BlobBuilder | Web API

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方法概述
方法
浏览器兼容性
另请参阅
相关话题

过时
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

BlobBuilder interface provides an easy way to construct Blob objects. Just create a BlobBuilder and append chunks of data to it by calling the append() method. When you're done building your blob, call getBlob() to retrieve a Blob containing the data you sent into the blob builder.

注意：


							BlobBuilder

interface has been deprecated in favor of the newly introduced


								Blob

构造函数。

方法概述


										void
										
											append
										
										(in ArrayBuffer data);


										void
										
											append
										
										(in Blob data);


										void
										
											append
										
										(in String data, [optional] in String endings);


										Blob
										
											getBlob
										
										([optional] in DOMString contentType);


										File
										
											getFile
										
										(in DOMString name, [optional] in DOMString contentType);

方法

append()

Appends the contents of the specified JavaScript object to the Blob being built. If the value you specify isn't a Blob , ArrayBuffer ，或 字符串 , the value is coerced to a string before being appended to the blob.

void append(
  in ArrayBuffer data
);
void append(
  in Blob data
);
void append(
  in String data,
  [optional] in String endings
);

参数

data: The data to append to the Blob being constructed.
endings: Specifies how strings containing \n are to be written out. This can be "transparent" (endings unchanged) or "native" (endings changed to match host OS filesystem convention). The default value is "transparent" .

getBlob()

返回 Blob object that has been constructed using the data passed through calls to append() .

Blob getBlob(
  in DOMString contentType Optional
);

参数

contentType 可选: The MIME type of the data to be returned in the Blob . This will be the value of the Blob object's type property.

返回值

A Blob object containing all of the data passed to any calls to append() made since the BlobBuilder was created. This also resets the BlobBuilder so that the next call to append() is starting a new, empty blob.

getFile()

返回 File 对象。

File getFile(
  in DOMString name,
  [optional] in DOMString contentType
);

参数

名称
contentType 可选: The MIME type of the data to be returned in the File . This will be the value of the File object's type property.

返回值

A File 对象。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`BlobBuilder` 弃用非标	Chrome 8 Prefixed 8 Prefixed Prefixed Implemented with the vendor prefix: Webkit	Edge 79 Prefixed 79 Prefixed Prefixed Implemented with the vendor prefix: Webkit 不支持 ≤18 — 79 不支持 12 — 79 Prefixed Prefixed Implemented with the vendor prefix: MS	Firefox 6 — 18 Prefixed 不支持 6 — 18 Prefixed Prefixed Implemented with the vendor prefix: Moz Starting in Firefox 14, using `MozBlobBuilder` will show a warning message in the web console that the use of `MozBlobBuilder` is deprecated and suggests to use `Blob` constructor instead.	IE 10 Prefixed 10 Prefixed Prefixed Implemented with the vendor prefix: MS	Opera No	Safari No	WebView Android 3 Prefixed 3 Prefixed Prefixed Implemented with the vendor prefix: Webkit	Chrome Android 18 Prefixed 18 Prefixed Prefixed Implemented with the vendor prefix: Webkit	Firefox Android 6 — 18 Prefixed 不支持 6 — 18 Prefixed Prefixed Implemented with the vendor prefix: Moz Starting in Firefox 14, using `MozBlobBuilder` will show a warning message in the web console that the use of `MozBlobBuilder` is deprecated and suggests to use `Blob` constructor instead.	Opera Android No	Safari iOS No	Samsung Internet Android 1.0 Prefixed 1.0 Prefixed Prefixed Implemented with the vendor prefix: Webkit

图例

完整支持
不支持
非标。预期跨浏览器支持较差。
弃用。不要用于新网站。

要求使用供应商前缀或不同名称。

另请参阅

元数据

最后修改： 2019 年 3 月 23 日

BlobBuilder
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