Show price changes in amazon basket or after adding item

basket.js

// Paste into dev console

[...document.querySelectorAll(".a-list-item, .huc-v2-item-msg")].map(x => {
  const lims = x.innerText.match(/from £([0-9.]+) to £([0-9.]+)/)?.slice(1,3);
  if (!!lims) {
    const p = lims[1] - lims[0];
    const y = 100*p/lims[0];
    return [p, `£${p.toFixed(2)} (${y.toFixed(1)} %): ${x.innerText}`];
  }
}).filter(x => !!x).sort((a,b) => b[0] - a[0]).forEach(([_,v]) => console.log(v));