Конструктор Blob() возвращает новый объект Blob. Содержимое blob состоит из объединённых значений, переданных в параметре array.


var aBlob = new Blob( array, options );


  • array - массив Array из объектов ArrayBuffer, ArrayBufferView (en-US), Blob, DOMString, или смесь любых из подобных объектов, которая может быть размещена внутри Blob. DOMStrings представлены в кодировке UTF-8.
  • options is an optional BlobPropertyBag dictionary which may specify the following two attributes:
    • type, with a default value of "", that represents the MIME type of the content of the array that will be put in the blob.
    • endings, with a default value of "transparent", that specifies how strings containing the line ending character \n are to be written out. It is one of the two values: "native", meaning that line ending characters are changed to match host OS filesystem convention, or "transparent", meaning that endings are stored in the blob without change. Это API не было стандартизировано.


var aFileParts = ['<a id="a"><b id="b">hey!</b></a>']; // an array consisting of a single DOMString
var oMyBlob = new Blob(aFileParts, {type : 'text/html'}); // the blob


Specification Status Comment
File API
Определение 'Blob()' в этой спецификации.
Рабочий черновик Initial definition.

Браузерная совместимость

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! (en-US)

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 20 13.0 (13.0) [1] 10 12.10 8
in Workers ? 14.0 (14.0) ? ? ?
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? 13.0 (13.0) [1] Нет ? ?
in Workers ? 14.0 (14.0) Нет ? ?

[1] Before Firefox 16, the second parameter, when set to null or undefined, leads to an error instead of being handled as an empty dictionary.

See also