Search and Filter DOM nodes using createTreeWalker

findNodes.js

function findNodes(options = {}) {
  let node
  const arr = []
  const el = options.el || document.body
  const filter = options.filter ? { acceptNode: options.filter } : null
  
  const walk = document.createTreeWalker(el, NodeFilter.SHOW_ELEMENT, filter, false)
  
  while(node = walk.nextNode()) {
    arr.push(node)
  }
  return arr
}

// Example: find all nodes that have a width greater than 375px
findNodes({ filter: node => node.scrollWidth > 375 })