CSS can generate various shapes. Squares and rectangles are easy because they are the natural shapes of the web. Add the width and height and you get the exact size rectangle you want. Add a border radius and you can turn this shape into a circle, and with enough border radius you can turn these rectangles into circles and ovals.
Recommended tutorial: CSS video tutorial
We can also use ::before
and ::after# in CSS pseudo-elements ##, this gives us the possibility to add two more shapes to the original element. By cleverly using positioning, transitions, and many other tricks, we can create many shapes in CSS with just one HTML element.
#square { width: 100px; height: 100px; background: red; }
#rectangle { width: 200px; height: 100px; background: red; }
#circle { width: 100px; height: 100px; background: red; border-radius: 50% }
#oval { width: 200px; height: 100px; background: red; border-radius: 100px / 50px; }
#triangle-up { width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-bottom: 100px solid red; }
#triangle-down { width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-top: 100px solid red; }
#triangle-left { width: 0; height: 0; border-top: 50px solid transparent; border-right: 100px solid red; border-bottom: 50px solid transparent; }
#triangle-right { width: 0; height: 0; border-top: 50px solid transparent; border-left: 100px solid red; border-bottom: 50px solid transparent; }
#triangle-topleft { width: 0; height: 0; border-top: 100px solid red; border-right: 100px solid transparent; }
#triangle-topright { width: 0; height: 0; border-top: 100px solid red; border-left: 100px solid transparent; }
#triangle-bottomleft { width: 0; height: 0; border-bottom: 100px solid red; border-right: 100px solid transparent; }
#triangle-bottomright { width: 0; height: 0; border-bottom: 100px solid red; border-left: 100px solid transparent; }
#curvedarrow { position: relative; width: 0; height: 0; border-top: 9px solid transparent; border-right: 9px solid red; transform: rotate(10deg); } #curvedarrow:after { content: ""; position: absolute; border: 0 solid transparent; border-top: 3px solid red; border-radius: 20px 0 0 0; top: -12px; left: -9px; width: 12px; height: 12px; transform: rotate(45deg); }
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#trapezoid { border-bottom: 100px solid red; border-left: 25px solid transparent; border-right: 25px solid transparent; height: 0; width: 100px; }
#parallelogram { width: 150px; height: 100px; transform: skew(20deg); background: red; }
#star-six { width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-bottom: 100px solid red; position: relative; } #star-six:after { width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-top: 100px solid red; position: absolute; content: ""; top: 30px; left: -50px; }
#star-five { margin: 50px 0; position: relative; display: block; color: red; width: 0px; height: 0px; border-right: 100px solid transparent; border-bottom: 70px solid red; border-left: 100px solid transparent; transform: rotate(35deg); } #star-five:before { border-bottom: 80px solid red; border-left: 30px solid transparent; border-right: 30px solid transparent; position: absolute; height: 0; width: 0; top: -45px; left: -65px; display: block; content: ''; transform: rotate(-35deg); } #star-five:after { position: absolute; display: block; color: red; top: 3px; left: -105px; width: 0px; height: 0px; border-right: 100px solid transparent; border-bottom: 70px solid red; border-left: 100px solid transparent; transform: rotate(-70deg); content: ''; }
#pentagon { position: relative; width: 54px; box-sizing: content-box; border-width: 50px 18px 0; border-style: solid; border-color: red transparent; } #pentagon:before { content: ""; position: absolute; height: 0; width: 0; top: -85px; left: -18px; border-width: 0 45px 35px; border-style: solid; border-color: transparent transparent red; }
#hexagon { width: 100px; height: 55px; background: red; position: relative; } #hexagon:before { content: ""; position: absolute; top: -25px; left: 0; width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-bottom: 25px solid red; } #hexagon:after { content: ""; position: absolute; bottom: -25px; left: 0; width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-top: 25px solid red; }
#octagon { width: 100px; height: 100px; background: red; position: relative; } #octagon:before { content: ""; width: 100px; height: 0; position: absolute; top: 0; left: 0; border-bottom: 29px solid red; border-left: 29px solid #eee; border-right: 29px solid #eee; } #octagon:after { content: ""; width: 100px; height: 0; position: absolute; bottom: 0; left: 0; border-top: 29px solid red; border-left: 29px solid #eee; border-right: 29px solid #eee; }
