N/file Module
File.isOnline
Property Description: The Available without Login status of a file. If set to true, users can download the file outside of a current NetSuite login session. The default value is false. This property holds the value of the Available without Login setting found on the file record. It does not reflect the value of the Available Without Login setting found on the Suitelet script deployment record. The Available without Login setting is primarily used for SuiteCommerce websites. When this setting is enabled, websites can access media files in the NetSuite File Cabinet without a current NetSuite login session.
Type: boolean
Supported Script Types: Server-side scripts For more information, see SuiteScript 2.0 Script Types.
Module: N/file Module
Since: 2015.2
Search NetSuite - https://system.netsuite.com/app/help/helpcenter.nl?search=File.isOnline

// Code Example 1

//Add additional code

//...

var fileObj = file.load({

    id: 'Images/myImageFile.jpg'

});

fileObj.isOnline = true;

var fileId = fileObj.save();

//...

//Add additional code



//SOURCE: https://system.netsuite.com/app/help/helpcenter.nl?fid=section_4229270451.html