lium 0.1.2

Abstraction Layer of ChromiumOS development
Documentation 
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<!DOCTYPE html>
<html>

<head>
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <title>serial_console</title>
    <style>
        body {
            margin: 0;
            padding-bottom: 3rem;
            font-family: monospace;
        }


        #select {
            height: 2rem;
        }

        #form {
            background: rgba(0, 0, 0, 0.15);
            padding: 0.25rem;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            display: flex;
            height: 3rem;
            box-sizing: border-box;
            backdrop-filter: blur(10px);
        }

        #input {
            border: none;
            padding: 0 1rem;
            flex-grow: 1;
            border-radius: 2rem;
            margin: 0.25rem;
        }

        #input:focus {
            outline: none;
        }

        #form>button {
            background: #333;
            border: none;
            padding: 0 1rem;
            margin: 0.25rem;
            border-radius: 3px;
            outline: none;
            color: #fff;
        }

        #messages {
            list-style-type: none;
            margin: 0;
            padding: 0;
            height: calc(100vh - 5rem);
            box-sizing: border-box;
            overflow-y: scroll;
        }

        #messages>li {
            padding: 0.5rem 1rem;
        }

        #messages>li:nth-child(odd) {
            background: #efefef;
        }
    </style>
</head>


<body>
    <button id="select">select serial</button>
    <ul id="messages"></ul>
    <form id="form" action="">
        <input id="input" autocomplete="off" /><button>Send</button>
    </form>
</body>
<script>
    const selectButton = document.getElementById('select');
    const messages = document.getElementById('messages');
    const encoder = new TextEncoder();
    const decoder = new TextDecoder();
    let port;

    function addListItem(listItem) {
        messages.appendChild(listItem);
        messages.scrollTo(0, messages.scrollHeight);
    }

    selectButton.addEventListener('click', async () => {
        port = await navigator.serial
            .requestPort()
            .catch((e) => { console.error(e); });
        await port.open({ baudRate: 115200 });
        let listItem = document.createElement("li");
        listItem.textContent = "port is selected";
        messages.appendChild(listItem);

        const reader = port.readable.getReader();

        listItem = document.createElement("li");
        messages.appendChild(listItem);
        reader.read().then(function processText({ done, value }) {
            if (done) {
                console.log("Stream complete");
                return;
            }

            const chunk = decoder.decode(value, { stream: true });
            chunk_split_list = chunk.split("\n");

            for (let i = 0; i < chunk_split_list.length - 1; i++) {
                listItem.textContent += chunk_split_list[i];
                listItem = document.createElement("li");
                messages.appendChild(listItem);
            }
            listItem.textContent += chunk_split_list[chunk_split_list.length - 1];
            messages.scrollTo(0, messages.scrollHeight);

            return reader.read().then(processText);
        });
    });

    form.addEventListener('submit', async (e) => {
        e.preventDefault();
        if (port === undefined) {
            window.alert("serial port is not selected");
        } else {
            const writer = port.writable.getWriter();
            await writer.write(encoder.encode(input.value + '\n'));
            input.value = "";
            writer.releaseLock();
        }
    });
</script>

</html>