freeCodeCamp

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id	title	challengeType	videoUrl	forumTopicId
587d78a7367417b2b2512ae2	Create Visual Direction by Fading an Element from Left to Right	0	https://scrimba.com/c/cGJqqAE	301054

Description

For this challenge, you'll change the opacity of an animated element so it gradually fades as it reaches the right side of the screen. In the displayed animation, the round element with the gradient background moves to the right by the 50% mark of the animation per the @keyframes rule.

Instructions

Target the element with the id of ball and add the opacity property set to 0.1 at 50%, so the element fades as it moves to the right.

Tests

tests:
  - text: The <code>keyframes</code> rule for fade should set the <code>opacity</code> property to 0.1 at 50%.
    testString: assert(code.match(/@keyframes fade\s*?{\s*?50%\s*?{\s*?(?:left:\s*?60%;\s*?opacity:\s*?0?\.1;|opacity:\s*?0?\.1;\s*?left:\s*?60%;)/gi));

Challenge Seed

<style>

  #ball {
    width: 70px;
    height: 70px;
    margin: 50px auto;
    position: fixed;
    left: 20%;
    border-radius: 50%;
    background: linear-gradient(
      35deg,
      #ccffff,
      #ffcccc
    );
    animation-name: fade;
    animation-duration: 3s;
  }

  @keyframes fade {
    50% {
      left: 60%;

    }
  }

</style>

<div id="ball"></div>

Solution

<style>
  #ball {
    width: 70px;
    height: 70px;
    margin: 50px auto;
    position: fixed;
    left: 20%;
    border-radius: 50%;
    background: linear-gradient(
      35deg,
      #ccffff,
      #ffcccc
    );
    animation-name: fade;
    animation-duration: 3s;
  }

  @keyframes fade {
    50% {
      left: 60%;
      opacity: 0.1;
    }
  }
</style>
<div id="ball"></div>

2.0 KiB Raw Blame History