How ajax can be implemented when it doesn t depend on Juery5

It is more complicated and has poor compatibility, so it is not recommended.

If there are three tabs, their IDs are tab1, tab2, tab3The class is tab

Now import jquery

jQuery is a class library for JS, and JS itself cannot manipulate headers, because JS is only executed during the browser loading the page.

The header needs to be executed on the server side.

In the case of AJAX, it is possible to set the header

ajax(,type: "get",beforesend: function(xhr), which sets the header

success: function() is the setrequestheader function.

success : function(msg) is something that is executed after the submission is successful and the information is returned, and the condition is written to $ajax to go up. If it's validated in the background, then it's okay to set up no action in the background.

General AJAX commits prevent the browser cache from appending a timestamp to the URL of the request, for example: $.ajax(,async:false,cache :false,datatype : "json",success : function(json), hotelid are the submitted parameters.

type : "post", can get can postdemo();

function demo()

async:false,cache :false,datatype : "json",success : function(json)})

You can loop the ajax request through the timer, or directly for the endless loop, by getting the second of the current time, and request ajax when the second is a multiple of 10

It is recommended to use method 2, which is to put a delay function settimeout every time it completes and continue to execute. Because of method 1, if the response takes more than 10 seconds, it will be requested again, which is equivalent to 2 requests.

Use the second option, but you need to set the timeout event to avoid a request that doesn't succeed once and then never requests again.