Reader.The Blob object represents a blob, which is a file-like object of immutable, raw data they can be read as text or binary data, or converted into a ReadableStream so its methods can be used for processing the data.īlobs can represent data that isn't necessarily in a JavaScript-native format. The following code reads the content of a Blob as a typed array: var reader = new FileReader() One way to read content from a Blob is to use a FileReader. now you can use the url in any context that regular URLs can be used in, for example img.src, etc. For example, to construct a blob from string: var debug = ) // pass a useful mime type here The Blob() constructor allows one to create blobs from other objects. Methods Blob.slice(]]) Returns a new Blob object containing the data in the specified range of bytes of the source Blob. If the type is unknown, this string is empty. Blob.type Read only A string indicating the MIME type of the data contained in the Blob.

Properties Blob.size Read only The size, in bytes, of the data contained in the Blob object. Constructor Blob(blobParts) Returns a newly created Blob object whose content consists of the concatenation of the array of values given in parameter.

The support for blob.mozSlice() has been dropped with Firefox 30. An old version of the slice() method, without vendor prefixes, had different semantics, and is obsolete. Note: Be aware that the slice() method has vendor prefixes on some browsers and versions: blob.mozSlice() for Firefox 12 and earlier and blob.webkitSlice() in Safari.

Blob opera not working