NodeFilter

NodeFilter 인터페이스는 NodeIterator (en-US)TreeWalker에서 노드를 거를 때 사용하는 객체를 나타냅니다. NodeFilter는 DOM이나 노드 순회 방법은 알지 못하며, 주어진 필터에 대해 단일 노드를 평가하는 방법만 알 수 있습니다.

참고: The browser doesn't provide any object implementing this interface. It is the user who is expected to write one, tailoring the acceptNode() method to its needs, and using it with some TreeWalker or NodeIterator (en-US) objects.

Properties

This interface neither implements, nor inherits, any properties.

Methods

This interface doesn't inherit any methods.

Example

var nodeIterator = document.createNodeIterator(
  // Node to use as root
  document.getElementById('someId'),

  // Only consider nodes that are text nodes (nodeType 3)
  NodeFilter.SHOW_TEXT,

  // Object containing the function to use for the acceptNode method
  // of the NodeFilter
    { acceptNode: function(node) {
      // Logic to determine whether to accept, reject or skip node
      // In this case, only accept nodes that have content
      // other than whitespace
      if ( ! /^\s*$/.test(node.data) ) {
        return NodeFilter.FILTER_ACCEPT;
      }
    }
  },
  false
);

// Show the content of every non-empty text node that is a child of root
var node;

while ((node = nodeIterator.nextNode())) {
  alert(node.data);
}

Specifications

Specification
DOM Standard
# dom-document-createnodeiterator

Browser compatibility

BCD tables only load in the browser

See also