Application program updating method and device, electronic equipment and storage medium

The invention provides an application program updating method and device, electronic equipment and a storage medium. The method comprises the following steps: downloading a JS file for logically updating an interface of a Flutter from a server; and determining a JS function in a JS file needing to be executed in response to the monitored event of the interface, executing the JS function under the assistance of a JS engine carried by the operating system to obtain an execution result of the JS function, and returning the execution result to the Flutter so as to respond to the event. Therefore, the application program only needs to automatically download the JS file used for logically updating the interface of the Flutter from the server side, and a user does not need to manually download and install a new version of application program (the new version of application program with the JS file used for logically updating the interface of the Flutter) again, so that the logic updating of the interface can be real