I would like to invoke the saveValue function in every page but I get the below error message.
Uncaught ReferenceError: saveValue is not defined
Master page(inline script):
<script type="text/javascript">    
   var value = id;
   saveValue(value);
</script>
main.js
require( 'jquery', 'bootstrap' ], function ($, bootstrap) {
    var saveValue = function (value) {
         window.data.push(saveValue);
    };
});
