Detailed explanation of how vue implements mouse hover display expansion effect

Vue.js is one of the most popular JavaScript frameworks currently. It is designed to build large single-page applications and is easy to use and learn. When you are building an application like this, you may want to add various interactive elements to enhance the user experience. Mouseover display expansion is one of them.

In this article, we will discuss how to implement the mouseover display expansion effect in the Vue.js framework.

Step 1: Install Vue.js

To start using Vue.js, you need to install it in your application. You can add the following code at the head or bottom of the page (you can download the Vue.js file through CDN or download):

<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/vue"></script>

Step 2: Create a Vue.js instance

In Vue. In js, all components are instances of Vue. Therefore, we need to create a Vue.js instance and then bind it to the HTML element:

<div id="app">
  // 在这里，我们会添加Vue.js效果
</div>

We also need to create a Vue.js instance in the JavaScript file:

var app = new Vue({
  el: '#app',
  data: {
    message: 'Hello Vue!'
  }
})

Step 3 :Add content to display

We will display some content when the mouse is hovering over the element. Therefore, we need to add content in the HTML tag:

<div id="app">
  <p v-show="show">a lot of details will be shown here</p>
</div>

Step 4: Add mouseover event

We need to show expanded content on mouseover. In Vue.js, we can achieve this function by adding event listeners:

<div id="app">
  <div v-on:mouseover="show=true"
       v-on:mouseleave="show=false">
    Hover the mouse here to show the details!
    <p v-show="show">a lot of details will be shown here</p>
  </div>
</div>

Here, we have added two event listeners, v-on:mouseover and v-on:mouseleave. When the mouse hovers over the element, the value of the show variable will be set to true, thus displaying the expanded content. When the mouse leaves, the value of the show variable will be set to false, thus hiding the expanded content.

Step 5: Define the variable

We need to define the variable firstshow, otherwise Vue.js will report an error when trying to read the variable for the first time. In Vue.js, we can use the data option to define variables:

var app = new Vue({
  el: '#app',
  data: {
    show: false
  }
})

Through the above 5 steps, we can achieve the mouse-over display expansion effect. The complete HTML code is as follows:

  
    
    <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/vue"></script>
  
  
    

      

        Hover the mouse here to show the details!
        
a lot of details will be shown here
      
    
    
  

I hope this article can help you achieve the mouse-over display expansion effect!

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