Find nodes with fills

code.js

function findFills(nodes) {
  const nodesWithFills = nodes.filter(
    node =>
      node.fills && node.fills.length > 0 && node.fills[0].type === 'SOLID'
  )
  if (nodesWithFills.length <= 0) {
    return figma.notify('Please select a layer that has a solid fill', {
      timeout: 1000,
    })
  }
  const fills = nodesWithFills.map(node => node.fills[0])
  return fills
}