Option "-- None --" is not appearing onChange

[mkdj12]

I'm using this onChange script to toggle what options are accessible from this select box variable. But for some reason the only option that doesn't appear is "-- None --". The field always selects the first option by default which is breaking other logic within the form. I've attempted to check the option on the variable to "include none" but that hasn't worked either. 

function onChange(control, oldValue, newValue, isLoading) {

    if (isLoading || newValue == '') {
       return;
    }
    var topic = g_form.getValue('topic_of_request');
    if (topic == "brand_storytelling") {
        g_form.clearOptions('category');
        g_form.addOption('category', 'none', '-- None --');
        g_form.addOption('category', 'campaign', 'Campaign');
        g_form.addOption('category', 'menu', 'Menu');
        g_form.addOption('category', 'customer_comment', 'Customer Comment');

    } else if (topic == "issues_management") {
        g_form.clearOptions('category');
        g_form.addOption('category', '', '-- None --');
        g_form.addOption('category', 'disaster_crisis', 'Disaster/Crisis');
        g_form.addOption('category', 'food_safety', 'Food Safety');
        g_form.addOption('category', 'supply_chain', 'Supply Chain');
        g_form.addOption('category', 'diversity_inclusion', 'Diversity & Inclusion');
        g_form.addOption('category', 'political_social_cause', 'Political or Social Cause');
    } else {
        g_form.clearOptions('category');
    }
}

[sachin_namjoshi]

use below solution

https://community.servicenow.com/community?id=community_question&sys_id=85608e91dbfbd7805ed4a851ca961991

Regards,

Sachin

[Anurag Tripathi]

Hi,

What happens if you add this at the end of addOption

g_form.setValue('category', '');

PS: make sure that the valie fir '--None--' is '' (blank) and not 'none'

-Anurag

[mkdj12]

Tried that and it didnt work

[Anil Lande]

Hi,

Are you sure that you have only one client script running on your form?

There is a possibility of another script overriding the options .

Thanks,

Anil Lande