CrossOrigin enum
Indicates if the fetching of the media must be done using a CORS request. Media data from a CORS request can be reused in the <canvas> element without being marked "tainted". If the crossorigin attribute is not specified, then a non-CORS request is sent (without the Origin request header), and the browser marks the media as tainted and restricts access to its data, preventing its usage in <canvas> elements. If the crossorigin attribute is specified, then a CORS request is sent (with the Origin request header); but if the server does not opt into allowing cross-origin access to the media data by the origin site (by not sending any Access-Control-Allow-Origin response header, or by not including the site's origin in any Access-Control-Allow-Origin response header it does send), then the browser blocks the media from loading, and logs a CORS error to the devtools console.
Constructors
- CrossOrigin(String value)
-
const
Values
- anonymous → const CrossOrigin
-
Sends a cross-origin request without a credential. In other words, it sends the Origin: HTTP header without a cookie, X.509 certificate, or performing HTTP Basic authentication. If the server does not give credentials to the origin site (by not setting the Access-Control-Allow-Origin: HTTP header), the image will be tainted, and its usage restricted.
const CrossOrigin('anonymous')
- useCredentials → const CrossOrigin
-
Sends a cross-origin request with a credential. In other words, it sends the Origin: HTTP header with a cookie, a certificate, or performing HTTP Basic authentication. If the server does not give credentials to the origin site (through Access-Control-Allow-Credentials: HTTP header), the image will be tainted and its usage restricted.
const CrossOrigin('use-credentials')
Properties
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Constants
-
values
→ const List<
CrossOrigin> - A constant List of the values in this enum, in order of their declaration.