static/watermelon/help/index.js

// help
var ws = new WebSocket("ws://0.0.0.0:7860/watermelon/ws");
ws.onmessage = function (event) {
    var messages = document.getElementById('messages')
    messages.innerText = event.data
};
function sendMessage(event) {
    var input = document.getElementById("command")

    var myobj = {
        url: "help",
        data: {
            command: input.value
        }
    }
    ws.send(JSON.stringify(myobj))
    event.preventDefault()
}