Drop jQuery as a prerequisite and provide a jQuery adapter

[alexanderdickson]

I will put this on hold until the native Promise object has good browser support, otherwise I would need to bundle an implementation which would make this plugin larger than required.

[sayontan]

Hi,
I see that you have created this issue for yourself quite a few years back. Given the current state of support for Promise, is it possible to now remove jQuery as a prerequisite?

I use waitForImages in a WordPress plugin (in favour of the natively bundled ImagesLoaded). I have been slowly modernizing my framework to move to ES6 as well as remove jQuery dependencies, so a vanilla JS implementation would greatly help!

[BenMorel]

+1 from me, in 2020 jQuery should not be the default anymore.

Looking forward to a vanilla JS version!