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When working with multiple AJAX requests at that time its hard to detect when will be all request is being completed.
You can use the setTimout() method which will execute your action after your given time. But it is not a better solution.
jQuery has the inbuilt event handler to detect AJAX completion.
A slider is a good way to avoid bad input from the user if you want them to pick values within the range.
To add slider control I am using jQuery UI slider.
In this tutorial, I show how you can use the jQuery UI slider to filter MySQL database records using jQuery AJAX and PHP.
If the form is already submitted and the user tries to refresh the webpage then the browser will attempt to resubmit the form.
If you are allowing the user to fill and submit the form for insert data. In this case, if the user refreshes the page then the data is reinserted into the MySQL database table if some action does not perform for preventing it.
In this tutorial, I show you some ways by using which you can avoid the page resubmit.
When an AJAX request is sent to fetch records from the server then it may take time depending on the data processing or the number of records.
If the AJAX request takes more time then at the Client-side there is no visible change is been displayed and the user doesn’t know whether its request is in progress or not.
You can display a loading image or text message on the page when the AJAX request is in progress and hide it after getting a response.
In the demonstration, I am displaying a loading image when sending an AJAX request.
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