How to prevent Google Colab from disconnecting?

Edit 2:
As of March 2021, none of these methods will work as google added a captcha button that randomly pops up after some time.

Edit 1:
Apparently the solution is very easy, and doesn’t need any JavaScript.
Just create a new cell at the bottom having the following line:

while True:pass

now keep the cell in the run sequence so that the infinite loop won’t stop and thus keep your session alive.

Old method:
Set a javascript interval to click on the connect button every 60 seconds.
Open developer-settings (in your web-browser) with Ctrl+Shift+I then click on console tab and type this on the console prompt. (for mac press Option+Command+I)

function ConnectButton(){
  console.log("Connect pushed"); 
  document.querySelector("#top-toolbar > colab-connectbutton").shadowRoot.querySelector("#connect").click() 
}
setInterval(ConnectButton,60000);