We're looking for a person or people to help audit MDN to find places we could speed up. Is this you or someone you know? Check out the RFP: https://mzl.la/2IHcMiE


This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. Avoid using it and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

Set the runtime-wide principals transcoder callback. This function is deprecated. In SpiderMonkey 1.8.1 or later, use JS_SetRuntimeSecurityCallbacks instead.


JSPrincipalsTranscoder JS_SetPrincipalsTranscoder(JSRuntime *rt,
                                                  JSPrincipalsTranscoder px);
Name Type Description
rt JSRuntime * The runtime to configure.
px JSPrincipalsTranscoder  The new principals transcoder.


JS_SetPrincipalsTranscoder sets a runtime-wide callback which the JavaScript engine uses to serialize and deserialize principals. This callback is described at JSPrincipalsTranscoder.

JS_SetPrincipalsTranscoder returns the previous principals transcoder.

MXR ID Search for JS_SetPrincipalsTranscoder

Document Tags and Contributors

 Contributors to this page: fscholz, Jorend, Jimb
 Last updated by: fscholz,