How to use Vue and Element-UI to implement data filtering and search functions

How to use Vue and Element-UI to implement data filtering and search functions

In modern web development, data filtering and search functions are very common and important requirements. Vue and Element-UI are currently very popular front-end frameworks. They provide many powerful tools and components that can help us easily implement data filtering and search functions. This article will introduce how to use Vue and Element-UI to implement these functions, and provide detailed code examples.

First, we need to prepare a list to display data. We can use Vue components to implement this list. Suppose we have an array called "items" that contains the data we want to display and filter. We can use the v-for directive to iterate through this array and render each array item into a list item. The code is as follows:

<template>
  <div>
    <ul>
      <li v-for="item in filteredItems" :key="item.id">{{ item.name }}</li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [
        { id: 1, name: 'Apple' },
        { id: 2, name: 'Banana' },
        { id: 3, name: 'Cherry' },
        // ...
      ],
      searchKeyword: '',
    };
  },
  computed: {
    filteredItems() {
      // 根据搜索关键字和其他筛选条件过滤数组
      return this.items.filter(item => {
        // 如果搜索关键字为空，返回所有数据
        if (this.searchKeyword === '') {
          return true;
        }
        // 如果条件成立，返回满足条件的数据
        return item.name.toLowerCase().includes(this.searchKeyword.toLowerCase());
      });
    },
  },
};
</script>

In the above code, we use the computed attribute to calculate filteredItems, which filters the items array based on search keywords and other filter conditions. In the template, we use the v-for directive to iterate through the filteredItems array and render each array item into a list item.

Next, we need to add an input box to allow users to enter search keywords. We can use the Input component provided by Element-UI to implement this input box. The code is as follows:

<template>
  <div>
    <el-input v-model="searchKeyword" placeholder="请输入搜索关键字"></el-input>
    <ul>
      <li v-for="item in filteredItems" :key="item.id">{{ item.name }}</li>
    </ul>
  </div>
</template>

<script>
export default {
  // ...
};
</script>

In the above code, we use the v-model directive to bind the value of the input box to the searchKeyword. When the user enters a search keyword, the value of searchKeyword is updated.

Finally, we can add some additional filtering conditions so that users can further filter the data based on these conditions. We can use the Checkbox component provided by Element-UI to implement these additional filtering conditions. The code is as follows:

<template>
  <div>
    <el-input v-model="searchKeyword" placeholder="请输入搜索关键字"></el-input>
    <el-checkbox-group v-model="selectedOptions">
      <el-checkbox label="Option 1"></el-checkbox>
      <el-checkbox label="Option 2"></el-checkbox>
      <el-checkbox label="Option 3"></el-checkbox>
      <!-- ... -->
    </el-checkbox-group>
    <ul>
      <li v-for="item in filteredItems" :key="item.id">{{ item.name }}</li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // ...
      selectedOptions: [],
    };
  },
  computed: {
    filteredItems() {
      // 根据搜索关键字和其他筛选条件过滤数组
      return this.items.filter(item => {
        // 如果搜索关键字为空，返回所有数据
        if (this.searchKeyword === '') {
          return item.selectedOptions.length === 0;
        }
        // 如果条件成立，返回满足条件的数据
        return (
          item.name.toLowerCase().includes(this.searchKeyword.toLowerCase()) &&
          this.selectedOptions.every(option => item.selectedOptions.includes(option))
        );
      });
    },
  },
};
</script>

In the above code, we use the v-model directive to bind the value of the Checkbox component to the selectedOptions array. When the user checks an option, the value of selectedOptions will be updated.

At this point, we have implemented the data filtering and search functions. Users can enter search keywords through the input box and check additional filtering conditions to filter the displayed data. Using Vue and Element-UI, we can easily implement these functions. I hope the sample code in this article is helpful to you!

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