How to get d3.js tree layout to sort nodes alphabetically?

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var tree = d3.layout.tree()
    .sort(function(a, b) {
        return d3.ascending(a.name, b.name); // sort nodes alphabetically based on their property "name"
    });

// Rest of your code to create the tree layout...

// Call the root node of the tree layout and sort its children
root.children.sort(function(a, b) {
    return d3.ascending(a.name, b.name);
});

// Continue sorting children recursively for each node in the tree
function sortChildren(node) {
    if (node.children) {
        node.children.sort(function(a, b) {
            return d3.ascending(a.name, b.name);
        });
        node.children.forEach(function(child) {
            sortChildren(child);
        });
    }
}

sortChildren(root);

// Finally, update the tree layout with the newly sorted nodes