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CSS jQuery Basics (2014) Creating a Simple Drawing Application Using on()

San Francisco
San Francisco
28,373 Points
Posted by San Francisco
San Francisco
28,373 Points

On line 6 of app.js, fix the code so that when you add a color li dynamically the click handler will still work.

Also, the app does not work at all in workspaces...I'm using safari...maybe bugginess or PEBUAK or?

js/app.js 
//Problem: No user interaction causes no change to application
//Solution: When user interacts cause changes appropriately
var color = $(".selected").css("background-color");

//When clicking on control list items
//$(".controls li").click(function(){
  $(".controls").on("click", "li", fuction() {
  //Deselect sibling elements
  $(this).siblings().removeClass("selected");
  //Select clicked element
  $(this).addClass("selected");
  //cache current color
  color = $(this).css("background-color");
});

//When "New Color" is pressed
$("#revealColorSelect").click(function(){
  //Show color select or hide the color select
  changeColor();
  $("#colorSelect").toggle();
});

//update the new color span
function changeColor() {
  var r = $("#red").val();
  var g = $("#green").val();
  var b = $("#blue").val();
  $("#newColor").css("background-color", "rgb(" + r + "," + g +", " + b + ")");
}

//When color sliders change
$("input[type=range]").change(changeColor);

//When "Add Color" is pressed
$("#addNewColor").click(function(){
  //Append the color to the controls ul
  var $newColor = $("<li></li>");
  $newColor.css("background-color", $("#newColor").css("background-color"));
  $(".controls ul").append($newColor);
  //Select the new color
  $newColor.click();
});

//On mouse events on the canvas
  //Draw lines
index.html 
<!DOCTYPE html>
<html>
<head>
    <title>Simple Drawing Application</title>
    <link rel="stylesheet" href="css/style.css" type="text/css" media="screen" title="no title" charset="utf-8">
</head>
<body>
    <canvas width="600" height="400"></canvas>
    <div class="controls">
        <ul>
            <li class="red selected"></li>
            <li class="blue"></li>
            <li class="yellow"></li>
        </ul>
        <button id="revealColorSelect">New Color</button>
        <div id="colorSelect">
            <span id="newColor"></span>
            <div class="sliders">
                <p>
                    <label for="red">Red</label>
                    <input id="red" name="red" type="range" min=0 max=255 value=0>
                </p>
                <p>
                    <label for="green">Green</label>
                    <input id="green" name="green" type="range" min=0 max=255 value=0>
                </p>
                <p>
                    <label for="blue">Blue</label>
                    <input id="blue" name="blue" type="range" min=0 max=255 value=0>
                </p>
            </div>
            <div>
            <button id="addNewColor">Add Color</button>
            </div>
        </div>
    </div>
    <script src="//code.jquery.com/jquery-1.11.0.min.js" type="text/javascript" charset="utf-8"></script>
    <script src="js/app.js" type="text/javascript" charset="utf-8"></script>    
</body>
</html>

1 Answer

Marcus Parsons
Marcus Parsons
15,719 Points

Hello San Francisco,

It looks like you put "fuction" instead of "function" inside of your event handler.

Marcus Parsons
Marcus Parsons
15,719 Points

Nice name by the way :P

San Francisco
San Francisco
28,373 Points
San Francisco
San Francisco
28,373 Points

I knew I was "fuct" lololol thanks bud

Marcus Parsons
Marcus Parsons
15,719 Points

Pun, pun, puuuun! No problem, witty city!