#heart { position: relative; width: 100px; height: 90px; } #heart:before, #heart:after { position: absolute; content: ""; left: 50px; top: 0; width: 50px; height: 80px; background: red; border-radius: 50px 50px 0 0; transform: rotate(-45deg); transform-origin: 0 100%; } #heart:after { left: 0; transform: rotate(45deg); transform-origin: 100% 100%; }
#infinity { position: relative; width: 212px; height: 100px; box-sizing: content-box; } #infinity:before, #infinity:after { content: ""; box-sizing: content-box; position: absolute; top: 0; left: 0; width: 60px; height: 60px; border: 20px solid red; border-radius: 50px 50px 0 50px; transform: rotate(-45deg); } #infinity:after { left: auto; right: 0; border-radius: 50px 50px 50px 0; transform: rotate(45deg); }
#diamond { width: 0; height: 0; border: 50px solid transparent; border-bottom-color: red; position: relative; top: -50px; } #diamond:after { content: ''; position: absolute; left: -50px; top: 50px; width: 0; height: 0; border: 50px solid transparent; border-top-color: red; }
#diamond-shield { width: 0; height: 0; border: 50px solid transparent; border-bottom: 20px solid red; position: relative; top: -50px; } #diamond-shield:after { content: ''; position: absolute; left: -50px; top: 20px; width: 0; height: 0; border: 50px solid transparent; border-top: 70px solid red; }
#diamond-narrow { width: 0; height: 0; border: 50px solid transparent; border-bottom: 70px solid red; position: relative; top: -50px; } #diamond-narrow:after { content: ''; position: absolute; left: -50px; top: 70px; width: 0; height: 0; border: 50px solid transparent; border-top: 70px solid red; }
#cut-diamond { border-style: solid; border-color: transparent transparent red transparent; border-width: 0 25px 25px 25px; height: 0; width: 50px; box-sizing: content-box; position: relative; margin: 20px 0 50px 0; } #cut-diamond:after { content: ""; position: absolute; top: 25px; left: -25px; width: 0; height: 0; border-style: solid; border-color: red transparent transparent transparent; border-width: 70px 50px 0 50px; }
#egg { display: block; width: 126px; height: 180px; background-color: red; border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%; }
#pacman { width: 0px; height: 0px; border-right: 60px solid transparent; border-top: 60px solid red; border-left: 60px solid red; border-bottom: 60px solid red; border-top-left-radius: 60px; border-top-right-radius: 60px; border-bottom-left-radius: 60px; border-bottom-right-radius: 60px; }
#talkbubble { width: 120px; height: 80px; background: red; position: relative; -moz-border-radius: 10px; -webkit-border-radius: 10px; border-radius: 10px; } #talkbubble:before { content: ""; position: absolute; right: 100%; top: 26px; width: 0; height: 0; border-top: 13px solid transparent; border-right: 26px solid red; border-bottom: 13px solid transparent; }
#burst-12 { background: red; width: 80px; height: 80px; position: relative; text-align: center; } #burst-12:before, #burst-12:after { content: ""; position: absolute; top: 0; left: 0; height: 80px; width: 80px; background: red; } #burst-12:before { transform: rotate(30deg); } #burst-12:after { transform: rotate(60deg); }
#burst-8 { background: red; width: 80px; height: 80px; position: relative; text-align: center; transform: rotate(20deg); } #burst-8:before { content: ""; position: absolute; top: 0; left: 0; height: 80px; width: 80px; background: red; transform: rotate(135deg); }
#yin-yang { width: 96px; box-sizing: content-box; height: 48px; background: #eee; border-color: red; border-style: solid; border-width: 2px 2px 50px 2px; border-radius: 100%; position: relative; } #yin-yang:before { content: ""; position: absolute; top: 50%; left: 0; background: #eee; border: 18px solid red; border-radius: 100%; width: 12px; height: 12px; box-sizing: content-box; } #yin-yang:after { content: ""; position: absolute; top: 50%; left: 50%; background: red; border: 18px solid #eee; border-radius: 100%; width: 12px; height: 12px; box-sizing: content-box; }
#badge-ribbon { position: relative; background: red; height: 100px; width: 100px; border-radius: 50px; } #badge-ribbon:before, #badge-ribbon:after { content: ''; position: absolute; border-bottom: 70px solid red; border-left: 40px solid transparent; border-right: 40px solid transparent; top: 70px; left: -10px; transform: rotate(-140deg); } #badge-ribbon:after { left: auto; right: -10px; transform: rotate(140deg); }
