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This article mainly introduces the relevant knowledge of how to create XMLHttpRequest objects, the content is detailed and easy to understand, the operation is simple and fast, and has a certain reference value. I believe you will gain something after reading this article on how to create XMLHttpRequest objects. Let's take a look at it.

The core of Ajax is the XMLHttpRequest object.

XMLHttpRequest object

All modern browsers support XMLHttpRequest objects.

The XMLHttpRequest object is used to exchange data with the behind-the-scenes server. This means that parts of the page can be updated without having to reload the entire page.

Create a XMLHttpRequest object

All modern browsers (Chrom, IE7+, Firefox, Safari, and Opera) have built-in XMLHttpRequest objects.

The syntax for creating a XMLHttpRequest is:

Variable = new XMLHttpRequest ()

Older versions of Internet Explorer (IE5 and IE6) use ActiveX objects:

Variable = new ActiveXObject ("Microsoft.XMLHTTP")

To handle all browsers, including IE5 and IE6, check that the browser supports XMLHttpRequest objects. If it is supported, create a XMLHttpRequest object, if not, create an ActiveX object:

Example

Var xhttp

If (window.XMLHttpRequest) {

Xhttp = new XMLHttpRequest ()

} else {

/ / code for IE6, IE5

Xhttp = new ActiveXObject ("Microsoft.XMLHTTP")

}

This is the end of the article on "how to create XMLHttpRequest objects". Thank you for reading! I believe you all have a certain understanding of the knowledge of "how to create XMLHttpRequest objects". If you want to learn more, you are welcome to follow the industry information channel.

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