The readyState property indicates the status of the XMLHttpRequest.
The onreadystatechange property sets a callback function to be executed when the readyState changes.
The status and statusText properties hold the current status of the XMLHttpRequest object.
|
Property |
Description |
|
onreadystatechange |
Specifies a function to be executed whenever the |
|
readyState |
Stores the status of the XMLHttpRequest:
|
|
status |
For a full list, refer to the HTTP Status Messages Reference. |
|
statusText |
Returns the status text (e.g., “OK” or “Not Found”). |
The onreadystatechange function is triggered whenever the readyState changes.
When the readyState is 4 and the status is 200, the response is ready.
| function loadDoc() { const xhttp = new XMLHttpRequest(); xhttp.onreadystatechange = function() { if (this.readyState == 4 && this.status == 200) { document.getElementById(“demo”).innerHTML = this.responseText; } }; xhttp.open(“GET”, “ajax_info.txt”); xhttp.send(); } |
The onreadystatechange event is triggered four times (1 through 4), once for each change in the readyState. |