So, I think I've passed in what I need to do my coding. It's not ideal necessarily, there might be a cleaner way, but this is what I ended up doing (following the correct answer on this community post: pass value from variable to UI macro )
This is the macro:
<?xml version="1.0" encoding="utf-8" ?>
<j:jelly trim="false" xmlns:j="jelly:core" xmlns:g="glide" xmlns:j2="null" xmlns:g2="null">
<input type="text" id="position_id" name="position_id" value=""/>
<script>
function setPosition(text){
$j("#position_id").val(text);
}
</script>
</j:jelly>
On the form, I created two client scripts, one onLoad (because the form can inherit the value from an order guide) and one onChange of the Position field.
onLoad:
function onLoad() {
setPosition(g_form.getValue('position'));
}
onChange:
function onChange(control, oldValue, newValue, isLoading) {
if (isLoading || newValue == '') {
return;
}
setPosition(newValue);
}
And now I'm finally getting the sys_id in a field (I'm going to hide it, the user doesn't need to see it, I just need it for scripting).
I get no value:
Current script:
<?xml version="1.0" encoding="utf-8" ?>
<j:jelly trim="false" xmlns:j="jelly:core" xmlns:g="glide" xmlns:j2="null" xmlns:g2="null">
<!--<j2:set var="jvar_position" value="$[current.getValue('position')]"/>-->
Output: ${current.getValue('position')}.
Output: ($[jvar_position]).
</j:jelly>
Output:
