The Blob interface's slice() method creates and returns a new Blob object which contains data from a subset of the blob on which it's called.
The Blob interface's slice() method creates and returns a new Blob object which contains data from a subset of the blob on which it's called.
js
slice() slice(start) slice(start, end) slice(start, end, contentType)
start Optional
An index into the Blob indicating the first byte to include in the new Blob. If you specify a negative value, it's treated as an offset from the end of the Blob toward the beginning. For example, -10 would be the 10th from last byte in the Blob. The default value is 0. If you specify a value for start that is larger than the size of the source Blob, the returned Blob has size 0 and contains no data.
end Optional
An index into the Blob indicating the first byte that will *not* be included in the new Blob (i.e. the byte exactly at this index is not included). If you specify a negative value, it's treated as an offset from the end of the Blob toward the beginning. For example, -10 would be the 10th from last byte in the Blob. The default value is size.
contentType Optional
The content type to assign to the new Blob; this will be the value of its type property. The default value is an empty string.
A new Blob object containing the specified subset of the data contained within the blob on which this method was called. The original blob is not altered.
| Specification |
|---|
| File API # dfn-slice |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
slice |
215–25 | 12 |
13Before Firefox 12, there was a bug that affected the behavior ofBlob.slice(); it did not work for start and end positions outside the range of signed 64-bit values; it has now been fixed to support unsigned 64-bit values. |
10 | 12 | 76–7 | 4.4 | 2518–25 |
14Before Firefox 12, there was a bug that affected the behavior ofBlob.slice(); it did not work for start and end positions outside the range of signed 64-bit values; it has now been fixed to support unsigned 64-bit values. |
12 | 76–7 | 1.51.0–1.5 |
© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Blob/slice