在瀏覽器中，document.defaultView 屬性會指向一個目前 document 所屬的 window 物件，若無則為 null。
語法
var win = document.defaultView;
此為唯讀屬性。
規範
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'Document.defaultView' in that specification. |
Living Standard | No change |
| HTML5 The definition of 'Document.defaultView' in that specification. |
Recommendation | Initial definition |
瀏覽器相容性
We're converting our compatibility data into a machine-readable JSON format.
This compatibility table still uses the old format,
because we haven't yet converted the data it contains.
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| Feature | Firefox (Gecko) | Chrome | Edge | Internet Explorer | Edge | Opera | Safari |
|---|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | (Yes) | 9.0 | 0.10 | (Yes) | (Yes) |
| Feature | Firefox Mobile (Gecko) | Android | Edge | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | ? | ? | ? | ? | ? | ? |