Responsive IFRAMEs — The Right Way (CSS Only)!
How to Auto-resize an Image to Fit into a DIV Container using CSS
Everything You Need to Know About HTML’s ‘pre’ Element
CSS selector last row from main table
https://stackoverflow.com/questions/16010791/css-selector-last-row-from-main-table
Google search – “html5 canvas layers transparency”
https://www.google.se/search?q=html5+canvas+layers+transparency
Tutorial: How To Style the HTML 5 Audio Player
https://serversideup.net/style-the-html-5-audio-element/
Play local video file with HTML5
https://jsfiddle.net/dsbonev/cCCZ2/
Use Fetch as Google for websites
https://support.google.com/webmasters/answer/6066468?hl=en
hreview-examples
http://microformats.org/wiki/hreview-examples
PDF from every page of website
https://mpdf.github.io/real-life-examples/pdf-from-every-page-of-website.html
Google: php add protection to existing pdf
https://www.google.se/search?q=php+add+protection+to+existing+pdf
Custom colored Bootstrap button
https://codepen.io/anon/pen/RdBqbY
http://blog.koalite.com/bbg/
Styling checkboxes
https://stackoverflow.com/questions/49355676/trying-to-change-color-of-custom-checkbox-label-when-checked-css-only
Text
Background
Border (darken background 10%)
Active (darken background 7.5%)