CSS

CSS

• BEM Method

  .css

  /* Block component */
  .btn {}
  /* Element that depends upon the block */
  .btn__price {}
  /* Modifier that changes the style of the block */
  .btn--orange {}
  .btn--big {}
  

• Dark Mode Setting

  .css

  :root {
    color-scheme: light dark; /* both supported */
  }
  

• Image Dark

  • Apply the filter directly on the body tag.

    .css

    body.dark-theme img {
      filter: brightness(.8) contrast(1.2);
    }
    

  • Or apply it via media query.

    .css

    @media (prefers-color-scheme: dark) {
      img {
        filter: brightness(.8) contrast(1.2);
      }
    }
    

• Image prefer Dark

  .html

  <picture>
    <!-- Use this image if the user's OS setting is light or unset -->
    <source srcset="photo-light.png" media="(prefers-color-scheme: light) or (prefers-color-scheme: no-preference)">
    <!-- Use this image if the user's OS setting is dark -->
    <source srcset="photo-dark.png" media="(prefers-color-scheme: dark)">
  </picture>
  

• Non-standard attributes, dataset

  .css

  <style>
    /* styles rely on the custom attribute "order-state" */
    .order[order-state="new"] {
      color: green;
    }
  
    .order[order-state="pending"] {
      color: blue;
    }
  
    .order[order-state="canceled"] {
      color: red;
    }
  </style>
  
  <div class="order" order-state="new">
    A new order.
  </div>
  
  <div class="order" order-state="pending">
    A pending order.
  </div>
  
  <div class="order" order-state="canceled">
    A canceled order.
  </div>