Function hasClientXY

docs/app/js/sanddance-app.js:19328–19333

(e)

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
function hasClientXY(e) {
    if (e && e.clientX !== undefined && e.clientX !== undefined) return {
        top: e.clientY,
        left: e.clientX
    };
}
function getPosition(e) {
    let xy = hasClientXY(e);
    if (xy) return xy;