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JavaScript jQuery Basics (2014) Creating a Simple Drawing Application Perform: Part 2

Posted by mebula
mebula
4,931 Points

Color Span Not Updating Until I Toggle Sliders

Sorry if the question title is confusing! My JS code is below. It works pretty much the same as Andrew's does in the video, however when I first click the "new color" button, the span to the left of the sliders doesn't show anything. Once I move the sliders around, it gets updated, but upon the initial popup of it, it doesn't show anything. In the video, Andrew's automatically shows up as black.

Does anybody know how to fix this? Thanks!

var color = $(".selected").css("background-color");

$(".controls li").click(function() {
  $(this).siblings().removeClass("selected");
  $(this).addClass("selected");
  color = $(this).css("background-color");
});

$("#revealColorSelect").click(function() {
  $("#colorSelect").toggle();
});

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

$("input[type=range]").change(changeColor);

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

You missed a modification in the video.

near the end of the video this problem is addressed by adding a line:

$("#revealColorSelect").click(function() {
  changeColor():                  // <-- this line gets added
  $("#colorSelect").toggle();
});

Also, if I remember correctly, I found the color picker much more fun to use when I made this modification to the last line:

$("input[type=range]").on("input", changeColor);