Persisting JavaScript Variables Across Pages

In JavaScript, variables generally have a limited scope to the page where they are defined. However, there might be scenarios where you need to access variables from one page to another. This is where the concept of persisting variables comes into play.

One method for persisting JavaScript variables across pages is to utilize the window.name property. This property allows you to store data as a string within the name attribute of the browser window. To set a variable using this method, assign it to the window.name object. For example, on Page A:

window.name = "someVar=5";

When you navigate to Page B, the value of someVar can be retrieved from window.name:

var someVar = window.name.split("=")[1]; // returns "5"

However, it's important to note that this approach has some limitations:

• It can only store data as strings, which may require additional parsing.
• It only works within the same browsing context (same window/tab).
• Some older browsers may not support using window.name for storing data.