I’ve been checking the UK job boards every few months to figure out what skills are most in demand. Between August and December this year, there has been a slight decline overall (perhaps seasonal), but the following tech has risen dramatically:
HTML5: 3520 - 4904
CSS3: 2372 - 3855
Node: 1034 - 1274
The figures for generic HTML and CSS are basically steady, so there seems to be a genuine jump in demand for the new versions, not just a change in how people are referring to them.
This tech has dropped:
jQuery: 4206 - 3734
Angular: 1887 - 1677
Can’t be sure why Angular is dropping. Maybe the shift to Angular 2 has put people off. (React is stable, but still lower than Angular.) As for the decline in jQuery: could be the new capabilities of HTML5, could be better browsers. I’m really not qualified to judge.
Notes: these figures are from indeed.co.uk and were obtained by searching for “web developer” + the language / library listed above.