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readme.md

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  • CSS Variables:
    • Declaration: --varName: value;
      /* GLOBAL variables (because of :root) */
  :root { /* <-- refers to the HTML doc */
     --spacing: 10px; /* variable declaration and assignment */
    --blur: 10px; /* You HAVE to assign it a value */
  }
    • Usage: var(--varName);
      img {
      background: var(--base);
      padding: var(--spacing);
      filter: blur(var(--blur));
      }
  • The difference between a NodeList and an Array object ? The methods available.
  • Short-circuit evaluation:
    const suffix = this.dataset.sizing || ' ';
    // The first non-falsy value is returned. 
    // If all values are falsy, the last one is returned.
  • Document.documentElement returns the <html> element. Note
    document.documentElement;