Node.nodeType

Node.nodeType 唯讀屬性表示了節點物件的類型。

描述

The nodeType property can be used to distinguish different kind of nodes, such that elements, text and comments, from each other.

語法

var type = node.nodeType;

Returns an integer value which specifies the type of the node; possible values are listed in Node type constants.

常數

節點類型常數

已過時的節點類型常數 

The following constants have been deprecated and should not be used anymore.

範例

Different types of nodes

document.nodeType === Node.DOCUMENT_NODE; // true
document.doctype.nodeType === Node.DOCUMENT_TYPE_NODE; // true

var fragment = document.createDocumentFragment();
fragment.nodeType === Node.DOCUMENT_FRAGMENT_NODE; // true

var p = document.createElement("p");
p.textContent = "Once upon a time...";

p.nodeType === Node.ELEMENT_NODE; // true
p.firstChild.nodeType === Node.TEXT_NODE; // true

Comments

This example checks if the first node inside the document element is a comment node, and if it is not, displays a message.

var node = document.documentElement.firstChild;
if (node.nodeType != Node.COMMENT_NODE)
  console.log("You should comment your code well!");

規範