Use js to determine whether the page is loaded and implement the code_Basic knowledge

Use the document.onreadystatechange method to monitor state changes,
and then use document.readyState == "complete" to determine whether the loading is complete
The code is as follows :

Copy code The code is as follows:

document.onreadystatechange = subSomething; //Execute this method when the page loading status changes.
function subSomething()
{
if(document.readyState == “complete”) //When the page is loaded
myform.submit(); //Form submission
}

Five states of page loading readyState
The original text is as follows:
0: (Uninitialized) the send( ) method has not yet been invoked.
1: (Loading) the send( ) method has been invoked, request in progress.
2: (Loaded) the send( ) method has completed, entire response received.
3: (Interactive) the response is being parsed.
4: (Completed) the response has been parsed, is ready for harvesting.

is translated into Chinese as :
0 - (not initialized) the send() method has not been called yet
1 - (Loading) The send() method has been called and the request is being sent
2 - (Loading completed) The send() method has been executed and all response content has been received
3 - (Interaction) is being Parse the response content
4 - (Complete) The response content is parsed and can be called on the client