#space-invader { box-shadow: 0 0 0 1em red, 0 1em 0 1em red, -2.5em 1.5em 0 .5em red, 2.5em 1.5em 0 .5em red, -3em -3em 0 0 red, 3em -3em 0 0 red, -2em -2em 0 0 red, 2em -2em 0 0 red, -3em -1em 0 0 red, -2em -1em 0 0 red, 2em -1em 0 0 red, 3em -1em 0 0 red, -4em 0 0 0 red, -3em 0 0 0 red, 3em 0 0 0 red, 4em 0 0 0 red, -5em 1em 0 0 red, -4em 1em 0 0 red, 4em 1em 0 0 red, 5em 1em 0 0 red, -5em 2em 0 0 red, 5em 2em 0 0 red, -5em 3em 0 0 red, -3em 3em 0 0 red, 3em 3em 0 0 red, 5em 3em 0 0 red, -2em 4em 0 0 red, -1em 4em 0 0 red, 1em 4em 0 0 red, 2em 4em 0 0 red; background: red; width: 1em; height: 1em; overflow: hidden; margin: 50px 0 70px 65px; }
#tv { position: relative; width: 200px; height: 150px; margin: 20px 0; background: red; border-radius: 50% / 10%; color: white; text-align: center; text-indent: .1em; } #tv:before { content: ''; position: absolute; top: 10%; bottom: 10%; right: -5%; left: -5%; background: inherit; border-radius: 5% / 50%; }
#chevron { position: relative; text-align: center; padding: 12px; margin-bottom: 6px; height: 60px; width: 200px; } #chevron:before { content: ''; position: absolute; top: 0; left: 0; height: 100%; width: 51%; background: red; transform: skew(0deg, 6deg); } #chevron:after { content: ''; position: absolute; top: 0; right: 0; height: 100%; width: 50%; background: red; transform: skew(0deg, -6deg); }
#magnifying-glass { font-size: 10em; display: inline-block; width: 0.4em; box-sizing: content-box; height: 0.4em; border: 0.1em solid red; position: relative; border-radius: 0.35em; } #magnifying-glass:before { content: ""; display: inline-block; position: absolute; right: -0.25em; bottom: -0.1em; border-width: 0; background: red; width: 0.35em; height: 0.08em; transform: rotate(45deg); }
#facebook-icon { background: red; text-indent: -999em; width: 100px; height: 110px; box-sizing: content-box; border-radius: 5px; position: relative; overflow: hidden; border: 15px solid red; border-bottom: 0; } #facebook-icon:before { content: "/20"; position: absolute; background: red; width: 40px; height: 90px; bottom: -30px; right: -37px; border: 20px solid #eee; border-radius: 25px; box-sizing: content-box; } #facebook-icon:after { content: "/20"; position: absolute; width: 55px; top: 50px; height: 20px; background: #eee; right: 5px; box-sizing: content-box; }
#moon { width: 80px; height: 80px; border-radius: 50%; box-shadow: 15px 15px 0 0 red; }
#flag { width: 110px; height: 56px; box-sizing: content-box; padding-top: 15px; position: relative; background: red; color: white; font-size: 11px; letter-spacing: 0.2em; text-align: center; text-transform: uppercase; } #flag:after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 0; border-bottom: 13px solid #eee; border-left: 55px solid transparent; border-right: 55px solid transparent; }
#cone { width: 0; height: 0; border-left: 70px solid transparent; border-right: 70px solid transparent; border-top: 100px solid red; border-radius: 50%; }
#cross { background: red; height: 100px; position: relative; width: 20px; } #cross:after { background: red; content: ""; height: 20px; left: -40px; position: absolute; top: 40px; width: 100px; }
#base { background: red; display: inline-block; height: 55px; margin-left: 20px; margin-top: 55px; position: relative; width: 100px; } #base:before { border-bottom: 35px solid red; border-left: 50px solid transparent; border-right: 50px solid transparent; content: ""; height: 0; left: 0; position: absolute; top: -35px; width: 0; }
#pointer { width: 200px; height: 40px; position: relative; background: red; } #pointer:after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 0; border-left: 20px solid white; border-top: 20px solid transparent; border-bottom: 20px solid transparent; } #pointer:before { content: ""; position: absolute; right: -20px; bottom: 0; width: 0; height: 0; border-left: 20px solid red; border-top: 20px solid transparent; border-bottom: 20px solid transparent; }
#lock { font-size: 8px; position: relative; width: 18em; height: 13em; border-radius: 2em; top: 10em; box-sizing: border-box; border: 3.5em solid red; border-right-width: 7.5em; border-left-width: 7.5em; margin: 0 0 6rem 0; } #lock:before { content: ""; box-sizing: border-box; position: absolute; border: 2.5em solid red; width: 14em; height: 12em; left: 50%; margin-left: -7em; top: -12em; border-top-left-radius: 7em; border-top-right-radius: 7em; } #lock:after { content: ""; box-sizing: border-box; position: absolute; border: 1em solid red; width: 5em; height: 8em; border-radius: 2.5em; left: 50%; top: -1em; margin-left: -2.5em; }
英文原文地址:https://css-tricks.com/the-shapes-of-css/
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The above is the detailed content of 45 shapes generated using CSS (worth collecting). For more information, please follow other related articles on the PHP Chinese website!