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• 句法
• 细节
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

baseURI 只读特性返回绝对基 URL 为 节点 .

The base URL is used to resolve relative URLs when the browser needs to obtain an absolute URL, for example when processing the HTML <img> 元素的 src attribute or XML xlink :href 属性。

In most cases the base URL is simply the location of the document, but it can be affected by many factors, including the <base> element in HTML and the xml:base attribute in XML.

句法

var nodeBaseURI = node.baseURI;
					

值

A DOMString representing the base URL of the specified 节点 . It may be null if unable to obtain an absolute URI. Although this property is read-only, its value may change in certain situations (see below).

细节

文档的基 URL

The base URL of a document defaults to the document's address (as displayed by the browser and available in window.location ), but it can be changed:

• When an HTML <base> tag is found in the document
• When the document is new (created dynamically)

见 HTML 实时标准的基 URL 章节 了解细节。

可以使用 document .baseURI to obtain the base URL of a document. Note that obtaining the base URL for a document may return different URLs over time if the <base> tags or the document's location change.

元素的基 URL

The base URL of an element in HTML normally equals the base URL of the document the node is in.

If the document contains xml:base attributes (which you shouldn't do in HTML documents), the element .baseURI takes the xml:base attributes of element's parents into account when computing the base URL. See xml:base 了解细节。

可以使用 element .baseURI 以获得元素的基 URL。

规范

规范	状态	注释
DOM 在该规范中的 Node: baseURI 定义。	实时标准

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
baseURI	Chrome Yes	Edge 12	Firefox 1	IE ?	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 4	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持

完整支持

兼容性未知 ?

兼容性未知

另请参阅

• <base> 元素 (HTML)
• xml:base 属性 (XML 文档)。
• Node.baseURIObject - a variant of this API for Mozilla add-ons and internal code. Returns the base URL as an nsIURI .

元数据

• 最后修改： Jan 8, 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