ReactGirl

import React from 'react';

let lastScrollY = 0;
let ticking = false;

class App extends React.Component {
  componentDidMount() {
    window.addEventListener('scroll', this.handleScroll);
  }

ReactGirl

Let's install PostgreSQL onto your operating system.

As an open source object-relational database management system, PostgreSQL available for MacOS, Linux, and Windows.

Goal for each Operating System

The goal will be to run the following command successfully from the command line (regardless of the OS):

psql -U postgres

This should open the psql interactive shell and print a prompt that looks like:

ReactGirl

/* Semantic UI has these classes, however they're only applicable to*/
/* grids, containers, rows and columns.*/
/* plus, there isn't any `mobile hidden`, `X hidden` class.*/
/* this snippet is using the same class names and same approach*/
/* plus a bit more but to all elements.*/
/* see https://github.com/Semantic-Org/Semantic-UI/issues/1114*/

/* Mobile */
@media only screen and (max-width: 767px) {
  [class*="mobile hidden"],