FileReader.readyState
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.
提供目前讀取狀態
語法
var state = instanceOfFileReader.readyState
數值
數字代表 FileReader API 三個可能的狀態：
| Value | State | Description |
|---|---|---|
0 |
EMPTY |
Reader has been created. None of the read methods called yet. |
1 |
LOADING |
A read method has been called. |
2 |
DONE |
The operation is complete. |
規格
| Specification |
|---|
| File API # dom-filereader-readystate |
瀏覽器相容性
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