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The WindowBase64 helper contains utility methods to convert data to and from base64, a binary-to-text encoding scheme. For example it is used in data URIs.

There is no object of this type, though the context object, either the Window for regular browsing scope, or the WorkerGlobalScope  for workers, implements it.

Properties

This helper neither defines nor inherits any properties.

Methods

This helper does not inherit any methods.

WindowBase64.atob()
Decodes a string of data which has been encoded using base-64 encoding.
WindowBase64.btoa()
Creates a base-64 encoded ASCII string from a string of binary data.

Specifications

Specification Status Comment
HTML Living Standard
Определение 'WindowBase64' в этой спецификации.
Живой стандарт No change since the latest snapshot, HTML 5.1.
HTML 5.1
Определение 'WindowBase64' в этой спецификации.
Рекомендация Snapshot of HTML Living Standard. No change.
HTML5
Определение 'WindowBase64' в этой спецификации.
Рекомендация Snapshot of HTML Living Standard. Creation of WindowBase64 (properties where on the target before it).

Browser compatibility

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!

Feature Firefox (Gecko) Chrome Internet Explorer Opera Safari
Basic support 1.0 (1.7 или ранее) [1] (Да) 10.0 (Да) (Да)
Feature Firefox Mobile (Gecko) Android IE Mobile Opera Mobile Safari Mobile
Basic support 1.0 (1) (Да) (Да) (Да) (Да)

[1]  atob() is also available to XPCOM components implemented in JavaScript, even though Window is not the global object in components.

See also

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