功能

  1. 按回车键可往表中新增事件
  2. 可以删除已添加的事件
  3. 可以一键清空表中所有的事件
  4. 有统计事件的总数的功能

    效果图

    image.png

代码

  1. <html>
  3. <head>
  4.   <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
  5.   <title>小X记事本</title>
  6.   <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
  7.   <meta name="robots" content="noindex, nofollow" />
  8.   <meta name="googlebot" content="noindex, nofollow" />
  9.   <meta name="viewport" content="width=device-width, initial-scale=1" />
  10.   <link rel="stylesheet" type="text/css" href="./css/index.css" />
  11. </head>
  13. <body>
  14.   <!-- 主体区域 -->
  15.   <section id="todoapp">
  16.     <!-- 输入框 -->
  17.     <header class="header">
  18.       <h1>小X记事本</h1>
  19.       <input v-model="inputValue" @keyup.enter="add" autofocus="autofocus" autocomplete="off" placeholder="请输入任务"
  20.         class="new-todo" >
  21.     </header>
  22.     <!-- 列表区域 -->
  23.     <section class="main">
  24.       <ul class="todo-list">
  25.         <li class="todo" v-for="(item,index) in list">
  26.           <div class="view">
  27.             <span class="index">{{ index+1 }}.</span>
  28.             <label>{{ item }}</label>
  29.             <button class="destroy" @click="remove(index)"></button>
  30.           </div>
  31.         </li>
  32.       </ul>
  33.     </section>
  34.     <!-- 统计和清空 -->
  35.     <footer class="footer" >
  36.         <!-- 
  37.              这里用v-if和v-show都行，根据表达式的真值切换元素的显示和隐藏。
  38.              v-show：本质是通过操纵dom元素来切换显示状态，当表达式为true时，元素存在于dom树中，当为false时元素从dom树中移除
  39.              v-if:设置display的值来控制元素的显示与隐藏
  40.         -->
  41.       <span class="todo-count" v-if="list.length!=0">
  42.           <!-- 基于数据的开发方式--将标签内的元素用差值表达式换成是数组的长度即可 -->
  43.         <strong>{{ list.length }}</strong> items left
  44.       </span>
  45.       <button class="clear-completed" @click="clear" v-if="list.length!=0">
  46.         Clear
  47.       </button>
  48.     </footer>
  49.   </section>
  51.   <!-- 开发环境版本，包含了有帮助的命令行警告 -->
  52.   <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
  53.   <script>
  54.     var app = new Vue({
  55.       el: "#todoapp",
  56.       data: {
  57.         list: ["写代码", "吃饭饭", "睡觉觉"],
  58.         inputValue: "好好学习,天天向上"
  59.       },
  60.       methods: {
  61.         add: function () {
  62.           this.list.push(this.inputValue);
  63.         },
  64.         remove:function(index) {
  65.         //splice--从index这个位置开始删除1个元素
  66.           this.list.splice(index,1);
  67.         },
  68.         clear:function() {
  69.             //清空即让list数组为空即可
  70.             this.list=[];
  71.         }
  72.       },
  73.     })
  74.   </script>
  75. </body>
  77. </html>
  1. html,
  2. body {
  3.   margin: 0;
  4.   padding: 0;
  5. }
  6. body {
  7.   background: #fff;
  8. }
  9. button {
  10.   margin: 0;
  11.   padding: 0;
  12.   border: 0;
  13.   background: none;
  14.   font-size: 100%;
  15.   vertical-align: baseline;
  16.   font-family: inherit;
  17.   font-weight: inherit;
  18.   color: inherit;
  19.   -webkit-appearance: none;
  20.   appearance: none;
  21.   -webkit-font-smoothing: antialiased;
  22.   -moz-osx-font-smoothing: grayscale;
  23. }
  25. body {
  26.   font: 14px "Helvetica Neue", Helvetica, Arial, sans-serif;
  27.   line-height: 1.4em;
  28.   background: #f5f5f5;
  29.   color: #4d4d4d;
  30.   min-width: 230px;
  31.   max-width: 550px;
  32.   margin: 0 auto;
  33.   -webkit-font-smoothing: antialiased;
  34.   -moz-osx-font-smoothing: grayscale;
  35.   font-weight: 300;
  36. }
  38. :focus {
  39.   outline: 0;
  40. }
  42. .hidden {
  43.   display: none;
  44. }
  46. #todoapp {
  47.   background: #fff;
  48.   margin: 180px 0 40px 0;
  49.   position: relative;
  50.   box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.2), 0 25px 50px 0 rgba(0, 0, 0, 0.1);
