The O Shortcut


#1


Could you please advise what mistakes with my code, thank you.


var main = function() {
  $('.article').click(function() {
    $('.article').removeClass('current');  
    $('.description').hide();
    
    $(this).addClass('.current');
    $(this).children('.description').show();  
  });   
}


$(document).ready(main);
$(document).keypress(function(event) {
  if(event.which === 111) {
    $('.current').children('.description').toggle();
  }  
});


#2

@pinyol,
The structure of your code should look like

    var main=function() {
         $('.article').click(function() { 
         }); 

         $(document).keypress(function(event) {
         });
       };
      $(document).ready(main);

#3

Restructured. But, it still doesn't work. :sob:

var main = function() {
$('.article').click(function() {
$('.article').removeClass('current');
$('.description').hide();

$(this).addClass('.current');
$(this).children('.description').show();

});

$(document).keypress(function(event) {
if(event.which === 111) {
$('.current').children('.description').toggle();
}
});
};

$(document).ready(main);


#4

@pinyol,

+++++ addClass removeClass

Every HTML-Element has so called attributes.
One of the possible attributes, is the class-attribute.

If you write the HTML-document, you add the class-attribute
within the Element-Tag by using the syntax
class-keyword = then a string
containing the class-name
OR mutliple class-names which are =separated=from=eachother= by a space

Thus with

 <div class="myClass1 myClass2 myClass3" ></div>

you now have a DIV-Element carrying 3 classes myClass1, myClass2 and myClass3

As part of its CSS-category-of-Methods jQuery gives you the ability
to manipulate this class-attribute
by providing the addClass()-, removeClass()-, toggleClass()-Methods.
You will have to provide the Method at least 1 argument
which is the string VALUE of the class-name.
Thus you have to change
**$('.article').removeClass('.current')
$(this).addClass('.current')**
into
**$('.article').removeClass('current')
$(this).addClass('current')**

The confusion when to use a pre-pending dot or NOT...
In the Cascading Style Sheet syntax,
you have to prepend-a-dot to the classname
so the CSS will interpret it as a class-attribute
So in the file style.css you will find an object
identified by .current,
In this .current object
the background property-key is set to a particular VALUE

jQuery uses the same syntax to identify a class-attribute
like in the jQuery-selector
$(".current") by which this HTML-Element and all it's CHILDREN
are selected into a jQuery-object,

This parent-HTML-Element carries the class-attribute with class-name "current"

Reference::

google search
class site:jquery.com
https://api.jquery.com/category/selectors/
http://api.jquery.com/class-selector/
https://api.jquery.com/element-selector/
http://www.w3schools.com/jquery/jquery_ref_selectors.asp
http://www.w3schools.com/jquery/trysel.asp