Onchange client script to set value on hidden variable

[CE_]

Hi,

I have a hidden field in a form that I need to set value on. Is this possible with on change script?
If variable A has answer "no" then variable B is not visible. But variable B should then be set to "abc". 
So can I use on change client script to set value on this hidden variable? I tried but got "Javascript error in your browser console".

Thanks,

[Shamma Negi]

Dont hide the field on Load rather hide the field from same onchange client script by wriitng below script. In the same onchange script check and hide

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

    if (isLoading || newValue == '') {

        return;

    }

    var one = g_form.getValue('variable_1');

    if (one == 'No') {

        g_form.setValue('variable_2', 'Sample set value ');   //First set the value you want

        g_form.setDisplay('variable_2', false);  // then hide the field

    } else {

        g_form.setDisplay('variable_2', true);

    }

    //Type appropriate comment here, and begin script below

}

[Prashant Ahire]

@Shamma Negi 

I guess this solution is already given by me.

[Shamma Negi]

Please check if else condition. The original post says that If variable A has answer "no" then variable B is not visible. But variable B should then be set to "abc". So I modified the script accordingly.

[Prabhjot Kaur4]

Hi,

Write onchange Client Script on 'variable A' not on hidden 'variable B'.

When 'variable A' gets change then set the 'variable B' value.

Thanks

Prabhjot

[Rajesh_Bhise]

Hello @CE_ ,

As per the ServiceNow best practice, please make the hidden field visible, set it's value and then hide it.

this is similar to make field non-mandatory and hide it on the form.

You can use the script given by @Prashant Ahire and fulfill your requirement.

Hope this helps your query and understand things behind.

Kindly mark my answer has helpful‌‌ and solution proposed‌‌ if this helps you.

Happy to help you in future.😍

Thank You,
Rajesh