Question

(I am Javascript Beginner)

While I am learning Javascript global variable’s life time, it say:

The lifetime of Global variables starts when they are declared, and
ends when the page is closed.

I read that Javascript will store the global variable into window object? And when will it be destroyed? After I close the tab in web browser?

For example:
If abc.com/page1.html create a global variable, after that in the same tab, I navigate to abc.com/page2.html will the global variable still there? How about if I navigate to another domain in the same tab, for example, another.com/page1.html?

Answer 1

Once window is unloaded all your JavaScript variables are lost, let’s say you move from page 1 to page 2, on window leaving your variables are lost, same applies if it’s on same domain or cross domain