Presentational Attributes works almost like inline styles but there is striking difference between them. It is advisable to use them specifically on SVGs and IMG tags.
Images
Show Poster Image directly from Video
Poster image is first instance on video to impress & engage user to play video. By keeping poster image clear & from video will make user interested to click on play button.
Accessible HTML5 Video Player w/ Closed Caption (CC)
To have HTML5 Video on page is good and to have it with Closed Caption is even better, as it will make video accessible for physically challenged as well.
Introduction to Javascript Promises API
A Promise is a value not necessarily known at the time of it's creation. It mainly used in asynchronous actions resulting in success or failure. The Promises represents a value which may be available now, or in the future, or never.
Awesome Features of Google Chrome
There are few hidden features in Google's Chrome browsers which many of us are un-aware of. Here I have listed 4 of those hidden features that I'm aware of and can be very useful.