This is fairly simple to do with annotations on a standard form. The first thing you need to do is construct your annotation in a specific way...using an HTML annotation with a uniquely-identifiable container element that you can show and hide with your script. Something like this should work...
Here is the annotation text with HTML as shown in the screenshot for easier copying...
<span id="my_annotation">Here is my annotation message text!</span>Once you've got your annotation set up correctly you can use DOM manipulation in a client script or UI policy script to target the element and show and hide it whenever you want. Generally DOM manipulation is frowned upon because you can't control what ServiceNow does with the HTML of forms in the future, but in this case, the risk is much lower since you control the ID.
Here's an example of a working client script to show and hide the annotation above based on changes to the category value on an incident. If you're on a London ServiceNow release note that you need to un-check the 'Isolate script' checkbox so that your DOM manipulation script can run without issue.
Here's the script above for easy copying...
function onChange(control, oldValue, newValue, isLoading, isTemplate) {
if (isLoading || newValue === '') {
return;
}
// Hide annotation if 'category' is 'hardware'. Show otherwise
if (g_form.getValue('category') == 'hardware') {
// Hide the annotation
$('my_annotation').up().hide();
}
else {
// Show the annotation
$('my_annotation').up().show();
}
}Please mark this response correct if I've answered your question. Thanks!
