Script to link footnotes back to text in Paul Graham's essays

linkback.js

// Open the console and paste this code into it.

// Get all the text links to footnotes
const textLinks = document.querySelectorAll('a[href^="#f"]');

// Iterate over each text link
textLinks.forEach((link) => {
  // Get the footnote number from the 'href' attribute of the text link
  // f{num}n
  let href=link.getAttribute('href')
  const footnoteNum = parseInt(href.match(/#f(\d+)n/)?.[1])

  // Add the 'name' attribute to the text link
  link.setAttribute('name', `t${footnoteNum}n`);

  // Get the corresponding footnote using the 'name' attribute
  const footnote = document.querySelector(`a[name="f${footnoteNum}n"]`);

  // Add the 'href' attribute to the footnote using the text link's 'name' attribute
  footnote.setAttribute('href', `#t${footnoteNum}n`);
});