Refactor ws4redis.js

[aitanadev]

Refactor to ES6

• As ES6 Class
• eslint standard
• without jquery
• new callbacks: error, reconnecting, heartbeatTimeout
• new options: maxAttempts, maxMissedHeartbeats, heartbeatLapse, autoConnect

[DanBrink91]

this is great, removing the need to include jquery (or anything else like it) in the project. 👍

[jrief]

Even though untested, this is a great pull request!
However, how do you see the problem of not supporting ES5 anymore?
Wouldn't it be rather better to offer both version and/or offering a precompiled one.
I'm unsure how many browsers support websocket, but do not offer ES6 support. Are there any numbers?

[aitanadev]

Thank you!

websockets/ES6 support is the same 96%

https://caniuse.com/?search=es6

https://caniuse.com/?search=websockets

Partially incomplete IE11 support does not affect this commit, so full browser support is identical.

Perhaps it is possible to keep the current version as ws4redis.es5.js?

[aitanadev]

Something like:

• ws4redis.js (ES6, Eslint standard, standalone)
• ws4redis.es5.js (ES5, jquery)

Additionally, I can make another independent PR for the ws4redis.es5.js version, eliminating the need for jquery only.