my HTML
This example displays a webpage with a single large heading. The HTML body contains a heading element with the ID `ts`, and the JavaScript uses `d3.select` to set the text of that heading to the string "fhdjkfj" and the body text to "апапвdsdas". The page applies a centered layout with a font size of 13em through its CSS. The code relies on the D3 v6 library, specifically the `select` method, to manipulate the DOM elements.