Adding a custom js to backend - Magento 2

#magento2

To add a JS througout backend in Magento, I followed the following method.

1.Add the head tag in Paboda/Demo/view/adminhtml/layout/default.xml

<?xml version="1.0"?>

<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
    <head>
        <link src="Paboda_Demo::js/lib/custom.js"/>
    </head>
</page>

2.Add the custom.js file to the following path Paboda/Demo/view/adminhtml/web/js/lib/custom.js