1. Quickly look at the function of sending a request. F12 selects the request in the network, and looks at the response on the right. What is returned is what it does, and you can see the parameters where you look at the parameters. The information between different browsers is different and can complement each other.
And after clicking the button to see the request issued, you can directly use the network to see the calling request, without having to find it in the code
2, the use of browser tools, the time when the request is issued, see the timeline