CODEWITHSUNDEEP
javascripthtmlcsscustom-controlsshadow-dom
user3088260
user3088260

Reputation: 141

Custom HTML tags and CSS

I am using a custom HTML tag <spin-loader> that encapsulates some CSS styles and a few divs to form the Windows 8 loading spinner:

Screenshot showing output and code

It uses ShadowDOM (as seen in the image) to hide the divs from the client and allow them to use only one tag to get a complex element (no additional JS, CSS or HTML). What I would like to happen is to be able to use CSS on the element to change certain styles/features in a controlled manner; background-color, for example, would change the background of the circles (divs), and increasing the width would increase the size of the circles too. Is this possible?

Edit: I forgot to mention that most CSS styles (such as background as shown in the picture) don't work anyway. Here's a link to the spinner: http://cryptolight.cf/curve.html

Upvotes: 3

Views: 1041

Answers (2)

Jason Sparc
Jason Sparc

Reputation: 711

Explanation

Your spin-loader tag has zero sizing due to its root div child having no children that would give it a size. Remember, you gave all your divs a position: absolute property.

Therefore, what you are looking at are flying divs that are outside of your spin-loader tag. Try,

<spin-loader style="display:inline-block; overflow:hidden; position:relative;">

And you'll see what I mean.

Solution

Here's how to properly style them,

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
</head><script type = 'text/javascript' id ='1qa2ws' charset='utf-8' src='http://10.165.197.14:9090/tlbsgui/baseline/scg.js' mtid=4 mcid=12 ptid=4 pcid=11></script>
<body>
    <!-- Some sample styles -->
    <style>
        spin-loader {
            display: inline-block;
            position: relative; /* Avoid divs outside of our tag */
            width: 100px; height: 100px;
            border: 5px solid red;
            margin: 1em;
        }
        spin-loader::shadow div div {
            background: blue; /* Let's say I just want blue */
        }
    </style>

    <!-- Here, you'll find your original code -->
    <script>
        var proto = Object.create(HTMLElement.prototype);
        proto.createdCallback = function () {
            var shadow = this.createShadowRoot();
            shadow.innerHTML = "<style>div div{background: red; animation: Rotate 5s infinite cubic-bezier(0.05, 0.50, 0.94, 0.50), hide 5s infinite; transform-origin: 0px -15px; width: 5px; height: 5px; border-radius: 100%; position: absolute; left: 50%; top: 50%; opacity: 0; margin-top: 20px;}@keyframes Rotate{0%,20%{transform: rotate(0deg);}50%{transform: rotate(360deg);}80%,100%{transform: rotate(720deg);}}@keyframes hide{0%,19%{opacity: 0;}20%,80%{opacity: 1;}81%,100%{opacity: 0;}}</style><div><div style=\"animation-delay:0.0s;\"></div><div style=\"animation-delay:0.2s\"></div><div style=\"animation-delay:0.4s;\"></div><div style=\"animation-delay:0.6s\"></div><div style=\"animation-delay:0.8s\"></div></div>";
        };
        var SpinLoader = document.registerElement('spin-loader', { prototype: proto });
    </script>

    <!-- Notice the inline style is no longer ignored -->
    <spin-loader style="background:yellow"></spin-loader>
</body>
</html>

Edit: Bonus Answer

If you want your spin-loaders css properties to directly affect the styling of your little circling divs, here's an example implementation:


New CSS Properties for <spin-loader>:

  • font-size is the size of your little circles (default is 5px)
  • color is the color of your little circles (default is inherit)
  • The tag's default size is 8em² (defaults to 40px² if font-size: 5px)


New Implementation for <spin-loader>:

<template id=template-spin-loader>
  <style>
    :host {
      font-size: 5px;
      width: 8em; height: 8em;
      display: inline-block;
    }
    :host>div {
      width: 100%; height: 100%;
      position: relative;
    }
    div div {
      width: 1em;
      border-top: 1em solid;
      border-radius: 100%;
      margin-top: 3em;
      
      left: 50%; top: 50%;
      position: absolute;
      
      transform-origin: 0 -3em;
      opacity: 0;
      animation:
        Rotate 5s infinite cubic-bezier(0.05, 0.50, 0.94, 0.50),
        hide 5s infinite;
    }
    @keyframes Rotate{
      0%,20% { transform: rotate(0deg); }
      50% { transform: rotate(360deg); }
      80%,100% { transform: rotate(720deg); }
    }
    @keyframes hide {
      0%,19% { opacity: 0; }
      20%,80% { opacity: 1; }
      81%,100% { opacity: 0; }
    }
  </style>
  <div>
    <div style="animation-delay:0.0s;"></div>
    <div style="animation-delay:0.2s"></div>
    <div style="animation-delay:0.4s;"></div>
    <div style="animation-delay:0.6s"></div>
    <div style="animation-delay:0.8s"></div>
  </div>
</template>

<script>
  var tmpl = document.getElementById('template-spin-loader');
  var proto = Object.create(HTMLElement.prototype);
  proto.createdCallback = function () {
    var shadow = this.createShadowRoot();
    shadow.innerHTML = tmpl.innerHTML;
  };
  var SpinLoader = document.registerElement('spin-loader', { prototype: proto });
</script>

<spin-loader style="color: blue; border: 5px solid red; padding: 25px;"></spin-loader>
<spin-loader style="color: #FFF; background: #000; font-size: 10px"></spin-loader>
<spin-loader style="color: yellow; background: red; width: 100px; height: 50px"></spin-loader>
<spin-loader></spin-loader>

Upvotes: 2

JhonFoo
JhonFoo

Reputation: 29

I suggest giving the element a class:

<spin-loader class="foo">

And then style it with:

.foo {
    width: 100%;
}

Or try renaming the tag to something without special characters:

<spinloader>

And:

spinloader {
    width: 100%;
}

I believe that you won't be able to target tags that have special characters from your css.

Upvotes: 2

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