Service Portal throws "Unhandled exception in GlideAjax" error in the console when a client script uses evalJSON() - Support and Troubleshooting

Service Portal throws "Unhandled exception in GlideAjax" error in the console when a client script uses evalJSON() Description Console throws an error "Unhandled exception in GlideAjax" in Service Portal on a catalog item with a client script that uses evalJSON();

Cause This is caused as evalJSON() is not supported in the portal and returns null.

Resolution Use JSON.parse() instead in the client script.

For example change the client script from:

var ga = new GlideAjax('GetUserInfo'); ga.addParam('sysparm_name', 'getUserInfo'); ga.getXML(updateUserInfo);

function updateUserInfo(response){ var answer = response.responseXML.documentElement.getAttribute("answer"); if(answer){ var data = answer.evalJSON(true); g_form.setValue('employee_username', data.user_name);

} }

To:

var ga = new GlideAjax('GetUserInfo'); ga.addParam('sysparm_name', 'getUserInfo'); ga.getXML(updateUserInfo);

function updateUserInfo(response){ var answer = response.responseXML.documentElement.getAttribute("answer"); if(answer){ var data = JSON.parse(answer); g_form.setValue('employee_username', data.user_name);

} }