Homework/14/script.js

// jsonPost("http://students.a-level.com.ua:10012", {func: "getMessages", messageId: 0}.then(r => console.log(r)))

function jsonPost(url, data) {
    return new Promise((resolve, reject) => {
        var x = new XMLHttpRequest();
        x.onerror = () => reject(new Error('jsonPost failed'))
        //x.setRequestHeader('Content-Type', 'application/json');
        x.open("POST", url, true);
        x.send(JSON.stringify(data))

        x.onreadystatechange = () => {
            if (x.readyState == XMLHttpRequest.DONE && x.status == 200) {
                resolve(JSON.parse(x.responseText))
            } else if (x.status != 200) {
                reject(new Error('status is not 200'))
            }
        }
    })
}

send.onclick = function () {
    console.log('1');
    jsonPost("http://students.a-level.com.ua:10012", {func: 'addMessage', nick: "Anon", message: 'Я не умею копипастить в консоль, зато умею жать красную кнопку.'})
}