  51. }
  53. #todoapp input::-webkit-input-placeholder {
  54.   font-style: italic;
  55.   font-weight: 300;
  56.   color: #e6e6e6;
  57. }
  59. #todoapp input::-moz-placeholder {
  60.   font-style: italic;
  61.   font-weight: 300;
  62.   color: #e6e6e6;
  63. }
  65. #todoapp input::input-placeholder {
  66.   font-style: italic;
  67.   font-weight: 300;
  68.   color: gray;
  69. }
  71. #todoapp h1 {
  72.   position: absolute;
  73.   top: -160px;
  74.   width: 100%;
  75.   font-size: 60px;
  76.   font-weight: 100;
  77.   text-align: center;
  78.   color: rgba(175, 47, 47, .8);
  79.   -webkit-text-rendering: optimizeLegibility;
  80.   -moz-text-rendering: optimizeLegibility;
  81.   text-rendering: optimizeLegibility;
  82. }
  84. .new-todo,
  85. .edit {
  86.   position: relative;
  87.   margin: 0;
  88.   width: 100%;
  89.   font-size: 24px;
  90.   font-family: inherit;
  91.   font-weight: inherit;
  92.   line-height: 1.4em;
  93.   border: 0;
  94.   color: inherit;
  95.   padding: 6px;
  96.   border: 1px solid #999;
  97.   box-shadow: inset 0 -1px 5px 0 rgba(0, 0, 0, 0.2);
  98.   box-sizing: border-box;
  99.   -webkit-font-smoothing: antialiased;
  100.   -moz-osx-font-smoothing: grayscale;
  101. }
  103. .new-todo {
  104.   padding: 16px;
  105.   border: none;
  106.   background: rgba(0, 0, 0, 0.003);
  107.   box-shadow: inset 0 -2px 1px rgba(0, 0, 0, 0.03);
  108. }
  110. .main {
  111.   position: relative;
  112.   z-index: 2;
  113.   border-top: 1px solid #e6e6e6;
  114. }
  116. .toggle-all {
  117.   width: 1px;
  118.   height: 1px;
  119.   border: none; /* Mobile Safari */
  120.   opacity: 0;
  121.   position: absolute;
  122.   right: 100%;
  123.   bottom: 100%;
  124. }
  126. .toggle-all + label {
  127.   width: 60px;
  128.   height: 34px;
  129.   font-size: 0;
  130.   position: absolute;
  131.   top: -52px;
  132.   left: -13px;
  133.   -webkit-transform: rotate(90deg);
  134.   transform: rotate(90deg);
  135. }
  137. .toggle-all + label:before {
  138.   content: "❯";
  139.   font-size: 22px;
  140.   color: #e6e6e6;
  141.   padding: 10px 27px 10px 27px;
  142. }
  144. .toggle-all:checked + label:before {
  145.   color: #737373;
  146. }
  148. .todo-list {
  149.   margin: 0;
  150.   padding: 0;
  151.   list-style: none;
  152.   max-height: 420px;
  153.   overflow: auto;
  154. }
  156. .todo-list li {
  157.   position: relative;
  158.   font-size: 24px;
  159.   border-bottom: 1px solid #ededed;
  160.   height: 60px;
  161.   box-sizing: border-box;
  162. }
  164. .todo-list li:last-child {
  165.   border-bottom: none;
  166. }
  168. .todo-list .view .index {
  169.   position: absolute;
  170.   color: gray;
  171.   left: 10px;
  172.   top: 20px;
  173.   font-size: 16px;
  174. }
  176. .todo-list li .toggle {
  177.   text-align: center;
  178.   width: 40px;
  179.   /* auto, since non-WebKit browsers doesn't support input styling */
  180.   height: auto;
  181.   position: absolute;
  182.   top: 0;
  183.   bottom: 0;
  184.   margin: auto 0;
  185.   border: none; /* Mobile Safari */
  186.   -webkit-appearance: none;
  187.   appearance: none;
  188. }
  190. .todo-list li .toggle {
  191.   opacity: 0;
  192. }
  194. .todo-list li .toggle + label {
  195.   /*
  196.   Firefox requires `#` to be escaped - https://bugzilla.mozilla.org/show_bug.cgi?id=922433
  197.   IE and Edge requires *everything* to be escaped to render, so we do that instead of just the `#` - https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/7157459/
  198.   */
  199.   background-image: url("data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23ededed%22%20stroke-width%3D%223%22/%3E%3C/svg%3E");
  200.   background-repeat: no-repeat;
  201.   background-position: center left;
  202. }
