What is the best way to check a browser's CSS3 compatibility using JavaScript and conditional comments?

It's no secret that my website looks pretty terrible on Internet Explorer versions 7 and 6. I have to face the facts.

When it comes to targeting IE with conditional comments, you can use something like <!-- IF (IE) -->.

But here's the thing - what if a visitor lands on my site using a different browser like Firefox 4 (which is still popular at my school)? How do I detect that?

My goal is to determine if the browser supports border-radius, and if not, load basic styles instead of advanced ones. So, how can I achieve this using JavaScript or conditional comments?

Any advice would be greatly appreciated!

javascriptjqueryhtmlcss

Answer №1

Consider utilizing Modernizr to check for various features, including border-radius and many others (source).

Alternatively, you can specifically test for border-radius with the following code snippet (courtesy of kangax):

var hasBorderRadius = (function (){
  var docEl = document.documentElement, s;
  if (docEl && (s = docEl.style)) {
    return (typeof s.borderRadius == 'string'
      || typeof s.MozBorderRadius == 'string'
      || typeof s.WebkitBorderRadius == 'string'
      || typeof s.KhtmlBorderRadius == 'string');
  }
  return false;
})();

The hasBorderRadius variable will be set to true if supported, otherwise it will be false.

This approach can also be applied to check for other CSS3 properties and HTML elements like placeholder on input elements - refer to the provided link for more details. However, for multiple checks, it's recommended to use a specialized tool rather than creating individual tests.

Answer №2

Focus on the functionality rather than browser compatibility. Utilize Modernizr to detect and test for specific features, which will dynamically add classes to the HTML element. These classes can then be used in your CSS styling to tailor your website design accordingly.

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