Develop a versatile function for initiating and transmitting Ajax requests

One issue I've encountered in my program is the repetition of code every time I declare an object like a list, save, add, or remove. Each function requires the same lines of code to open a connection to a servlet and then send the request.

//this.ajax.get('./route/action').update('ajax-content');
./route/action // this is path to my Action class-using servlet

I find myself constantly opening connections, specifying the path to the action class (which is a servlet), and then sending the request whenever I need to load a list, delete, or update something.

Is there a way to simplify this process with a function that looks something like this:

this.ajax.get('./route/action');
// 'ajax.content' is the id of the div where I 
// want to show the list,where after updating AJAX show the update list to the user.
update('ajax-content'); 

For example, after adding a user, I'd like to see the changes reflected without reloading the entire page. My project involves Maven, Java EE, Servlet, and JavaScript.

Answer №1

Give this a try:

function makeAjaxRequest(url, elementID){
   var xhr = new XMLHttpRequest(); 
   xhr.open("get", url, true);
   xhr.onreadystatechange = function() {
    if (xhr.readyState == 4 && xhr.status == 200) {
     document.getElementById(elementID).innerHTML = xhr.responseText; //Sends the received data to the specified element
    }
  };
  xhr.send();
}

How to use it:

makeAjaxRequest("/somefile.php", "elementID"); //This will send data to the element with ID of "elementID"

Note: This code is specifically for GET requests. Modify as needed for POST requests.

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