How to do Lenovo search in vue

With the continuous development of Internet technology, search engines have become an important channel for people to obtain information. In software engineering, the application of search engine technology is becoming more and more widespread. For example, when developing a website or application, we usually need to implement some form of search function to help users quickly find the information they need.

In current front-end technology, Vue.js is a very popular JavaScript framework. It adopts the MVVM pattern and has functions such as responsive data binding and componentization. If you need to implement search functionality in Vue.js, how should you do it? This article will introduce the entire process from Lenovo search to data rendering.

1. Implement Lenovo search

Before implementing the search function, we first need to understand Lenovo search. Associative search means that during the process of entering keywords, as the input content continues to change, the system will automatically prompt relevant search results, so that users can find target information more quickly.

For monitoring search box input events, you can use the v-model directive in Vue.js. When the user enters text, the v-model directive will bind the value of the input box to the data attribute of the Vue instance, and the bound data will be automatically updated each time the user enters text.

We can monitor the input event to display Lenovo search results during input. The specific implementation is as follows:

<template>
  <div>
    <input v-model="keyword" @input="debounce" />
    <ul v-show="results.length">
      <li v-for="(item, index) in results" :key="index">{{ item }}</li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      keyword: '',
      results: []
    }
  },
  methods: {
    debounce() {
      // 对搜索请求进行防抖处理，避免频繁请求
      clearTimeout(this.timer)
      this.timer = setTimeout(() => {
        this.getResults()
      }, 500)
    },
    getResults() {
      // 发送搜索请求，获取联想搜索结果
      fetch('/search?q=' + this.keyword)
        .then(res => res.json())
        .then(data => {
          this.results = data.results
        })
    }
  }
}
</script>

In the above code, we use the debounce function to debounce the input event. This can effectively avoid frequent search requests caused by users typing too fast and reduce the pressure on the server. In the getResults function, we send a request through the fetch API to obtain the Lenovo search results. Save the search results in the results attribute of the Vue instance, and then directly bind the results attribute in the template to display the predictive search results.

2. Implement data rendering

Through the above steps, we have implemented the Lenovo search function. Next, we need to bind the search results with actual data to achieve dynamic rendering of the results. Considering that search results are generally displayed in the form of a list, we can use componentization to complete this part of the function.

First, we need to write a data component to manage the actual data. In this component, we can use props to accept parameters passed by other components, and then obtain and initialize the data through the data and mounted life cycle functions.

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

<script>
export default {
  props: {
    keyword: {
      type: String,
      required: true
    }
  },
  data() {
    return {
      list: []
    }
  },
  mounted() {
    // 根据关键词加载实际数据
    this.loadData()
  },
  methods: {
    loadData() {
      fetch('/data?q=' + this.keyword)
        .then(res => res.json())
        .then(data => {
          this.list = data.list
        })
    }
  }
}
</script>

In the above code, we use props to accept keyword parameters and obtain and initialize data through the loadData function. Save the obtained data in the list attribute of the Vue instance, and then directly bind the list attribute in the template to complete the rendering of the actual data.

Next, we need to realize the linkage between the data component and the search component through the parent component. The specific implementation method is to monitor changes in the keyword variable in the parent component and pass the variable to the data component.

<template>
  <div>
    <SearchBox @search="onSearch" />
    <DataList :keyword="keyword" />
  </div>
</template>

<script>
import SearchBox from './SearchBox.vue'
import DataList from './DataList.vue'

export default {
  components: {
    SearchBox,
    DataList
  },
  data() {
    return {
      keyword: ''
    }
  },
  methods: {
    onSearch(keyword) {
      this.keyword = keyword
    }
  }
}
</script>

In the above code, we use the SearchBox and DataList components. Listen to the search event in the SearchBox through the @search event, and then pass the search keywords to the DataList component. In this way, when the search keyword changes, it will trigger the change of the keyword attribute in the DataList, thus automatically updating the search results.

3. Summary

Through the above introduction, we can see that implementing the search function in Vue.js is not a very complicated matter. Use the v-model directive to monitor search box input events, and then use the fetch API to send a request to obtain search results. In terms of data rendering, we can use componentization to achieve dynamic rendering of actual data. Finally, the data component and the search component are linked through the parent component to achieve a complete search function.

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