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Document:doctype 属性

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨2015年7月⁩.

Document 接口的 doctype 只读属性表示与当前文档关联的文档类型声明(DTD)DocumentType 对象。

DocumentType 对象。

示例

js
const doctypeObj = document.doctype;

console.log(`doctypeObj.name: ${doctypeObj.name}`);
console.log(`doctypeObj.internalSubset: ${doctypeObj.internalSubset}`);
console.log(`doctypeObj.publicId: ${doctypeObj.publicId}`);
console.log(`doctypeObj.systemId: ${doctypeObj.systemId}`);

备注

如果当前文档没有关联 DTD,该属性将返回 null

DOM 第 2 级规范不支持编辑文档类型声明。

规范

Specification
DOM
# ref-for-dom-document-doctype①

浏览器兼容性