Matthew Bodily
Lecture Slides for DevMountain's Web Development Course
TO ES6 AND BEYOND!
But first...
Staying up to date on web development
- YouTube
- Podcasts
- Meetups
- NPM/StackOverflow Trends
JavaScript
JavaScript, which follows a standardization called ECMAscript (that's why we call it ES6+), has a yearly release. Some releases are larger than others. ES6 was a notably large release
But who chooses what ECMAscript looks like?
- You
TC39
Technical Committee 39. A group of developers who propose changes to ECMAscript. The proposals go through several different stages until they are implemented.
TC39 Proposal Stages
- Stage 0: Strawman - Seeking input on the proposal
- Stage 1: Proposal - Define the why and challenges from adding proposal
- Stage 2: Draft - Define a specific syntax for proposal
- Stage 3: Candidate - Refine proposal
- Stage 4: Finished - Ready for the next release of ECMA
SemVer
Semantic Versioning. Most programming languages/libraries follow semver for releases
ES6
Promises
A promise has three parts:
-
Pending - anything could happen
-
Fulfilled - Everything is good
-
Rejected - Everything is awful
Promises are an alternative to nesting callbacks
ES7
Only two features were released with ES7
ES8
Some useful features here with Async functions being the most popular
Async/Await
A function that returns a promise. Every function can be converted to async/await
ES9
A lot of small additions to regex and some minor updates to spread.
Copy of Copy of TO ES6 AND BEYOND!
By Matthew Bodily
