How can Ajax retrieve data from the backend and display it on the frontend?

2 years ago
Liam
2 minutes

To retrieve backend data using Ajax and display it on the frontend, you can follow these steps:

  1. Create an XMLHttpRequest object.
  2. Create a new instance of an XMLHttpRequest and assign it to the variable xhttp.
  3. Set up a callback function to handle the data returned from the backend.
  4. xhttp.onreadystatechange = function() {
    if (this.readyState === 4 && this.status === 200) {
    // Handle the returned data
    var responseData = JSON.parse(this.responseText);
    // Display the data on the front end
    displayData(responseData);
    }
    };
  5. Send an HTTP request to the backend.
  6. Send a GET request to the backend URL using asynchronous mode.
  7. The “backend-url” here is the URL where your backend provides data, you need to replace it with the actual backend interface address.
  8. Function to display data on the front end.
  9. displayData(data) {
    // Here, you can use DOM manipulation to display the data on the page
    // For example, you can use the innerHTML property to insert the data into a specific element
    document.getElementById(“data-container”).innerHTML = data;
    }
  10. The “data-container” here refers to the ID of the element where you want to display data, which can be replaced as needed.

The above are the basic steps for using Ajax to retrieve backend data and display it on the frontend. Please note that this is just a simple example and may need appropriate modifications and expansions based on specific project requirements.

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