windowonhashchange

The window.onhashchange property is an event handler in JavaScript that allows developers to execute a function when the fragment identifier (the part of the URL that follows the hash symbol #) of the current document changes. This property is particularly useful for creating single-page applications (SPAs) where different views or states are represented by different hash values in the URL.

When the hash value changes, the browser triggers the onhashchange event, and if the window.onhashchange property is set to a function, that function will be called. This function can then update the content of the page dynamically without requiring a full page reload.

The onhashchange event handler can be set using the following syntax:

window.onhashchange = function() {

// Code to execute when the hash changes

};

This approach provides a simple and effective way to manage navigation and state changes in web applications, enhancing user experience by making the application feel more responsive and interactive. However, it is important to note that the onhashchange event is not supported in older versions of Internet Explorer (IE 7 and below). For broader compatibility, developers may need to consider alternative methods or polyfills.