How Can You Preserve JavaScript Variables Across Page Navigation?

Preserving JavaScript Variables Beyond Page Navigation

Imagine you're working on a web application where you need to store data that persists across different pages. In JavaScript, variables are scoped to the current page and are reset upon navigation. This poses a challenge when you want to retain certain values across multiple pages.

One technique to overcome this is by utilizing the window.name property. The window.name property is a global variable that stores the name of the current window or tab. By setting the window.name property to the desired value, you can access it from any page that opens in the same window.

Example:

Consider the scenario described in the original question:

1. On Page A, you set window.someVar = 5.
2. You navigate to Page B via a hyperlink.
3. On Page B, you can access the value of window.someVar by calling window.someVar.

Limitations:

While using window.name to persist JavaScript variables is effective, it is important to note that it only works within the same window or tab. If you open a new window or tab, the window.name property will be reset.

Alternative Approaches:

There are other approaches to persist JavaScript variables beyond page navigation, such as:

• Local Storage: Local storage is a browser-native API that allows you to store data that persists across sessions.
• Cookies: Cookies are small text files that are stored on the user's device and can be used to store browser-specific data.
• IndexedDB: IndexedDB is a web database API that provides a persistent and schema-less database for client-side applications.

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