Incorrect anchor link behaviour when multiple small blocks appear at the bottom of the page

[dariasavinova]

Related issue from vuejs/docs - 3140

The problem with anchor links and clicks is related to the current check for whether the user is at the bottom of the page.
This check breaks the behaviour of anchor links when there are small blocks with anchor links at the end of the page (multiple blocks can fit on the screen at once).
In this case, the last link is automatically set as active, and this is exactly what needs to be fixed.
This behaviour can currently be observed here