Usage.html

// begin-snippet: Guid
function newGuid() {
    return ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c =>
        (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4)
            .toString(16)
            .toUpperCase()
    )
}
// end-snippet

// begin-snippet: PostToBus
function PostToBus() {
    var message = new Object();
    message.Property1 = document.getElementById("property1").value;
    message.Property2 = document.getElementById("property2").value;
    var jsonString = JSON.stringify(message);

    var data = new FormData();
    var files = document.getElementById("files").files;
    for (var i = 0; i < files.length; i++) {
        data.append('files[]', files[i], files[i].name);
    }
    data.append("message", jsonString);

    var postSettings = {
        method: 'POST',
        credentials: 'include',
        mode: 'cors',
        headers: {
            'MessageType': 'SampleMessage',
            'MessageNamespace': 'SampleNamespace',
            'MessageId': newGuid(),
            'Destination': 'Endpoint'
        },
        body: data
    };

    return fetch('SendMessage', postSettings);
}
// end-snippet