Purpose of the crossorigin attribute...?

html cross-domain
Smurfette picture Smurfette · Aug 20, 2013 · Viewed 59.6k times · Source

In both image and script tags.

My understanding was that you can access both scripts and images on other domains. So when does one use this attribute?

Is this when you want to restrict the ability of others to access your scripts and image?

Images:

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-crossorigin

Scripts:

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script

Answer

T.J. Crowder picture T.J. Crowder · Aug 20, 2013

The answer can be found in the specification.

For img:

The crossorigin attribute is a CORS settings attribute. Its purpose is to allow images from third-party sites that allow cross-origin access to be used with canvas.

and for script:

The crossorigin attribute is a CORS settings attribute. It controls, for scripts that are obtained from other origins, whether error information will be exposed.

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