how can I get var in the script function?

I want to get in js function value. how can i get them?

I use html and javascript and alloy-ui

I test in chrome developer console. staY.diagrambuilder or staY.Y or make function name.

<script>
 var staY = YUI().use(
    'aui-diagram-builder',

    function (Y) {
var diagrambuilder = new Y.DiagramBuilder({
            availableFields: availableFields,
            boundingBox: '#diagrambuilderBB',
            srcNode: '#diagrambuilderBB',
            fields: []
        });
console.log(diagrambuilder); //i want to access variable out of this script
});
</script>

how can i get diagrambuilder variable in chrome developer console?

<script>
var diagrambuilder = null;
var staY = YUI().use(
    'aui-diagram-builder',

    function (Y) {
diagrambuilder = new Y.DiagramBuilder({
            availableFields: availableFields,
            boundingBox: '#diagrambuilderBB',
            srcNode: '#diagrambuilderBB',
            fields: []
        });
console.log(diagrambuilder); //i want to access variable out of this script

diagramInitialized();

});

function diagramInitialized() {
    console.log('If you are seeing this thenm diagrambuilder is available in global scope'); //it is accessible now;
    console.log(diagrambuilder); //it is accessible now;
}
</script>

Is this what you want? @user9041996