you want to use Ajax, check first that the browser supports the object you’re about to use to enable that Ajax functionality. If you want to use the geolocation <abbr>API</abbr>, check first that the browser supports it.</p>

<p>A team of web developers working on the <abbr>BBC</abbr> news website referred to this kind of feature detection as cutting the mustard. Browsers that cut the mustard get an enhanced experience. Browsers that don’t cut the mustard still get access to the content, but without th