Redirect to a page or URL after share

Hi team, after a user share, i would like to redirect them to a page or URL. This is for multiple tracking purpose other than using GA. i added below code in “Additional JavaScript” box, using the Thank You and Ad Unit modal based on your documentation and redirect instruction here and it worked.

a2a_config.thanks = {
    postShare: true,
    ad: '    <\script>\
              let url = \"https://www.w3docs.com\";\
              window.location.href = url;\
            <\/script>'
};

So my questions:

1- If there’s any “official” method or better way to do this

2- From your documentation, there’s statement below. With the code implementation above, is that mean, 50% of the user will got redirected and 50% will not?

Like a coin toss, rotation uses Math.random() to give both ad units about a 50% chance of display.

Thanks in advance.