HTMLObjectElement：form 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 July 2015.
HTMLObjectElement 接口的 form 只读属性返回一个表示对象元素的表单所有者的 HTMLFormElement，如果没有则为 null。
值
规范
| Specification |
|---|
| HTML Standard # dom-fae-form-dev |
浏览器兼容性
BCD tables only load in the browser