Code & explanation say left, Menu appears to move right


#1

https://www.codecademy.com/en/courses/web-beginner-en-zmn0b/0/5?content_from=make-an-interactive-website%3Ayour-first-program


This is probably a very silly question, but when we're talking about moving the menu, the explanation says: Right now, the menu is 285px past the left edge of the screen. That's why it is not visible! Inside the animate method:

a move it 0px to the left
b. make this happen over 200 milliseconds.

We now want to push the rest of the page to the left 285px. Use jQuery to select the body HTML element, animate it, and move it left 285px over 200 milliseconds.

And the code has left as well, and works as it should, but when you click it, it looks like everything slides to the right, not the left. Am I being directionally-challenged? Or am I missing a vital factor of how code works?

Thanks in advance for your help!


var main = function() {
  $('.icon-menu').click(function() {
    $('.menu').animate({
      left: '0px'
    }, 200);

    $('body').animate({
      left: '285px'
    }, 200);
  });
};
.


#2

@thebarefootcowgirl,
They use the left attribute as your coordinate's start at [0,0]

                [0]
                 +------------------
                 |
  [left:-10px;]  |     [left:10px;]

google search
== the Book ==
css left attribute site:developer.mozilla.org
https://developer.mozilla.org/en-US/docs/Web/CSS/left
== discussions / opinions ==
css why use left attribute to move to the right site:stackoverflow.com


#3

@thebarefootcowgirl,

+++++ DOM representation of push menu

If your HTML-page is loaded into memory by the Browser
the memory-layout will be build
using the rules, as defined in the Document Object Model
in short the DOM

The DOM representation of the index.html file would look like:

               html
                |
         +------+---------+
         |                |
        head             body
         |                |
    +----+----+      +----+-----------+
    |    |    |      |                |
   link link link  10div(.menu)     27div(.jumbotron)
                    |                 |
     +--------------+----+          29div(.icon-menu)
     |                   |             |
   13div(.icon-close)  18ul          30i (.fa
     |                   |             |  and .fa-bars)
    img       +-----+----++-----+    text  
              |     |     |     |    node
             19li  20li  21li  22li
              |     |     |     |
              a     a     a     a
              |     |     |     |
            text   text  text  text
            node   node  node  node

Now if you look at the DOM representation
the body-Tag is parent to
a 10div Element's Tree ( with class-attribute with class-name "menu" )
and
a 27div Element's Tree ( with class-attr. with class-name "jumbotron" set )

Now if you look in the style.css file,
with which you manage the Display of your Elements,
you will find that
the body object has the property left: 0; being set
( the body-Tree has a _start-Display at position left-0 )_

but
the .menu object has the property left: -285px; being set
and therefor the 10div-Tree is outside of Display.

In your 'app.js' file you are
CREATING a VARIABLE main
to which you assign a so-called anonymous Function
and in the FUNCTION-BODY of this anonymous Function
we are attaching our click Event-handlers
to the HTML-Elements which are
-1 carrying the "icon-menu" class-name as class-attribute
-2 carrying the "icon-close" class-name as class-attribute
( during the assignment the function is NOT executed )

You will have to add the code-line
$(document).ready( main );
which will result in the =main= Function to be executed
AFTER the Browser has set the ready Event-flag.

++++++++++ structure P u s h M e n u function
The structure of your =main= Function should look like....

  var main= function() {
     $('.icon-menu').click( function() {
           //Your animation
     });

     $('.icon-close').click( function() {
           //Your animation
      });
   };
 $(document).ready(main);

explanation of the push-menu setup
https://www.codecademy.com/forum_questions/55b3d3c1d3292f529b00005e

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

what is CSS explained site:developer.mozilla.org
https://developer.mozilla.org/en-US/docs/Web/CSS/Syntax
https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_started/What_is_CSS
https://developer.mozilla.org/en-US/docs/Web/CSS/Specificity

http://stackoverflow.com/questions/1795438/load-and-execution-sequence-of-a-web-page

++++++++++ structure P u s h M e n u function
The structure of your =main= Function should look like....

  var main= function() {
     $('.icon-menu').click( function() {
           //Your animation
     });

     $('.icon-close').click( function() {
           //Your animation
      });
   };
 $(document).ready(main);

#4

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