post to slack channel

post_message.js

const fetch = require('node-fetch');

function post_message(channel, text) {
    const obj = {
        token: 'xoxb-aaaaaaaaaaa',
        channel,
        as_user: true,
        text
    };
    fetch('https://slack.com/api/chat.postMessage', {
        method: 'POST',
        body: Object.keys(obj).map((key) => key + '=' + encodeURIComponent(obj[key])).join('&'),
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded; charset=utf-8'
        }
    })
}