Remove "no-js" class from html tag, add "js" class

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Add the "no-js" class to your topmost html element, so you can use CSS to style JavaScript-free pages. This snippet will then replace that tag with "js", allowing you to style pages with JavaScript.

The excellent [HTML5 Boilerplate]( puts `no-js` in the `` element and then uses [Modernizr]( to replace it with `js`. If you don't want to use all of that stuff, this snippet does the same thing.

Copy this code and paste it in your HTML
  1. <html class="no-js">
  4. document.documentElement.className = document.documentElement.className.replace(/\bno-js\b/g, '') + ' js ';
  5. </script>
  7. <!-- ... -->

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