The below was provided mostly by ServiceNow support:
Steps to Resolution:
1) Set the field in question (or create a custom field) to Type: HTML
2) In the dictionary for the field, create an attribute for HTML Sanitize and set the value to false.
3) Create a business rule that auto inserts code tags and sets the Style to display: block
4) [OPTIONAL] I created another onDisplay business rule that wiped out the field so the content of the field did not linger.
Additional details
2. add html_sanatize=false to the attributes of the new html field.
3. add on before business rule to field
function onBefore(current, previous) {
//If no opening [code] tag found, wrap it.
var note = current.work_notes + "";
if (note.indexof("[code]") == -1) {
var wrappedNote = "[code]" + note + "[/code]";
note = wrappedNote;
}
// Clunky workaround to inject style attribute into image tags.
var noteStyle = note.replace(/\<img style\=\"/g, "\<img style\=\"display\: block\; ");
if (note != noteStyle) {
current.work_notes = noteStyle;
}
}
4. you will find that HTML fields do not clear field contents after submit so you can create an onDisplay script to clear the filed:
current.field_name = '';
NOTE: At this time this will prevent the Additional Comments block form generating correctly in notifications
Edit: fixed .replace as per Leslie's suggestion.
