HTTP redirect page

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="refresh" content="0; URL='https://example.com'" />
</head>
<body>
  </body>
</html>

Avoid blink on webfont load

@font-face {
    font-display:swap;
}

HTML images lazy load

<head>
    <script src="lazysizes.min.js" async></script>
</head>
<body>
    <img data-src="flower.jpg" class="lazyload" alt="">
</body>   


<img src="flower.jpg" lazyload="auto|on|off">


<!-- non-responsive: -->
<img data-src="image.jpg" class="lazyload" />

<!-- responsive example with automatic sizes calculation: -->
<img
    data-sizes="auto"
    data-src="image2.jpg"
    data-srcset="image1.jpg 300w,
    image2.jpg 600w,
    image3.jpg 900w" class="lazyload" />

<!-- iframe example -->
<iframe frameborder="0"
    class="lazyload"
    allowfullscreen=""
    data-src="//www.youtube.com/embed/ZfV-aYdU4uE">
</iframe>

Delete html tag using awk

delete html tag using awk
 
echo '<font>abc 123</font>' | awk -F'.?>' '{print $2}' | awk -F'</' '{ print $(NF-1) }'