This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. 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