demo: https://alimahdiyar.github.io/simple-front-project/
http://javascript.info/first-steps
https://www.w3schools.com/ (html, css, jquery)
div, input, textarea, button
color, width, height, font (and related properties), text-align, text-decoration, padding, margin, backgroud-color, border-rardius, float, display, flex-wrap, overflow media queries and responsive design (full chapter of https://www.w3schools.com/css/css_rwd_intro.asp)
basic syntax, variables, functions
click, on, ready, hide, show, val, html, append, parent, children, remove