返回当前文档关联的文档类型定义(DTD). 返回的对象实现了 DocumentType 接口。使用
DOMImplementation.createDocumentType() 方法可以创建一个DocumentType类型的对象。语法
doctype = document.doctype;
doctype是一个只读属性.
示例
var doctypeObj = document.doctype; console.log( "doctypeObj.name: " + doctypeObj.name + "\n" + "doctypeObj.internalSubset: " + doctypeObj.internalSubset + "\n" + "doctypeObj.publicId: " + doctypeObj.publicId + "\n" + "doctypeObj.systemId: " + doctypeObj.systemId );
附注
如果当前文档没有DTD，则该属性返回null。
DOM level 2 不支持编辑文档类型定义。
规范
| 规范 | 状态 | 备注 |
|---|---|---|
| DOM Document: doctype |
Living Standard |
浏览器兼容性
这个页面的兼容性表格是由结构数据生成。如果你想对数据作出贡献，详情请前往 https://github.com/mdn/browser-compat-data 并给我们一个PR。
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
doctype | Chrome Full support 1 | Edge Full support 12 | Firefox Full support Yes | IE ? | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android ? |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown