What is the difference between Onreadystatechange and onload?

What is the difference between Onreadystatechange and onload?

1 Answer. A readystatechange event fires every time the readyState changes (which is several times). A load event fires only when the request has completed successfully.

What is the meaning of Onreadystatechange?

onreadystatechange. An event handler that is called whenever the readyState attribute changes. The XMLHttpRequest. onreadystatechange property contains the event handler to be called when the readystatechange event is fired, that is every time the readyState property of the XMLHttpRequest changes.

What is the meaning of readyState 2 in XMLHttpRequest?

readyState = 2 After you have called send(). readyState = 3 After the browser has established a communication with the server, but before the server has completed the response. readyState = 4 After the request has been completed, and the response data has been completely received from the server.

Which one is load first window or document ready?

The ready event occurs after the HTML document has been loaded, while the onload event occurs later, when all content (e.g. images) also has been loaded.

What is readyState in AJAX?

AJAX – Server Response The readyState property holds the status of the XMLHttpRequest. The onreadystatechange property defines a function to be executed when the readyState changes. The status property and the statusText property holds the status of the XMLHttpRequest object.

What is this responseText in AJAX?

The responseText method is used for all formats that are not based on XML. It returns an exact representation of the response as a string. Plain text, (X)HTML, and JSON are all formats that use responseText.

What does readyState 3 mean?

What is XHR readyState=3? Having the readyState with a value of 3 it means that the current state is LOADING . So when is a readyStateChange event for that state fired? Whenever an asynchrounous request does switch to the LOADING state.

When XMLHttpRequest object readyState is 4 What does it represent?

xhr. readstate===4 means request finished and response is ready.

What is window onload?

The onload property processes load events after the element has finished loading. This is used with the window element to execute a script after the webpage has completely loaded. It will run the function as soon as the webpage has been loaded.

What is difference between onload and ready?

onload() fires when all the content (everything) on the targeted eleement is fully loaded like CSS, images etc. $. ready indicates that code in it need to be executed once the targeted elements content loaded and ready to be manipulated by script. It won’t wait for the images to load for executing the jQuery script.