Late to the party but…. there is this Chrome plugin which allows you to see the “scripted records” list from the sames record screen.

NetSuite Scripted Records

https://chrome.google.com/webstore/detail/netsuite-scripted-records/dkhjafbceiceaidnbbilhphhkanlpkkj?hl=fil

I’ve seen that before when using URLs. The entity c refers to a &c=x in the string.

require(["N/ui/message"], function(message_1){

var messagePrompt = message_1.create({
    title: "Foo",
    message: "BAR",
    duration: 5000,
    type: message_1.Type.ERROR
});

messagePrompt.show();
});

Available types:
Type {
    CONFIRMATION, // A green background with a checkmark icon.
    INFORMATION,  // A blue background with an Information icon.
    WARNING,      // A yellow background with a Warning icon.
    ERROR,        // A red background with an X icon.
}

Have you tried?

var myData = {foo:”bar”};
warning.defaultValue = “<script>NS.jQuery(function($){ require([‘/SuiteScripts/pathToClientScript/myClientScript’], function(a){ a.showMessage(‘” + JSON.stringify(myData) + “‘);});});</script>”;