onstorage HTML Attribute

The "onstorage" attribute in HTML is an event attribute that can be added to an element, that when triggered, runs a script when the value of a storage area has changed. The attribute value is a string containing the JavaScript code that should be executed when the event is fired.

For example, in the following code snippet, the onstorage attribute is used to update the page content when the value of a storage area changes:


<body onstorage="updatePageContent()">

The onstorage attribute is typically used to listen for changes in the value of a storage area, such as sessionStorage or localStorage. It can be used to update the page content, change the URL displayed in the address bar, or to perform other actions based on the change in the storage area. It's useful for creating dynamic web pages that update based on user interactions and data stored in the storage areas.

It's worth noting that the onstorage attribute is supported by most modern browsers, but not all, so it's important to check the browser compatibility before using it in your website.

In summary, the "onstorage" attribute in HTML is an event attribute that can be added to an element, that when triggered, runs a script when the value of a storage area has changed. It's typically used to listen for changes in the value of a storage area, such as sessionStorage or localStorage. It can be used to update the page content, change the URL displayed in the address bar, or to perform other actions based on the change in the storage area. It's useful for creating dynamic web pages that update based on user interactions and data stored in the storage areas. It is supported by most modern browsers, but not all, so it's important to check the browser compatibility before using it in your website.