{"rowid": 329, "title": "Broader Border Corners", "contents": "A note from the editors:  Since this article was written the CSS border-radius property has become widely supported in browsers. It should be preferred to this image technique.\n                \n                \n                      \n                A quick and easy recipe for turning those single-pixel borders that the kids love so much into  into something a little less right-angled.\n\nHere\u2019s the principle: We have a box with a one-pixel wide border around it. Inside that box is another box that has a little rounded-corner background image sitting snugly in one of its corners. The inner-box is then nudged out a bit so that it\u2019s actually sitting on top of the outer box. If it\u2019s all done properly, that little background image can mask the hard right angle of the default border of the outer-box, giving the impression that it actually has a rounded corner.\n\nTake An Image, Finely Chopped\n\n\n\nAdd A Sprinkle of Markup\n\n<div id=\"content\">\n    <p>Lorem ipsum etc. etc. etc.</p>\n</div>\n\nThrow In A Dollop of CSS\n\n#content { \n     border: 1px solid #c03;\n}\n\n#content p {\n     background: url(corner.gif) top left no-repeat;\n     position: relative;\n     left: -1px;\n     top: -1px;\n     padding: 1em;\n     margin: 0;\n}\n\nBubblin\u2019 Hot\n\n\n\tThe content div has a one-pixel wide red border around it.\n\tThe paragraph is given a single instance of the background image, created to look like a one-pixel wide arc.\n\tThe paragraph is shunted outside of the box \u2013 back one pixel and up one pixel \u2013 so that it is sitting over the div\u2019s border. The white area of the image covers up that part of the border\u2019s corner, and the arc meets up with the top and left border.\n\tBecause, in this example, we\u2019re applying a background image to a paragraph, its top margin needs to be zeroed so that it starts at the top of its container.\n\n\nEt voil\u00e0. Bon app\u00e9tit.\n\nExtra Toppings\n\n\n\tIf you want to apply a curve to each one of the corners and you run out of meaningful markup to hook the background images on to, throw some spans or divs in the mix (there\u2019s nothing wrong with this if that\u2019s the effect you truly want \u2013 they don\u2019t hurt anybody) or use some nifty DOM Scripting to put the scaffolding in for you.\n\tNote that if you\u2019ve got more than one of these relative corners, you will need to compensate for the starting position of each box which is nested in an already nudged parent.\n\tYou\u2019re not limited to one pixel wide, rounded corners \u2013 the same principles apply to thicker borders, or corners with different shapes.", "year": "2005", "author": "Patrick Griffiths", "author_slug": "patrickgriffiths", "published": "2005-12-14T00:00:00+00:00", "url": "https://24ways.org/2005/broader-border-corners/", "topic": "design"}