Can someone redirect me to a web resource, where I can find list of all widgetVar
JavaScript functions list, eg. toggle(), show(), hide () etc etc.
Appr
You can find the JavaScript sources of all widgets at GitHub. For example: datatable.js.
You can also open your browser's JavaScript console and type:
PF('yourWidget').__proto__
That will give you the properties list (including functions). Try it at http://www.primefaces.org/showcase/ui/data/datatable/filter.xhtml
PF('carsTable').__proto__
In Chrome this results in an object with collapsible nodes:
▼ c {SORT_ORDER: Object}
▶ SORT_ORDER: Object
▶ _render: function()
▶ addGhostRow: function()
▶ addResizers: function()
▶ addRow: function()
▶ addSelection: function(a)
▶ addSortMeta: function(a)
...
Also, next to the showcase there is also documentation you should have a look at. For many components the client side API is well documented, see for example: https://primefaces.github.io/primefaces/8_0/#/components/datatable?id=client-side-api