Detailed explanation of how to jump back to applets in webview

Preface

In WeChat applet, when you useweb-viewWhen components are embedded in a web page, sometimes you may need to jump back to the applet from the web page. This usually involves the coordination between the front-end and the back-end, but mainly the front-end work. Here are some suggested steps to implement this feature:

1. Use WeChat JS-SDK

First, make sure that your web page has correctly introduced the WeChat JS-SDK and has obtained a valid signature, nonce certificate identifier (nonceStr) and timestamp through the backend. These parameters are necessary conditions for calling the WeChat JS interface.

2. Configure the JS interface security domain name of the web page

On the WeChat public platform (or open platform), find your applet settings and make sure you have added the web page's domain name to the JS interface security domain name list. This is to ensure that your web page can safely call the WeChat JS interface.

3. Call the WeChat JS interface and jump back to the applet

In your web page, you can use the WeChat JS-SDK provided byorMethod to jump back to the applet. These two methods are used to restart the applet and switch to a tab page of the applet respectively.

For example:

({
  beta: true, // This must be written, for calling API  debug: false, // Turn on debug mode  appId: 'Your applet appid', // Required, applet appId  timestamp: 'Your timestamp', // Required to generate a signature time stamp  nonceStr: 'Your nonceStr', // Required to generate a random string of signatures  signature: 'Your signature', // Required, signature  jsApiList: ['chooseWXPay', 'miniProgram'] // Required, list of JS interfaces to be used});

(function () {
  // Call the API here  ({
    url: '/pages/index/index' // The path of the mini program page that needs to be redirected  });
});

Notice:InappId、timestamp、nonceStrandsignatureNeed to get it from your backend server and make sure they are valid.

4. Handle exceptions

Remember to handle possible exceptions, such as signature errors, API call failures, etc. You can useFunctions to catch these errors.

5. Testing and debugging

Finally, make sure to test your implementation in different devices and network environments to make sure it works properly. Using WeChat's developer tools can help you debug more easily.

Please note that the API and policies of the WeChat platform may change at any time, so it is recommended to check the official documentation frequently for the latest information and sample code.

Summarize

This is the article about how to jump back to the mini program in a webview. For more related webview content, please search for my previous articles or continue browsing the related articles below. I hope everyone will support me in the future!