Using Ajax to populate two dropdown menus by utilizing the selected value from a third dropdown menu

I have an HTML page that includes 3 drop-down boxes. Whenever I make a selection in one of the boxes, the chosen value is sent to the server, and the server should return the values for the other 2 drop-down boxes. How can I dynamically populate the other 2 drop-down boxes based on the selected value of the first one? All values are retrieved from the server side.

For example: dd1, dd2, dd3 where dd = drop down box

If I change the value in dd1, it is sent to the server, which then returns the values for dd2 and dd3. How do I populate dd2 and dd3 accordingly? In what format should the server reply?

Please note: I am using plain Ajax and do not intend to use jQuery or other frameworks. I am seeking a simple Ajax solution.

Answer №1

Send an AJAX request and once the response is received successfully, place the data in its appropriate spot within the DOM. The ease of inserting the response will vary based on its type and format.

This is the typical procedure for utilizing AJAX

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