How to implement search box and search suggestions in Vue?

Vue is a popular JavaScript framework for quickly building modern web applications. In many web applications, search boxes are an essential part, allowing users to quickly find what they need in large amounts of data. Vue provides many tools and techniques to implement the search box and its suggestion functionality.

In this article, we will explore how to implement search boxes and search suggestions using Vue and other related technologies.

Search box component

First, let us create a search box component. This component will allow the user to enter a search query and communicate it with the backend server to obtain the corresponding search results.

The key HTML code is as follows:

<template>
  <div>
    <form @submit.prevent="submit">
      <input v-model="query" type="text" placeholder="输入查找内容" />
      <button type="submit">搜索</button>
    </form>
    <ul v-if="results.length">
      <li v-for="result in results" v-text="result"></li>
    </ul>
  </div>
</template>

The above code defines a template in which the form element contains a text input box and a submit button. The text input box uses the v-model directive to bind its value to a data attribute named query. This property will automatically update as the user enters a query.

When the user clicks the Search button, we trigger the submit method, which either makes an API request to the backend server or searches using local data. In this article, we assume that we use the axios library to make requests to the server.

import axios from 'axios'

export default {
  data() {
    return {
      query: '',
      results: []
    }
  },
  methods: {
    async submit() {
      try {
        const response = await axios.get('/search', {
          params: { q: this.query }
        })
        this.results = response.data
      } catch (error) {
        console.error(error)
      }
    }
  }
}

The above code defines a Vue component, which defines the submit method. This method gets the search results from the backend server and stores them in a data property named results.

Implementing search suggestions

Now that we have created a basic search box component, this is still difficult to use if the user is not sure what to search for. In this case, search suggestions can help users quickly understand the available search options.

We can implement search suggestions with the help of Vue's calculated properties. A computed property is a special type of data property that is dynamically calculated based on the values ​​of other data properties. In our example, we will use computed properties to calculate search suggestions.

export default {
  data() {
    return {
      query: '',
      results: [],
      suggestions: []
    }
  },
  computed: {
    async suggestedQueries() {
      if (!this.query) {
        return []
      }
      try {
        const response = await axios.get('/suggestions', {
          params: { q: this.query }
        })
        return response.data
      } catch (error) {
        console.error(error)
        return []
      }
    }
  },
  methods: {
    async submit() {
      try {
        const response = await axios.get('/search', {
          params: { q: this.query }
        })
        this.results = response.data
      } catch (error) {
        console.error(error)
      }
    }
  }
}

In the above code, we have added a new calculated property called suggestedQueries. When query changes, this property is automatically recalculated and suggested search queries are obtained from the backend server.

In order to render these suggestions to the user interface, we can modify our HTML template and add a new component with the v-for directive:

<template>
  <div>
    <form @submit.prevent="submit">
      <input v-model="query" type="text" placeholder="输入查找内容" />
      <button type="submit">搜索</button>
    </form>
    <ul v-if="suggestedQueries.length">
      <li v-for="query in suggestedQueries" v-text="query"></li>
    </ul>
    <ul v-if="results.length">
      <li v-for="result in results" v-text="result"></li>
    </ul>
  </div>
</template>

Now, when the user enters the query , we'll automatically get and display search suggestions. When the user clicks an item in the suggestions, that item becomes the value in the text box and a query is immediately submitted. Using this approach, we help users find what they need quickly and provide an intuitive, easy-to-use interface.

Conclusion

Vue provides many tools and techniques to implement the search box and its suggestion functionality. Using them, it is no longer difficult to implement an efficient and pleasant search function. In practice, you may encounter challenges such as how to handle large data sets or how to communicate with backend servers. However, the Vue framework provides many tools and libraries to solve these problems, helping you easily build applications with an excellent search experience.

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