How to use Vue to implement folding menu effects

How to use Vue to implement folding menu effects

Introduction:
In web development, folding menu is a common and very practical interactive effect. Vue is a popular JavaScript framework that provides a simple and flexible way to implement collapse menu effects. This article will introduce how to use Vue to implement a basic folding menu and provide specific code examples.

1. Basic HTML structure
   First, we need to set up a basic HTML structure to accommodate the collapsible menu. The following is a simple sample code:

<div id="app">
  <div class="menu">
    <div class="menu-header" @click="toggleMenu">
      <h3>菜单标题</h3>
      <span class="icon" :class="{ 'open': isOpen }"></span>
    </div>
    <div class="menu-content" v-show="isOpen">
      <!-- 菜单内容 -->
    </div>
  </div>
</div>

2. Creation and initialization of Vue instance
   Next, we will create a Vue instance and initialize related data and methods. The following is a simple sample code:

new Vue({
  el: '#app',
  data: {
    isOpen: false
  },
  methods: {
    toggleMenu() {
      this.isOpen = !this.isOpen;
    }
  }
});

In the above code, we create a Vue instance and define an isOpen data attribute to represent the open status of the menu. The toggleMenu method is used to switch the display/hidden state of the menu.

3. Style settings
   In order to make the collapse menu work properly, we also need to add some basic CSS styles. The following is a simple sample code:

.menu {
  border: 1px solid #ccc;
}

.menu-header {
  background-color: #f0f0f0;
  padding: 10px;
  cursor: pointer;
}

.menu-header:hover {
  background-color: #e0e0e0;
}

.menu-header h3 {
  margin: 0;
}

.menu-header .icon {
  float: right;
  width: 20px;
  height: 20px;
  background-color: #ccc;
  transition: transform 0.3s ease-in-out;
}

.menu-header .icon.open {
  transform: rotate(180deg);
}

.menu-content {
  padding: 10px;
  display: none;
}

In the above code, we set the basic style of the menu. The background color will change when the mouse is hovering over the menu title. The arrow icon to the right of the menu title will rotate based on the open/closed state of the menu.

4. Run results
   After running the above code, you will see a menu with a basic folding effect. Click on the menu title and the menu content will expand/collapse.

Summary:
This article introduces how to use Vue to implement folding menu effects and provides specific code examples. Through Vue's data binding and event binding mechanism, we can easily implement the menu's expand/collapse function and increase the interactive effect through CSS styles. I hope this article can help you understand the use of Vue and implement folding menu effects.

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