Explore how Vue and jQuery can be used together

Vue is a popular JavaScript framework that helps you build web applications more conveniently. But sometimes, you may need to use other JavaScript libraries such as jQuery to get the specific functionality you need to better complete your web application. This article will explore how Vue and jQuery are used together.

Introducing jQuery into the Vue project
First, you need to introduce jQuery into your Vue project. You can use the npm package manager or import jQuery files directly from a CDN. Using CDN in Vue can bring jQuery into your Vue project in the following ways:

<script src="https://cdn.jsdelivr.net/npm/jquery@3.5.1/dist/jquery.min.js"></script>

Using jQuery in Vue Project
To use jQuery in a Vue project, you need to bind jQuery to Vue instance so that you can use jQuery to manipulate DOM elements and perform other operations.

To achieve this purpose, you can use Vue's life cycle hooks "mounted" and "destroyed". In the mounted hook, you can bind jQuery event handlers, and in the destroyed hook, you can remove them to avoid memory leaks before the component is removed.

The following is an example Vue component that uses jQuery to close a modal box:

<template>
  <div>
    <button @click="showModal=true">Show Modal</button>
    <div v-if="showModal" class="modal">
      <h2>Modal Title</h2>
      <p>Modal Content</p>
      <button class="modal-close-btn">×</button>
    </div>
  </div>
</template>

<script>
import $ from 'jquery';

export default {
  data() {
    return {
      showModal: false
    }
  },

  mounted() {
    // 绑定关闭模态框的事件处理程序
    $('.modal-close-btn').on('click', () => {
      this.showModal = false;
    });
  },

  destroyed() {
    // 移除关闭模态框的事件处理程序
    $('.modal-close-btn').off('click');
  }
}
</script>

<style>
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.modal h2 {
  margin-top: 0;
}

.modal-close-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 20px;
}
</style>

This component uses Vue's "data" option to track whether the modal box should appear, and uses jQuery to bind the "click" event to close the modal box. In the "mounted" hook, the event handler is bound via the selector to the "modal-close-btn" class, which is a very common CSS class that is commonly used in many different places. In the "destroyed" hook, the event handler is unbound so that no memory leak occurs until the component is destroyed.

Interaction between Vue and jQuery
Sometimes, you may need to interact between Vue and jQuery to handle DOM elements generated in Vue templates. For example, you might need to dynamically generate a table based on data in a Vue template and use jQuery to style the table.

To achieve this, you can use Vue's "ref" attribute to reference the DOM element and then pass it to jQuery for processing. Here is an example of this:

<template>
  <table ref="table"></table>
</template>

<script>
import $ from 'jquery';

export default {
  mounted() {
    // 生成表格并将其附加到DOM
    const tableData = [
      { name: 'Alice', age: 32 },
      { name: 'Bob', age: 25 },
      { name: 'Charlie', age: 47 },
    ];

    const $table = $('<table>').addClass('my-table');
    $table.append('<thead><tr><th>Name</th><th>Age</th></tr></thead>');

    const $tbody = $('<tbody>');
    tableData.forEach((row) => {
      const $tr = $('<tr>');
      $tr.append(`<td>${row.name}</td><td>${row.age}</td>`);
      $tbody.append($tr);
    });

    $table.append($tbody);

    this.$refs.table.appendChild($table[0]);
  }
}
</script>

<style>
.my-table th {
  font-weight: bold;
}
.my-table tbody tr:nth-child(even) {
  background-color: #f2f2f2;
}
.my-table td {
  padding: 10px;
  border: 1px solid #ddd;
}
</style>

In this example, we use Vue's "mounted" hook to generate a table and use jQuery to style the table. We use jQuery selectors to select table elements (which can be referenced via Vue's $refs property) and jQuery methods to add elements. Since Vue needs to manage DOM elements, we need to use native JavaScript methods to attach the table created by jQuery to the Vue template.

Conclusion
Vue and jQuery work well with each other to provide a better web application building experience. In this article, we discussed how to introduce jQuery into a Vue project and use it in Vue components, as well as how to interact between Vue and jQuery to manipulate DOM elements and perform other operations. I hope this article helped you better understand how Vue and jQuery work together.

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