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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：
規格
| 規格 | 狀態 | 說明 |
|---|---|---|
| File API The definition of 'FileReader' in that specification. |
Working Draft | 初始化定義 |
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. Find out how you can help!
| 功能 | Firefox (Gecko) | Chrome | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| 基本支援 | 3.6 (1.9.2)[1] | 7 | 10[2] | 12.02[3] | 6.0.2 |
| 功能 | Firefox 手機版 (Gecko) | Android | IE 手機版 | Opera 手機版 | Safari 手機版 |
|---|---|---|---|---|---|
| 基本支援 | 32 | 3 | 10 | 11.5 | 6.1 |
[1] Prior to Gecko 2.0 beta 7 (Firefox 4.0 beta 7), all Blob parameters below were File parameters; this has since been updated to match the specification correctly. Prior to Gecko 13.0 (Firefox 13.0 / Thunderbird 13.0 / SeaMonkey 2.10) the FileReader.error property returned a FileError object. This interface has been removed and FileReader.error is now returning the DOMError object as defined in the latest FileAPI draft.
[2] IE9 has a File API Lab.
[3] Opera has partial support in 11.1.