Function removeNonInteractive

lib/html.js:132–178

(node)

  // Function to remove non-interactive elements recursively
  function removeNonInteractive(node) {
    if (node.nodeName !== '#document') {
      const parent = node.parentNode
      const index = parent.childNodes.indexOf(node)

      if (isFilteredOut(node)) {
        parent.childNodes.splice(index, 1)
        return true
      }

      // keep texts for interactive elements
      if ((isInteractive(parent) || hasMeaningfulText(parent)) && node.nodeName === '#text') {
        node.value = node.value.trim().slice(0, 200)
        if (!node.value) return false
        return true
      }

      if (
        // if parent is interactive, we may need child element to match
        !isInteractive(parent) &&
        !isInteractive(node) &&
        !hasInteractiveDescendant(node) &&
        !hasMeaningfulText(node)
      ) {
        parent.childNodes.splice(index, 1)
        return true
      }
    }

    if (node.attrs) {
      // Filter and keep allowed attributes, accessibility attributes
      node.attrs = node.attrs.filter(attr => {
        if (attr.name === 'class') {
          attr.value = filterClassValue(attr.value)
        }
        return allowedAttrs.includes(attr.name)
      })
    }

    if (node.childNodes) {
      for (let i = node.childNodes.length - 1; i >= 0; i--) {
        const childNode = node.childNodes[i]
        removeNonInteractive(childNode)
      }
    }
    return false
  }

  // Remove non-interactive elements starting from the root element
  removeNonInteractive(document)