How to check whether a field is Read Only or not from Client Script.

Lohith · ‎12-24-2015

Hi All,

Could you please help me in how to know whether a particular field is Read only or not from Client Script. Like i want to know whether a field "request_state" is read only or not in sc_request table from script.

Thanks and Regards

Lohith.

Joris Scharpff · ‎08-30-2016

Hello,

We found a solution to this problem by inspecting the form HTML. For every field on the form ServiceNow generates a status span that keeps track of the current field input status. When the field is set to read-only, either by the server or through a client script, this field has the class 'read_only'. Therefore we use the following function to check if a field is readonly:

function( fieldname ) {

var elem = document.getElementById( 'status.' + g_form.getTableName() + '.' + fieldname );

return elem.hasClassName( 'read_only' );

}

Hope this helps!

Joris

View solution in original post

navakanth · ‎08-30-2016

Lohith,

I would recommend to use g_form.isDisabled(<field_name>) API. It does not work for catalog variables on req-item but this API should work for any Platform form. This will ensure compatibility for future releases.

You can use custom one for the catalog variables.

Thanks, Nava.

aasch · a month ago

Thank you for this, looks like this still works.

I wish this would be in the documentation, to make it feel more "official" and thus dependable.