1. APP should be passing parameters to the page in GET mode, right? It is similar to url.html?id=5&time=3835630 . There is an API called URLSearchParams, to check the specific usage of MDN.
2. I don't understand. Please attach the effect picture of the page
.

1. Depending on how you and app transfer data, the easiest thing is to use url to pass parameters to h5, or h5 interacts with the native, which requires you to call down the app method
2. When you click, you can judge whether there is an img tag under the .num node, add it if not, and delete

can you operate directly without login authorization information?

the simplest thing is to pass values by URL, but if login authorization information is required, URL values are not appropriate (insecure). A more appropriate way is to encrypt the login authorization information and put it into HTTP HEADER.

p.s. Upstairs is Douyin is not fun, or mobile phone is not fun, unexpectedly free to answer the SF question [manual dog head?]

there is a way that you can provide a function func to pass parameters to the user id, for the client to call. Just pass in the user id when the client invokes it.

function func (userId){
    //do something 
    //
}

Baidu is OK with this. https://blog.csdn.net/cs15229.