1.基础三角形.
1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>全局css以及辅助css</title> 6 <style type="text/css"> 7 8 9 10 /***1: 初始样式设置*******/ 11 html, body, ul, li, ol, dl, dd, dt, p, h1, h2, h3, h4, h5, h6, form, fieldset, legend, img, div,span, table,th,tr,td,button { margin:0; padding:0; } 12 13 14 15 16 /*******2: 清除浮动******/ 17 18 /*IE6, IE7 生效*/ 19 .floatfix{ 20 *zoom:1; 21 } 22 23 /*其他浏览器*/ 24 .floatfix:after{ 25 content:""; 26 display:table; 27 clear:both; 28 } 29 30 /***3: 超出长度显示省略号. 还需要设置width**/ 31 32 .ellipsis { 33 text-overflow: ellipsis; 34 overflow: hidden; 35 white-space: nowrap; 36 } 37 38 39 .all { 40 width: 80%; 41 margin: 30px auto; 42 } 43 44 .row { 45 border: 1px solid black; 46 margin: 10px; 47 padding: 10px; 48 } 49 50 p { 51 color: red; 52 } 53 54 55 /*****4: 三角****************/ 56 57 .triangle { 58 width: 0; 59 height: 0; 60 border-top: 20px solid #EEB422; 61 border-right: 20px solid #C0FF3E; 62 border-bottom: 20px solid #A020F0; 63 border-left: 20px solid #7CFC00; 64 } 65 66 .triangle-up4 { 67 width: 0; 68 height: 0; 69 border-top: 20px solid transparent; 70 border-right: 20px solid transparent; 71 border-bottom: 20px solid #A020F0; 72 border-left: 20px solid transparent; 73 } 74 75 .triangle-down4 { 76 width: 0; 77 height: 0; 78 border-top: 20px solid #EEB422; 79 border-right: 20px solid transparent; 80 border-bottom: 20px solid transparent; 81 border-left: 20px solid transparent; 82 } 83 84 .triangle-left4 { 85 width: 0; 86 height: 0; 87 border-top: 20px solid transparent; 88 border-right: 20px solid #C0FF3E; 89 border-bottom: 20px solid transparent; 90 border-left: 20px solid transparent; 91 } 92 93 .triangle-right4 { 94 width: 0; 95 height: 0; 96 border-top: 20px solid transparent; 97 border-right: 20px solid transparent; 98 border-bottom: 20px solid transparent; 99 border-left: 20px solid #7CFC00; 100 } 101 102 103 104 .triangle-up { 105 width: 0; 106 height: 0; 107 border-right: 20px solid transparent; 108 border-bottom: 40px solid #A020F0; 109 border-left: 20px solid transparent; 110 } 111 112 .triangle-down { 113 width: 0; 114 height: 0; 115 border-top: 40px solid #EEB422; 116 border-right: 20px solid transparent; 117 border-left: 20px solid transparent; 118 } 119 120 .triangle-left { 121 width: 0; 122 height: 0; 123 border-top: 20px solid transparent; 124 border-bottom: 20px solid transparent; 125 border-left: 40px solid #7CFC00; 126 } 127 128 .triangle-right { 129 width: 0; 130 height: 0; 131 border-top: 20px solid transparent; 132 border-bottom: 20px solid transparent; 133 border-right: 40px solid #C0FF3E; 134 } 135 136 .triangle-left-bottom { 137 width: 0; 138 height: 0; 139 border-top: 40px solid transparent; 140 border-left: 40px solid #7CFC00; 141 } 142 143 .triangle-right-bottom { 144 width: 0; 145 height: 0; 146 border-top: 40px solid transparent; 147 border-right: 40px solid #C0FF3E; 148 } 149 150 .triangle-left-up { 151 width: 0; 152 height: 0; 153 border-bottom: 40px solid transparent; 154 border-left: 40px solid #7CFC00; 155 } 156 157 .triangle-right-up { 158 width: 0; 159 height: 0; 160 border-bottom: 40px solid transparent; 161 border-right: 40px solid #C0FF3E; 162 } 163 164 165 </style> 166 167 <!-- 引入js文件 --> 168 <script type="text/javascript" src="jquery-1.8.3.min.js"></script> 169 170 </head> 171 <body> 172 173 174 <div class="all"> 175 176 <hr> 177 <p>使用border的4个方向</p> 178 <div class="row"> 179 <span>四个三角</span> 180 <div class="triangle"> 181 </div> 182 </div> 183 184 <div class="row"> 185 <span>四个三角-上</span> 186 <div class="triangle-up4"> 187 </div> 188 </div> 189 190 <div class="row"> 191 <span>四个三角-下</span> 192 <div class="triangle-down4"> 193 </div> 194 </div> 195 196 <div class="row"> 197 <span>四个三角-左</span> 198 <div class="triangle-left4"> 199 </div> 200 </div> 201 202 <div class="row"> 203 <span>四个三角-右</span> 204 <div class="triangle-right4"> 205 </div> 206 </div> 207 208 <hr> 209 <p>使用border的3个方向</p> 210 <div class="row"> 211 <span>上三角</span> 212 <div class="triangle-up"> 213 </div> 214 </div> 215 <div class="row"> 216 <span>下三角</span> 217 <div class="triangle-down"> 218 </div> 219 </div> 220 <div class="row"> 221 <span>左三角</span> 222 <div class="triangle-left"> 223 </div> 224 </div> 225 <div class="row"> 226 <span>右三角</span> 227 <div class="triangle-right"> 228 </div> 229 </div> 230 231 <hr> 232 <p>使用border的2个方向</p> 233 <div class="row"> 234 <span>左下角</span> 235 <div class="triangle-left-bottom"> 236 </div> 237 </div> 238 <div class="row"> 239 <span>右下角</span> 240 <div class="triangle-right-bottom"> 241 </div> 242 </div> 243 244 <div class="row"> 245 <span>左上角</span> 246 <div class="triangle-left-up"> 247 </div> 248 </div> 249 <div class="row"> 250 <span>右上角</span> 251 <div class="triangle-right-up"> 252 </div> 253 </div> 254 255 256 257 </div> 258 259 260 261 262 </body> 263 </html>
显示:
注意:
1)border 可以设置四个, 出现的就是 四个三角 , 四个三角-上, 四个上角-下, 四个三角-左 , 四个三角-右
2) border 可以设置三个, 出现的是 上三角, 下三角, 左三角, 右三角
4)border 可以设置 两个, 出现的是 左下角, 右下角 , 左上角, 右上角
这是因为?
