Modifying your prac$6.$html$,$ prac$6.$css$,$ and prac$6.$js files:

Create a Vue.js data property called show$\_$ad whose initial value is set to true.

Set up your page so that:

if show$\_$ad is true

the div with id ad is present and visible on the page

main element is not present on the page

if show$\_$ad is false

main element is present and visible on the page

the div with id ad is not present on the page

If you've done this correctly, clicking the close button should hide the ad div and display the main div.

Do not change onclick attribute of the close button.