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   1  (customElements => {
   2    'strict';
   3    /**
   4     * Creates a custom element with the default spinner of the Joomla logo
   5     */
   6  
   7    class JoomlaCoreLoader extends HTMLElement {
   8      constructor() {
   9        super();
  10        const template = document.createElement('template');
  11        template.innerHTML = `<style>:host{align-items:center;display:flex;height:100%;left:0;opacity:.8;overflow:hidden;position:fixed;top:0;width:100%;z-index:10000}.box{height:345px;margin:0 auto;position:relative;width:345px}.box p{color:#999;float:right;font:normal 1.25em/1em sans-serif;margin:95px 0 0}.box>span{-webkit-animation:jspinner 2s ease-in-out infinite;animation:jspinner 2s ease-in-out infinite}.box .red{-webkit-animation-delay:-1.5s;animation-delay:-1.5s}.box .blue{-webkit-animation-delay:-1s;animation-delay:-1s}.box .green{-webkit-animation-delay:-.5s;animation-delay:-.5s}.yellow{background:#f9a541;border-radius:90px;height:90px;width:90px}.yellow,.yellow:after,.yellow:before{content:"";left:0;position:absolute;top:0}.yellow:after,.yellow:before{background:transparent;border:50px solid #f9a541;box-sizing:content-box;width:50px}.yellow:before{border-radius:75px 75px 0 0;border-width:50px 50px 0;height:35px;margin:60px 0 0 -30px}.yellow:after{border-width:0 0 0 50px;height:105px;margin:140px 0 0 -30px}.red{background:#f44321;border-radius:90px;height:90px;width:90px}.red,.red:after,.red:before{content:"";left:0;position:absolute;top:0}.red:after,.red:before{background:transparent;border:50px solid #f44321;box-sizing:content-box;width:50px}.red:before{border-radius:75px 75px 0 0;border-width:50px 50px 0;height:35px;margin:60px 0 0 -30px}.red:after{border-width:0 0 0 50px;height:105px;margin:140px 0 0 -30px}.blue{background:#5091cd;border-radius:90px;height:90px;width:90px}.blue,.blue:after,.blue:before{content:"";left:0;position:absolute;top:0}.blue:after,.blue:before{background:transparent;border:50px solid #5091cd;box-sizing:content-box;width:50px}.blue:before{border-radius:75px 75px 0 0;border-width:50px 50px 0;height:35px;margin:60px 0 0 -30px}.blue:after{border-width:0 0 0 50px;height:105px;margin:140px 0 0 -30px}.green{background:#7ac143;border-radius:90px;height:90px;width:90px}.green,.green:after,.green:before{content:"";left:0;position:absolute;top:0}.green:after,.green:before{background:transparent;border:50px solid #7ac143;box-sizing:content-box;width:50px}.green:before{border-radius:75px 75px 0 0;border-width:50px 50px 0;height:35px;margin:60px 0 0 -30px}.green:after{border-width:0 0 0 50px;height:105px;margin:140px 0 0 -30px}.yellow{margin:0 0 0 255px;-webkit-transform:rotate(45deg);transform:rotate(45deg)}.red{margin:255px 0 0 255px;-webkit-transform:rotate(135deg);transform:rotate(135deg)}.blue{margin:255px 0 0;-webkit-transform:rotate(225deg);transform:rotate(225deg)}.green{-webkit-transform:rotate(315deg);transform:rotate(315deg)}@-webkit-keyframes jspinner{0%,40%,to{opacity:.3}20%{opacity:1}}@keyframes jspinner{0%,40%,to{opacity:.3}20%{opacity:1}}@media (prefers-reduced-motion:reduce){.box>span{-webkit-animation:none;animation:none}}</style>
  12  <div>
  13      <span class="yellow"></span>
  14      <span class="red"></span>
  15      <span class="blue"></span>
  16      <span class="green"></span>
  17      <p>&trade;</p>
  18  </div>`; // Patch the shadow DOM
  19  
  20        if (window.ShadyCSS) {
  21          window.ShadyCSS.prepareTemplate(template, 'joomla-core-loader');
  22        }
  23  
  24        this.attachShadow({
  25          mode: 'open'
  26        });
  27        this.shadowRoot.appendChild(template.content.cloneNode(true)); // Patch the shadow DOM
  28  
  29        if (window.ShadyCSS) {
  30          window.ShadyCSS.styleElement(this);
  31        }
  32      }
  33  
  34      connectedCallback() {
  35        this.style.backgroundColor = this.color;
  36        this.style.opacity = 0.8;
  37        this.shadowRoot.querySelector('div').classList.add('box');
  38      }
  39  
  40      static get observedAttributes() {
  41        return ['color'];
  42      }
  43  
  44      get color() {
  45        return this.getAttribute('color') || '#fff';
  46      }
  47  
  48      set color(value) {
  49        this.setAttribute('color', value);
  50      }
  51  
  52      attributeChangedCallback(attr, oldValue, newValue) {
  53        switch (attr) {
  54          case 'color':
  55            if (newValue && newValue !== oldValue) {
  56              this.style.backgroundColor = this.color;
  57            }
  58  
  59            break;
  60  
  61        }
  62      }
  63  
  64    }
  65  
  66    if (!customElements.get('joomla-core-loader')) {
  67      customElements.define('joomla-core-loader', JoomlaCoreLoader);
  68    }
  69  })(customElements);