, ManipUni wrote

*snip*

Most of those lists are based on number of job adverts containing key words, but as you and I well know Javascript is rarely explicitly listed in the advert even if it is almost always an expected part of the job role.    

"Web Developer" - Javascript 
"ASP.net" - Javascript
"PHP" - Javascript
"Java, Tomcat, enterprise systems" - Javascript 
etc

*snip*

At the same time, NONE of those positions would be for programming exclusively in JavaScript or mostly in JavaScript or even 50% in JavaScript.