Help with dom manipulation


#1

what is wrong with this code. why there is virtually no help in the actual lessons. typed exactly like theirs.
var main = function() {
$('.btn').click(function() {
var post = $('status-box').val();
$('

  • ').text(post).prependto('posts');
    $('.status-box').val('');
    $('.counter').text(140);
    });
    
    $('.status-box').keyup(function() {
        var postlength = $(this).val().length;
        var charactersleft = 140 - postlength;
        $('.counter').text(charactersleft);
    
        if(charactersleft < 0) {
            $('.btn').addclass('disabled');
        }
        else if(charactersleft == 140) {
            $('.btn').addclass('disabled');
        }
        else {
            $('.btn').removeclass('disable');
        }
    
    
    });
    
    $('.btn').addclass('disabled');

    };

    $(document).ready(main);


  • #3

    @jford1485,
    -1
    you will have to change the prependto() jQuery-Method-name
    into _prependTo()
    http://api.jquery.com/prependto/
    -2
    you will have to change the addclass() and removeclass() jQuery-Method-name
    into removeClass() and addClass()
    https://api.jquery.com/addclass/
    -3
    In Javascript, as a code-convention,
    they use so-called =camel-style= in the writing of variable-name's
    like
    charactersLeft
    postLength


    #4

    @jford1485,
    Here some help you asked for

    - - - - - - - - - - - - S t a t u s U p d at e - - - - - - - - - -

    = = = = = = = D ocument O bject M odel = = = = =

                         2html
                           |
            |--------------+-----------|
          3head                      8body
            |                          |
      |-----|+----|                    |
      |     |     |                    |
    4link 5link 6link                9div
                                       |
      |----------------|---------------+---|--------------|
      |                |                   |              |
    10form           15div(.button-group 20ul         24script(2x)
       |                |  .pull-right)    (.posts)    25script
    11div(.form-group)  |
       |                |
    12textarea          |
        (.form-control  |
        .status-box)    |
                        |
             |----------+----|
           16p(.counter)   17a(.btn
             |               | .btn-primary)
            text            text
            node            node

    +++++++++++++++++++++++++++++++++++++++++++
    The charactersLeft variable
    is created by substracting
    the == length of the actual characters in the status-box ==
    var postLength = $('.status-box').val().length ;
    from
    the == maximum characters allowed which is 140 ==
    thus
    var charactersLeft = 140 - postLength

    Now you will have to check on 3 conditions:
    1- charactersLeft < 0
    You have put in more then 140 characters into the $('.status-box')
    thus you will want to add a class-attribute with class-name disabled
    to the HTML-Element which is allready carrying the class-name btn
    using the jQuery-method addClass()

    2- charactersLeft === 140
    You have not put any characters into the $('.status-box')
    thus you will want to add a class-attribute with class-name disabled
    to the HTML-Element which is allready carrying the class-name btn
    using the jQuery-method addClass()

    3- in all other charactersLeft cases
    you will want to make sure the btn
    does NOT have the disabled class-name set.
    Remove a class-attribute with class-name disabled
    from the HTML-Element which is allready carrying the class-name btn
    using the jQuery-method removeClass()

    This you can achieve by setting up an IF ELSE-IF ELSE construct
    like

    if ( condition1 ) {
       //Begin of IF-codeblock
    }
    else if ( condition2 ) {
       // Begin of ELSE-IF-codeblock
    }
    else {
      //You do not use a condition !!
      //Begin of ELSE-codeblock
    }

    You have to integrate the above mentioned
    into the FUNCTION-BODY
    of the $('.status-box').keydown() Event-handler.

    $('.status-box').keydown( function() {
       //Begin of FUNCTION-BODY
    
      // your code
    
      //End of FUNCTION-BODY
      }
      //END-of-keydown Eventhandler
    );

    questions---
    why is class-name -disabled- set in the =main= function
    https://www.codecademy.com/forum_questions/555071a551b8870e9a00056e

    the build of status-update function...
    https://www.codecademy.com/forum_questions/55503ca8d3292f8c2b000281