  204. .todo-list li .toggle:checked + label {
  205.   background-image: url("data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23bddad5%22%20stroke-width%3D%223%22/%3E%3Cpath%20fill%3D%22%235dc2af%22%20d%3D%22M72%2025L42%2071%2027%2056l-4%204%2020%2020%2034-52z%22/%3E%3C/svg%3E");
  206. }
  208. .todo-list li label {
  209.   word-break: break-all;
  210.   padding: 15px 15px 15px 60px;
  211.   display: block;
  212.   line-height: 1.2;
  213.   transition: color 0.4s;
  214. }
  216. .todo-list li.completed label {
  217.   color: #d9d9d9;
  218.   text-decoration: line-through;
  219. }
  221. .todo-list li .destroy {
  222.   display: none;
  223.   position: absolute;
  224.   top: 0;
  225.   right: 10px;
  226.   bottom: 0;
  227.   width: 40px;
  228.   height: 40px;
  229.   margin: auto 0;
  230.   font-size: 30px;
  231.   color: #cc9a9a;
  232.   margin-bottom: 11px;
  233.   transition: color 0.2s ease-out;
  234. }
  236. .todo-list li .destroy:hover {
  237.   color: #af5b5e;
  238. }
  240. .todo-list li .destroy:after {
  241.   content: "×";
  242. }
  244. .todo-list li:hover .destroy {
  245.   display: block;
  246. }
  248. .todo-list li .edit {
  249.   display: none;
  250. }
  252. .todo-list li.editing:last-child {
  253.   margin-bottom: -1px;
  254. }
  256. .footer {
  257.   color: #777;
  258.   padding: 10px 15px;
  259.   height: 20px;
  260.   text-align: center;
  261.   border-top: 1px solid #e6e6e6;
  262. }
  264. .footer:before {
  265.   content: "";
  266.   position: absolute;
  267.   right: 0;
  268.   bottom: 0;
  269.   left: 0;
  270.   height: 50px;
  271.   overflow: hidden;
  272.   box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2), 0 8px 0 -3px #f6f6f6,
  273.     0 9px 1px -3px rgba(0, 0, 0, 0.2), 0 16px 0 -6px #f6f6f6,
  274.     0 17px 2px -6px rgba(0, 0, 0, 0.2);
  275. }
  277. .todo-count {
  278.   float: left;
  279.   text-align: left;
  280. }
  282. .todo-count strong {
  283.   font-weight: 300;
  284. }
  286. .filters {
  287.   margin: 0;
  288.   padding: 0;
  289.   list-style: none;
  290.   position: absolute;
  291.   right: 0;
  292.   left: 0;
  293. }
  295. .filters li {
  296.   display: inline;
  297. }
  299. .filters li a {
  300.   color: inherit;
  301.   margin: 3px;
  302.   padding: 3px 7px;
  303.   text-decoration: none;
  304.   border: 1px solid transparent;
  305.   border-radius: 3px;
  306. }
  308. .filters li a:hover {
  309.   border-color: rgba(175, 47, 47, 0.1);
  310. }
  312. .filters li a.selected {
  313.   border-color: rgba(175, 47, 47, 0.2);
  314. }
  316. .clear-completed,
  317. html .clear-completed:active {
  318.   float: right;
  319.   position: relative;
  320.   line-height: 20px;
  321.   text-decoration: none;
  322.   cursor: pointer;
  323. }
  325. .clear-completed:hover {
  326.   text-decoration: underline;
  327. }
  329. .info {
  330.   margin: 50px auto 0;
  331.   color: #bfbfbf;
  332.   font-size: 15px;
  333.   text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
  334.   text-align: center;
  335. }
  337. .info p {
  338.   line-height: 1;
  339. }
  341. .info a {
  342.   color: inherit;
  343.   text-decoration: none;
  344.   font-weight: 400;
  345. }
  347. .info a:hover {
  348.   text-decoration: underline;
  349. }
  351. /*
  352. Hack to remove background from Mobile Safari.
  353. Can't use it globally since it destroys checkboxes in Firefox
  354. */
  355. @media screen and (-webkit-min-device-pixel-ratio: 0) {
  356.   .toggle-all,
  357.   .todo-list li .toggle {
  358.     background: none;
  359.   }
  361.   .todo-list li .toggle {
  362.     height: 40px;
  363.   }
  364. }
  366. @media (max-width: 430px) {
  367.   .footer {
  368.     height: 50px;
  369.   }
  371.   .filters {
  372.     bottom: 10px;
  373.   }
  374. }