...Mock interface, page, etc. Modify the content of the request and response, for example, insert script in the page, modify the return header, etc. Start LightProxy in the application list. The first time you start LightProxy, you will be asked for the password twice. This is used to install auxiliary programs and automatically install certificates. We will complete a JSON rule through snippet, and we can quickly jump through Tab. The usage of ES6-like strings here is a grammar extended on the basis of whistle, which can support multiple lines of content written directly into the rules.