在此页

• 句法
• 范例
• 注意事项
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

Node.childNodes read-only property returns a live NodeList of child nodes of the given element where the first child node is assigned index 0.

句法

let nodeList = elementNodeReference.childNodes;
					

范例

简单用法

// parg is an object reference to a <p> element
// First check that the element has child nodes
if (parg.hasChildNodes()) {
  let children = parg.childNodes;
  for (let i = 0; i < children.length; i++) {
    // do something with each child as children[i]
    // NOTE: List is live! Adding or removing children will change the list's `length`
  }
}
					

Remove all children from a node

// This is one way to remove all children from a node
// box is an object reference to an element
while (box.firstChild) {
    //The list is LIVE so it will re-index each call
    box.removeChild(box.firstChild);
}
					

注意事项

The items in the collection of nodes are objects, not strings. To get data from node objects, use their properties. (For example, to get the name of the first childNode: elementNodeReference .childNodes[1].nodeName )。

document object itself has 2 children: the Doctype declaration and the root element, typically referred to as documentElement . (In (X)HTML documents this is the HTML element.)

childNodes 包括 all child nodes—including non-element nodes like text and comment nodes. To get a collection of only elements, use ParentNode.children 代替。

规范

规范	状态	注释
DOM The definition of 'Node.childNodes' in that specification.	实时标准	无变化
DOM (文档对象模型) 3 级核心规范 The definition of 'Node.childNodes' in that specification.	过时	无变化
DOM (文档对象模型) 级别 2 核心规范 The definition of 'Node.childNodes' in that specification.	过时	无变化
DOM (文档对象模型) 1 级规范 The definition of 'Node.childNodes' in that specification.	过时	初始定义

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
childNodes	Chrome 1	Edge 12	Firefox 1	IE 5	Opera 7	Safari 1.2	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0

图例

完整支持

完整支持

另请参阅

• Node.firstChild
• Node.lastChild
• Node.nextSibling
• Node.previousSibling
• ParentNode.children

元数据

• 最后修改： Jan 26, 2020

相关话题

1. DOM (文档对象模型)
2. 节点
3. 特性

   1. baseURI
   2. baseURIObject
   3. childNodes
   4. firstChild
   5. isConnected
   6. lastChild
   7. localName
   8. namespaceURI
   9. nextSibling
   10. nodeName
   11. nodePrincipal
   12. nodeType
   13. nodeValue
   14. outerText
   15. ownerDocument
   16. parentElement
   17. parentNode
   18. prefix
   19. previousSibling
   20. rootNode
   21. textContent
4. 方法

   1. appendChild()
   2. cloneNode()
   3. compareDocumentPosition()
   4. contains()
   5. getRootNode()
   6. getUserData()
   7. hasChildNodes()
   8. insertBefore()
   9. isDefaultNamespace()
   10. isEqualNode()
   11. isSameNode()
   12. isSupported()
   13. lookupNamespaceURI()
   14. lookupPrefix()
   15. normalize()
   16. removeChild()
   17. replaceChild()
   18. setUserData()
5. 继承：

   1. EventTarget
6. DOM 相关页面

   1. AbortController
   2. AbortSignal
   3. AbstractRange
   4. Attr
   5. ByteString
   6. CDATASection
   7. CSSPrimitiveValue
   8. CSSValue
   9. CSSValueList
   10. CharacterData
   11. ChildNode
   12. 注释
   13. CustomEvent
   14. DOMConfiguration
   15. DOMError
   16. DOMErrorHandler
   17. DOMException
   18. DOMImplementation
   19. DOMImplementationList
   20. DOMImplementationRegistry
   21. DOMImplementationSource
   22. DOMLocator
   23. DOMObject
   24. DOMParser
   25. DOMPoint
   26. DOMPointInit
   27. DOMPointReadOnly
   28. DOMRect
   29. DOMString
   30. DOMTimeStamp
   31. DOMTokenList
   32. DOMUserData
   33. Document
   34. DocumentFragment
   35. DocumentType
   36. 元素
   37. ElementTraversal
   38. Entity
   39. EntityReference
   40. 事件
   41. EventTarget
   42. HTMLCollection
   43. MutationObserver
   44. NodeFilter
   45. NodeIterator
   46. NodeList
   47. NonDocumentTypeChildNode
   48. ProcessingInstruction
   49. PromiseResolver
   50. 范围
   51. StaticRange
   52. 文本
   53. TextDecoder
   54. TextEncoder
   55. TimeRanges
   56. TreeWalker
   57. TypeInfo
   58. USVString
   59. UserDataHandler
   60. XMLDocument