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How to use Vue to implement a WeChat-like login page?

王林
王林Original
2023-06-25 09:42:572113browse

With the rapid development of mobile Internet, many people use WeChat for network communication, personal information exchange, etc. Therefore, in order to facilitate user authentication, many websites and applications provide the function of logging in using a WeChat account. In this article, we will introduce how to use Vue to manually implement a WeChat-like login page.

Preparation

Before we start writing code, we need to do some preparations.

First, we need to install and configure Vue.js and webpack. You can visit the official websites of [Vue.js](https://www.vuejs.org/) and [webpack](https://webpack.js.org/) for more information.

Secondly, in order to imitate the WeChat login page, we need some styles and pictures. You can log in to your WeChat account, open the WeChat web version, and then view the page elements and styles through the developer tools to obtain the required information.

Finally, we need to create a basic Vue.js application. Here is sample code for a simple Vue application: 

<!DOCTYPE html>
 <html>
 <head>
     <meta charset="utf-8">
     <title>Vue.js Application</title>
 </head>
 <body>
     <div id="app">
         <h1>{{ message }}</h1>
     </div>
     <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/vue"></script>
     <script type="text/javascript">
         var app = new Vue({
             el: '#app',
             data: {
                 message: 'Hello, Vue.js!'
             }
         });
     </script>
 </body>
 </html>

Run this application and you will see a page with a title of "Hello, Vue.js!" This indicates that you have Vue.js set up.

Create a login page

The first step is to create an HTML file in which you add the required elements and styles. The following is sample HTML code for a basic login page: 

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>仿微信登录页面</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div id="app">
        <div class="login-panel">
            <img class="logo-image" src="path/to/wechat/logo.png" alt="微信 Logo">
            <h1 class="login-title">欢迎回来</h1>
            <input type="text" class="login-input" placeholder="请输入微信账号">
            <input type="password" class="login-input" placeholder="请输入密码">
            <button class="login-button">登录</button>
            <p class="login-msg">还没有账号？<a href="#">马上注册</a></p>
        </div>
    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script src="app.js"></script>
</body>
</html>

In this code, we define a simple Document Object Model (DOM) structure, including a div element, It serves as the root element of a Vue.js application. The div element is nested with a div element with the WeChat logo, title, input box, login button and registration link, which is the main content of the entire login page.

Next, we need to add the required styles in the style.css file. The following is a sample code for styles: 

body {
    background-color: #f1f1f1;
}

#app {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-panel {
    background-color: #ffffff;
    width: 400px;
    height: 500px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
    border-radius: 5px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.logo-image {
    width: 100px;
    margin-top: 50px;
}

.login-title {
    font-size: 24px;
    margin-top: 20px;
}

.login-input {
    width: 280px;
    height: 40px;
    border: none;
    border-bottom: 1px solid #d1d1d1;
    margin-top: 20px;
    font-size: 16px;
    outline: none;
}

.login-button {
    width: 280px;
    height: 40px;
    border: none;
    border-radius: 20px;
    margin-top: 20px;
    color: #ffffff;
    font-size: 16px;
    cursor: pointer;
    background-color: #4caf50;
}

.login-button:hover {
    background-color: #3e8e41;
}

.login-msg {
    margin-top: 20px;
    font-size: 14px;
}

.login-msg a {
    color: #4caf50;
    text-decoration: none;
}

In this code, we define some basic styles, such as background color, font, input box, login button, etc. At the same time, we also added the WeChat logo and some beautiful CSS transitions, button animations and mouse pointer styles.

Complete code

Finally, we need to add the JavaScript code of the Vue.js application in the app.js file. Here is an example of that code: 

new Vue({
    el: '#app',
    data: {
        username: '',
        password: ''
    },
    computed: {
        canSubmit: function() {
            return this.username !== '' && this.password !== '';
        }
    },
    methods: {
        login: function() {
            if (this.canSubmit) {
                alert('登录成功');
            } else {
                alert('请输入您的微信账号和密码');
            }
        }
    }
});

In this code, we define a Vue.js application that will be bound to the app element. We also define some data and methods to implement the login process. Specifically:

  • username and password are two data attributes used to store usernames and passwords.
  • canSubmit is a calculated property that determines whether the login button can be activated based on whether the username and password are filled in.
  • login method will perform the login operation. If it can be submitted, this method will pop up a warning box to prompt the user to log in successfully. Otherwise, it will display a prompt box prompting the user to enter their username and password.

Please visit the following [CodePen](https://codepen.io/Irving-ywd/pen/WNrXeBj) link to view the final effect.

Summary

In this tutorial, we introduced how to use Vue.js to manually implement a WeChat-like login page. We first created an HTML file and added the required styles. We then used Vue.js to create an application that contained data and computed properties, as well as methods to implement login functionality.

While we show here a simpler approach to implementing a login page, you can use this approach to build your own login system for more complex authentication and authorization scenarios. At the same time, we also hope that this tutorial will help you learn how to use Vue.js to create dynamic user interfaces in front-end development.

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