WeChat applet implements form auto-filling function

WeChat applet realizes form automatic filling function

With the continuous development of Internet technology, mobile applications are becoming more and more popular. As a lightweight application form, WeChat applet has become an important part of people's lives. In WeChat mini-programs, forms are one of the important ways for users to interact with mini-programs. In order to improve the user experience, you can consider implementing the form auto-fill function so that users can quickly and accurately fill in relevant information when filling out the form.

Implementing the form auto-fill function mainly involves the following steps:

1. Obtain user authorization: Since auto-fill needs to obtain the user's personal information, it is necessary to obtain the user's authorization first. You can use WeChat's wx.getUserInfo interface to obtain the user's personal information and request the user's authorization.
2. Storage user information: After obtaining user authorization, the user's personal information is stored to facilitate automatic filling of subsequent forms. You can use the local storage function of the mini program to store user information in the local cache.

// 获取用户授权并存储用户信息
wx.getUserInfo({
  success: function (res) {
    var userInfo = res.userInfo; // 用户信息
    wx.setStorageSync('userInfo', userInfo); // 存储用户信息至本地缓存
  }
})

3. Form auto-fill: When a user needs to fill in a form, it can detect whether user information exists locally. If user information exists, the corresponding user information is automatically populated into the form.

// 检查本地缓存中是否存在用户信息
var userInfo = wx.getStorageSync('userInfo');
if (userInfo) {
  // 将用户信息自动填充到表单中
  this.setData({
    username: userInfo.nickName,
    gender: userInfo.gender
    // 其他表单字段
  })
}

Through the above steps, we can implement a simple form auto-fill function. It should be noted that in order to protect users' privacy, relevant laws and regulations should be observed when using user information, and users need to be informed of the purpose and scope of data use and respect users' privacy rights.

Of course, in actual applications, the form auto-fill function can be further expanded according to specific needs. For example, the most commonly used options can be automatically filled in based on the user's historical input records; or options in related regions can be automatically filled in based on the user's geographical location information.

In short, the form auto-fill function of WeChat mini program can provide users with a convenient and efficient filling experience and improve user satisfaction with the mini program. At the same time, when implementing this function, it is also necessary to fully protect user privacy and comply with relevant laws and regulations. I hope the above content will be helpful to implement the form auto-fill function of WeChat applet.

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