How to traverse background data using vue

In front-end development, we need to obtain data from the back-end and display it on the page. The common way is to traverse the data. As a very excellent front-end framework, Vue.js also provides us with many convenient methods in data processing. Below, I will introduce how to use Vue.js to traverse background data.

First of all, we need to make it clear: how to obtain background data. You can use the Axios plugin for Vue.js, which can request data and return it to us. The following is the basic usage of Axios:

import axios from 'axios'

axios.get('url').then(res => {
  console.log(res.data)
})

The url here is the backend interface address. We initiate a GET request to the backend through the axios.get() method, and Accept background data through the .then() method, and finally print it out on the console.

Next, we need to display the obtained data on the page. Vue.js provides a very practical instruction v-for, which can traverse arrays or objects and display the data on the page. The following is the basic usage of v-for:

<ul>
  <li v-for="(item, index) in list" :key="index">{{ item.title }}</li>
</ul>

The list here is the background data, we use v-for to process it Traverse and display the title in each traversed item on the page. It should be noted that the :key attribute must be added when using v-for, otherwise a rendering error will occur.

To sum up, we can use Vue.js to traverse the background data according to the above method. The complete code is as follows:

<template>
  <div>
    <ul>
      <li v-for="(item, index) in list" :key="index">{{ item.title }}</li>
    </ul>
  </div>
</template>

<script>
import axios from 'axios'

export default {
  data() {
    return {
      list: []
    }
  },
  created() {
    axios.get('url').then(res => {
      this.list = res.data
    })
  }
}
</script>

In this code, we use the created() life cycle. After obtaining the background data, store the data in list, And traverse it through the v-for instruction in the page.

In short, Vue.js provides us with a very convenient data processing method. As long as we master these methods, we can conveniently process background data in front-end development and achieve our needs.

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