter: 1,
zero: 0,
posts: [],
createTitle: '',
createBody: '',
visiblePostID: '',
}
},
watch: {
counter: function(newValue, oldValue) {
this.getData()
}
},
created(){
this.getData()
},
computed: {
evenPosts: function(posts){
return Math.ceil(this.posts.length/10);
}
},
methods: {
getData() {
axios.get(`http://jsonplaceholder.typicode.com/posts?_start=${this.counter}+${this.zero}&_limit=10`).then(response => {
this.posts = response.data
})
},
// even: function(posts) {
// return Math.ceil(this.posts.length/10)
// },
deleteData(index, id) {
axios.delete('http://jsonplaceholder.typicode.com/posts/' + id)
.then(response => {
console.log('delete')
this.posts.splice(index, 1);
})
.catch(function(error) {
console.log(error)
})
},
addPost() {
axios.post('http://jsonplaceholder.typicode.com/posts/', {
title: this.createTitle,
body: this.createBody
}).then((response) => {
this.posts.unshift(response.data)
})
},
changePost(id, title, body) {
axios.put('http://jsonplaceholder.typicode.com/posts/' + id, {
title: title,
body: body
})
},
},
}
My html:
<div id="app">
<div class="smallfon">
<div class="blocktwitter"><img src="src/assets/twitter.png" class="twitter"/></div>
<div class="addTextPost">Add a post</div>
<input type="text" v-model="createTitle" class="created"/>
<input type="text" v-model="createBody" class="created"/>
<div><button #click="addPost()" class="addPost">AddPost</button></div>
<div class="post1">
<div class="yourPosts">Your Posts</div>
<ul>
<li v-for="(post, index) of posts" class="post">
<p><span class="boldText">Title:</span> {{ post.title }}</p>
<p><span class="boldText">Content:</span> {{ post.body }}</p>
<button #click="deleteData(index, post.id)" class="buttonDelete">Delete</button>
<button #click="visiblePostID = post.id" class="buttonChange">Change</button>
<div v-if="visiblePostID === post.id" class="modalWindow">
<div><input v-model="post.title" class="changePost"><input v-model="post.body" class="changePost"></div>
<button type="button" #click="changePost(post.id, post.title, post.body)" class="apply">To apply</button>
</div>
</li>
</ul>
<button type="button" #click="counter -=1" class="prev">Предыдущая</button>
<!-- <div class="counter">{{ counter }}</div> --> <span v-for="n in evenPosts" :key="n.id">{{ n }} </span>
<button type="button" #click="counter +=1" class="next">Следущая</button>
<!-- <span v-for="n in evenPosts" :key="n.id">{{ n }} </span> -->
</div>
</div>
</div>

Answer 1

If you bind a limit to your fetching request (axios.get(...&_limit=10)), you can't return a paginate count because your computed evenPost property will always return 1 i.e Math.ceil(10/10) == 1
To fix your pagination, remove the parameters query to get the data:
getData() {
axios.get('https://jsonplaceholder.typicode.com/posts').then(response => {
this.posts = response.data
})
}
Then change the default counter page to 0 and add a computed property to return 10 posts based on it:
data () {
return {
counter: 0,
//...
}
},
computed: {
paginatedPosts() {
const start = this.counter * 10;
const end = start + 10;
return this.posts.slice(start, end);
}
}
Now you can iterate on this property:
<ul>
<li v-for="(post, index) of paginatedPosts" class="post">
...
</li>
</ul>
Basic live example