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CSS CSS - Beyond the Basics CSS Animation Basics Full-Page Animation Project: Part 2

jsdevtom
jsdevtom
16,963 Points

Why is my background not animating?

as far as I can see, my code is exactly the same:

Here is a CodePen or you can also view the files below. For some reason, the CodePen, which has exactly the same code, animates neither the background nor the steam. Really. Confused.

------ EDIT------- Found what is causing the issue: the

 body {
  -webkit-animation: bg-move 8s easy-out;
}

works only when I remove the vendor prefix. But why??

animation.css

/*  Animations - WebKit only
------------------------------------------ */
.boat {
  -webkit-transform-origin: 50% 50%;
  -webkit-animation: rock-boat 2s linear infinite;

}

.boat::after {
    -webkit-animation: steam 2s linear infinite;
}

body {
  -webkit-animation: bg-move 8s easy-out;
}


/*  Keyframes - WebKit only
------------------------------------------ */


@-webkit-keyframes rock-boat {
  50%  { -webkit-transform: rotate(-5deg) translateY(-10px);}
}

@-webkit-keyframes steam {
  40%,
  60%  { opacity: 1;}
  100% { -webkit-transform: translate(-15%, -35%) rotateZ(20deg); }
}

@-webkit-keyframes bg-move {
  0%   { background-position:  100% -460px; }
  100% { background-position: -350% -460px; }
}

main.css

body {
    background: #F0FCFF url('img/island.png') repeat-x 100% -460px;
    background-size: 780px;
}
.boat {
    width: 380px;
    position: absolute;
    top: 40%;
    left: 35%;
}
.boat img {
    width: 100%;
}
.boat::after {
    content: "";
    display: block;
    width: 120px;
    height: 120px;
    background: url('img/steam.png') no-repeat;
    background-size: 120px;
    position: absolute;
    top: -25%;
    left: 5%;
    opacity: 0;
}
.mike {
    width: 180px;
    position: absolute;
    top: 55%;
    left: -15%;
    -webkit-transform: rotateZ(-5deg);
    -moz-transform: rotateZ(-5deg);
    -ms-transform: rotateZ(-5deg);
    transform: rotateZ(-5deg);
}

index.html

<!DOCTYPE html> <html> <head> <title>Tugboat Animation</title> <link rel="stylesheet" href="main.css"> <link rel="stylesheet" href="animation.css"> </head> <body> <div class="boat"> <img src="img/boat.png" alt="tugboat"> </div> <img class="mike" src="img/mike.png"> </body> </html>

1 Answer

Steven Parker
Steven Parker
230,248 Points

It depends on what browser you are using, and sometimes what version. I notice the comment in the CSS file you included above does say WebKit only.

It's been a while since I took this course myself, but I believe elsewhere in the videos there is a discussion about how the names for animation properties differ between browsers. I know most real-life code that uses these features will have multiple lines for each property, each using a different browser's name for the property. That way, the code will work in all browser varieties.

But for expedience, I guess some portion of the videos only show the example in the style appropriate the the instructor's browser.