Document：defaultView 屬性
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.
在瀏覽器中，document.defaultView 回傳與文件相關聯的 window 物件，若無則為 null。
此屬性為唯讀。
值
window 物件。
規範
| Specification |
|---|
| HTML # dom-document-defaultview-dev |
瀏覽器相容性
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