The Blob() constructor returns a new Blob object. The content of the blob consists of the concatenation of the values given in the parameter array.
The Blob() constructor returns a new Blob object. The content of the blob consists of the concatenation of the values given in the parameter array.
js
new Blob(array) new Blob(array, options)
array An iterable object such as an Array, having ArrayBuffers, TypedArrays, DataViews, Blobs, strings, or a mix of any of such elements, that will be put inside the Blob. Strings should be well-formed Unicode, and lone surrogates are sanitized using the same algorithm as String.prototype.toWellFormed().
options Optional
An object which may specify any of the following properties:
type Optional
The MIME type of the data that will be stored into the blob. The default value is the empty string, ("").
endings Optional Non-standard
How to interpret newline characters (\n) within the contents, if the data is text. The default value, transparent, copies newline characters into the blob without changing them. To convert newlines to the host system's native convention, specify the value native.
A new Blob object containing the specified data.
js
const array = ['<q id="a"><span id="b">hey!</span></q>']; // an array consisting of a single string const blob = new Blob(array, { type: "text/html" }); // the blob
| Specification |
|---|
| File API # constructorBlob |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
Blob |
20 | 12 | 13Before Firefox 16, the second parameter, when set tonull or undefined, leads to an error instead of being handled as an empty dictionary. |
10IE10 throwsInvalidStateError with a TypedArray argument. Consider using MSBuilder as an alternative. |
12 | 6 | 4.4 | 25 | 14Before Firefox 16, the second parameter, when set tonull or undefined, leads to an error instead of being handled as an empty dictionary. |
12 | 6 | 1.5 |
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https://developer.mozilla.org/en-US/docs/Web/API/Blob/Blob