Last update: May 22, 2026
- Topics:
- Identities
- Integrations
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getMarketingCloudVisitorID returns the ECID.
Syntax: var *variable name* = visitor.getMarketingCloudVisitorID()
This method typically used with custom solutions that require reading the visitor ID. It is not used by a standard implementation. getMarketingCloudVisitorID also works with callback functions to read Analytics IDs and bring them in to your system or application.
//callback function
var useMarketingCloudID = function(id){
//whatever your function does with the ECID
};
//get the ECID and pass it to the function
var mcID = visitor.getMarketingCloudVisitorID(useMarketingCloudID)
TIP
If you’re an Analytics customer, also check for and send the Analytics ID to your function. For example, you would want both identifiers when passing the visitor ID in a hidden form element to a server-side application that uses the data insertion API. In this case, you should collect and return the ECID and Analytics visitor IDs. See Get Analytics Visitor ID.
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