css - jQuery class selector "class_name" vs ".class_name" -


when looking through jquery examples, see css classes referred prepending "." , other times without. example, in snippet codecademy: 

else if(event.which === 110) {   var currentarticle = $('.current');   var nextarticle = currentarticle.next();    currentarticle.removeclass('current');

why selector $('.current') needed in 2nd line, ('current') required in 4th line?

that convention.

on 2nd line $('.current') telling jquery search called "current" , dot specifies class. need call ".current"

on 4th line, you're telling jquery going select class using "removeclass" don't need use dot there. because "removeclass current being class"


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