Extracting content from a Wikipedia table

extract-from-a-wikipedia-table.js

// Run this in the console when you have a Wikipedia page open.
// First, get the wikitable element you want and add an id of `main-table` to it.
// Then:
var rows = document.querySelectorAll('#main-table tr');
var extracted = [];

function extractFromRow(row) {
  if (row.children.length > 2) {
    let event = {
        yearsFromNow: row.children[1].textContent.replace(/\n/g, '').replace(/\[note \d+\]/g, ''),
        contentHTML: row.children[2].innerHTML.replace(/\n/g, '')
    };
    event.yearsNumber = +(event.yearsFromNow.replace(/[A-Za-z,]/g, ''))
    extracted.push(event);
  }
}

for (var i = 1; i < rows.length; ++i) {
  extractFromRow(rows[i]);
}

extracted.unshift({ yearsFromNow: 0, yearsNumber: 0, contentHTML: 'Now.' });

copy(extracted);
// Then, paste what's on the clipboard into a file or wherever you need it.