练习1_时钟.html 3.2 KB

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  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8">
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0">
  6. <title>Document</title>
  7. <style>
  8. *{
  9. margin: 0;
  10. padding: 0;
  11. }
  12. li{
  13. list-style: none;
  14. }
  15. .box{
  16. width: 404px;
  17. height: 404px;
  18. border: 2px dashed black;
  19. position: fixed;
  20. top: 50%;
  21. left: 50%;
  22. transform: translate(-50%,-50%);
  23. }
  24. .clock{
  25. width: 400px;
  26. height: 400px;
  27. border: 2px solid black;
  28. border-radius: 50%;
  29. position: relative;
  30. }
  31. .clock li{
  32. width: 2px;
  33. height: 6px;
  34. background-color: black;
  35. position: absolute;
  36. top: 0;
  37. left: 50%;
  38. /* transform: translateX(-50%); */
  39. margin-left: -1px;
  40. transform-origin: center 200px;
  41. }
  42. /* .clock li:nth-child(1){
  43. transform: rotate(6deg) translateX(-50%);
  44. }
  45. .clock li:nth-child(2){
  46. transform: rotate(12deg) translateX(-50%);;
  47. } */
  48. .clock li:nth-child(5n+1){
  49. height: 12px;
  50. }
  51. .hour,.minute,.seconds{
  52. position: absolute;
  53. left: 50%;
  54. transform: translateX(-50%);
  55. transform-origin: center bottom;
  56. }
  57. .hour{
  58. width: 12px;
  59. height: 120px;
  60. background-color: red;
  61. top: 80px;
  62. }
  63. .minute{
  64. width: 8px;
  65. height: 150px;
  66. background-color: blue;
  67. top: 50px;
  68. }
  69. .seconds{
  70. width: 4px;
  71. height: 180px;
  72. background-color: green;
  73. top: 20px;
  74. /* transform: translateX(-50%) rotate(120deg); */
  75. }
  76. </style>
  77. </head>
  78. <body>
  79. <div class="box">
  80. <div class="clock">
  81. <ul>
  82. <!-- <li></li>
  83. <li></li>
  84. <li></li> -->
  85. </ul>
  86. <div class="hour"></div>
  87. <div class="minute"></div>
  88. <div class="seconds"></div>
  89. </div>
  90. </div>
  91. <script>
  92. var oUl = document.getElementsByTagName("ul")[0];
  93. var str = ""
  94. for(var i=0;i<60;i++){
  95. str += "<li style='transform: rotate("+(i*6)+"deg);'></li>"
  96. }
  97. oUl.innerHTML = str;
  98. var oSeconds = document.getElementsByClassName("seconds")[0];
  99. var oMinute = document.getElementsByClassName("minute")[0];
  100. var oHour = document.getElementsByClassName("hour")[0];
  101. setInterval(function(){
  102. var timer = new Date();
  103. var seconds = timer.getSeconds();
  104. var minute = timer.getMinutes();
  105. var hour = timer.getHours();
  106. console.log(hour);
  107. oSeconds.style.transform = "translateX(-50%) rotate("+ (seconds*6) +"deg)";
  108. oMinute.style.transform = "translateX(-50%) rotate("+ (minute*6) +"deg)";
  109. oHour.style.transform = "translateX(-50%) rotate("+ (hour*30) +"deg)";
  110. },1000);
  111. </script>
  112. </body>
  113. </html>