From 43a5cac2eff22c21071800e13bef12af9d3a37d0 Mon Sep 17 00:00:00 2001 From: Florian Merz Date: Thu, 11 Feb 2021 13:12:08 +0100 Subject: unslug zh-tw: move --- .../web/api/document/createtreewalker/index.html | 224 +++++++++++++++++++++ 1 file changed, 224 insertions(+) create mode 100644 files/zh-tw/web/api/document/createtreewalker/index.html (limited to 'files/zh-tw/web/api/document/createtreewalker/index.html') diff --git a/files/zh-tw/web/api/document/createtreewalker/index.html b/files/zh-tw/web/api/document/createtreewalker/index.html new file mode 100644 index 0000000000..9e74411a14 --- /dev/null +++ b/files/zh-tw/web/api/document/createtreewalker/index.html @@ -0,0 +1,224 @@ +--- +title: Document.createTreeWalker() +slug: Web/API/document.createTreeWalker +translation_of: Web/API/Document/createTreeWalker +--- +
+ {{ApiRef("Document")}}
+

Document.createTreeWalker() 方法，能建立一個 {{domxref("TreeWalker")}} 物件並傳回.

+

語法

+
treeWalker = document.createTreeWalker(root, whatToShow, filter, entityReferenceExpansion);
+
+

參數

+
+
+ root
+
+ 是這個 {{domxref("TreeWalker")}} 遍歷的根節點(root {{domxref("Node")}}). Typically this will be an element owned by the document.
+
+ whatToShow {{optional_inline}}
+
+ Is an optional unsigned long representing a bitmask created by combining the constant properties of NodeFilter. 它是一種方便的方法，用來過濾某些類型的節點。 It defaults to 0xFFFFFFFF representing the SHOW_ALL constant.
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Constant數值說明
NodeFilter.SHOW_ALL-1 (that is the max value of unsigned long)顯示所有節點.
NodeFilter.SHOW_ATTRIBUTE {{deprecated_inline}}2Shows attribute {{ domxref("Attr") }} nodes. This is meaningful only when creating a {{ domxref("TreeWalker") }} with an {{ domxref("Attr") }} node as its root; in this case, it means that the attribute node will appear in the first position of the iteration or traversal. Since attributes are never children of other nodes, they do not appear when traversing over the document tree.
NodeFilter.SHOW_CDATA_SECTION {{deprecated_inline}}8Shows {{ domxref("CDATASection") }} nodes.
NodeFilter.SHOW_COMMENT128Shows {{ domxref("Comment") }} nodes.
NodeFilter.SHOW_DOCUMENT256Shows {{ domxref("Document") }} nodes.
NodeFilter.SHOW_DOCUMENT_FRAGMENT1024Shows {{ domxref("DocumentFragment") }} nodes.
NodeFilter.SHOW_DOCUMENT_TYPE512Shows {{ domxref("DocumentType") }} nodes.
NodeFilter.SHOW_ELEMENT1Shows {{ domxref("Element") }} nodes.
NodeFilter.SHOW_ENTITY {{deprecated_inline}}32Shows {{ domxref("Entity") }} nodes. This is meaningful only when creating a {{ domxref("TreeWalker") }} with an {{ domxref("Entity") }} node as its root; in this case, it means that the {{ domxref("Entity") }} node will appear in the first position of the traversal. Since entities are not part of the document tree, they do not appear when traversing over the document tree.
NodeFilter.SHOW_ENTITY_REFERENCE {{deprecated_inline}}16Shows {{ domxref("EntityReference") }} nodes.
NodeFilter.SHOW_NOTATION {{deprecated_inline}}2048Shows {{ domxref("Notation") }} nodes. This is meaningful only when creating a {{ domxref("TreeWalker") }} with a {{ domxref("Notation") }} node as its root; in this case, it means that the {{ domxref("Notation") }} node will appear in the first position of the traversal. Since entities are not part of the document tree, they do not appear when traversing over the document tree.
NodeFilter.SHOW_PROCESSING_INSTRUCTION64Shows {{ domxref("ProcessingInstruction") }} nodes.
NodeFilter.SHOW_TEXT4顯示文字節點({{ domxref("Text") }} nodes).
+
+
+ filter {{optional_inline}}
+
+ 是一個可選的 {{domxref("NodeFilter")}}, 這是一個物件有著 acceptNode 方法, 這方法被 {{domxref("TreeWalker")}} 呼叫來決定是否接受通過 whatToShow 檢查的節點.
+
+ entityReferenceExpansion {{optional_inline}} {{obsolete_inline}}
+
+ Is a {{domxref("Boolean")}} flag indicating if when discarding an {{domxref("EntityReference")}} its whole sub-tree must be discarded at the same time.
+
+

Example

+

The following example goes through all nodes in the body, reduces the set of nodes to elements, simply passes through as acceptable each node (it could reduce the set in the acceptNode() method instead), and then makes use of tree walker iterator that is created to advance through the nodes (now all elements) and push them into an array.

+
var treeWalker = document.createTreeWalker(
+  document.body,
+  NodeFilter.SHOW_ELEMENT,
+  { acceptNode: function(node) { return NodeFilter.FILTER_ACCEPT; } },
+  false
+);
+
+var nodeList = [];
+
+while(treeWalker.nextNode()) nodeList.push(treeWalker.currentNode);
+
+

Specifications

+ + + + + + + + + + + + + + + + + + +
SpecificationStatusComment
{{SpecName('DOM WHATWG', '#dom-document-createtreewalker', 'Document.createTreeWalker')}}{{Spec2('DOM WHATWG')}}Removed the expandEntityReferences parameter.
+ Made the whatToShow and filter parameters optionals.
{{SpecName('DOM2 Traversal_Range', 'traversal.html#NodeIteratorFactory-createTreeWalker', 'Document.createTreeWalker')}}{{Spec2('DOM2 Traversal_Range')}}Initial definition.
+

Browser compatibility

+

{{CompatibilityTable}}

+
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
FeatureChromeFirefox (Gecko)Internet ExplorerOperaSafari
Basic support1.0{{CompatGeckoDesktop("1.8.1")}}9.09.03.0
whatToShow and filter optional1.0{{CompatGeckoDesktop("12")}}{{CompatNo}}{{CompatVersionUnknown}}3.0
expandEntityReferences {{obsolete_inline}}1.0{{CompatGeckoDesktop("1.8.1")}}
+ Removed in {{CompatGeckoDesktop("12")}}		9.09.03.0
+
+
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
FeatureAndroidFirefox Mobile (Gecko)IE MobileOpera MobileSafari Mobile
Basic support{{CompatVersionUnknown}}{{CompatGeckoMobile("1.8.1")}}{{CompatVersionUnknown}}9.03.0
whatToShow and filter optional{{CompatVersionUnknown}}{{CompatGeckoDesktop("12")}}{{CompatNo}}{{CompatVersionUnknown}}3.0
expandEntityReferences {{obsolete_inline}}{{CompatVersionUnknown}}{{CompatGeckoDesktop("1.8.1")}}
+ Removed in {{CompatGeckoDesktop("12")}}		{{CompatVersionUnknown}}9.03.0
+
+

See also

+ -- cgit v1.2.3-54-g00ecf