Passing values from one page to another in JavaScript [closed]

Answer 1

Global variables in one page are not kept by the next.

If you want this client-side, you have three options (at least):

1. Pass the variable to the next page on the query string, e.g.:

   window.location = "WebForm2.aspx?myvar=" + encodeURIComponent(myvar);
   

2. Use a cookie (millions of examples online, I won't repeat them, bit of a pain to read the cookie).

3. Use client-side session storage or local storage, both of which are covered here. Here's the client-side session storage example:

   // Setting
   sessionStorage.myvar = myvar;
   
   // Getting (on the next page)
   var myvar = sessionStorage.myvar;
   

   (sessionStorage is a global variable provided by the browser.)

   This works on just about any browser you need to care about (IE8+, and modern versions of basically everything else).

Server-side, both option 1 and 2 would work, but 1 would make the most sense.

Answer 2

You cannot set a session with Javascript. Your output JS file will be exactly what you wrote down.

You can do it like this:

window.location = "WebForm2.aspx?temp=" + myvar;

And in Webform2 you can do:

Request.querystring["temp"];