Vue入门实战-TODO记事本

绝地灬酷狼 2022-10-28 14:22 240阅读 0赞

## 效果图 ##

![在这里插入图片描述][20210206164153207.gif]

## 实现代码 ##

<html>
      <head>
        <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
        <title>记事本</title>
        <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
        <meta name="robots" content="noindex, nofollow" />
        <meta name="googlebot" content="noindex, nofollow" />
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <link rel="stylesheet" type="text/css" href="./css/index.css" />
      </head>
    
      <body>
        
        <section id="todoapp">
          
          <header class="header">
            <h1>记事本</h1>
            <input v-model="inputVal" autofocus="autofocus" autocomplete="off" placeholder="请输入任务，按回车添加" class="new-todo" @keyup.enter="add" />
          </header>
          
          <section class="main">
            <ul class="todo-list">
              <li class="todo" v-for="(item,index) in todoList">
                <div class="view">
                  <span class="index">{
       {index+1}}.</span> <label>{
       {item}}</label>
                  <button class="destroy" @click="destroy(index)"></button>
                </div>
              </li>
            </ul>
          </section>
          
          <footer class="footer" v-show="todoList.length>0">
            <span class="todo-count">
              <strong>{
       {todoList.length}}</strong> items left
            </span>
            <button class="clear-completed" @click="clear">Clear</button>
          </footer>
        </section>
        
    
        
        <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
        <script> var vm = new Vue({ el: "#todoapp", data: { // 输入框 inputVal: "", // 记事本数据源 todoList: ["学习Java", "学习Vue"], }, methods: { // 添加一条todo add() { this.todoList.push(this.inputVal); }, // 清空记事本 clear() { this.todoList = []; }, // 删除指定的todo destroy(index) { this.todoList.splice(index, 1); }, }, }); </script>
      </body>
    </html>

## CSS ##

html, body { 
      margin: 0;
      padding: 0;
    }
    body { 
      background: #fff;
    }
    button { 
      margin: 0;
      padding: 0;
      border: 0;
      background: none;
      font-size: 100%;
      vertical-align: baseline;
      font-family: inherit;
      font-weight: inherit;
      color: inherit;
      -webkit-appearance: none;
      appearance: none;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    
    body { 
      font: 14px "Helvetica Neue", Helvetica, Arial, sans-serif;
      line-height: 1.4em;
      background: #f5f5f5;
      color: #4d4d4d;
      min-width: 230px;
      max-width: 550px;
      margin: 0 auto;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      font-weight: 300;
    }
    
    :focus { 
      outline: 0;
    }
    
    .hidden { 
      display: none;
    }
    
    #todoapp { 
      background: #fff;
      margin: 180px 0 40px 0;
      position: relative;
      box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.2), 0 25px 50px 0 rgba(0, 0, 0, 0.1);
    }
    
    #todoapp input::-webkit-input-placeholder { 
      font-style: italic;
      font-weight: 300;
      color: #e6e6e6;
    }
    
    #todoapp input::-moz-placeholder { 
      font-style: italic;
      font-weight: 300;
      color: #e6e6e6;
    }
    
    #todoapp input::input-placeholder { 
      font-style: italic;
      font-weight: 300;
      color: gray;
    }
    
    #todoapp h1 { 
      position: absolute;
      top: -160px;
      width: 100%;
      font-size: 60px;
      font-weight: 100;
      text-align: center;
      color: rgba(175, 47, 47, .8);
      -webkit-text-rendering: optimizeLegibility;
      -moz-text-rendering: optimizeLegibility;
      text-rendering: optimizeLegibility;
    }
    
    .new-todo, .edit { 
      position: relative;
      margin: 0;
      width: 100%;
      font-size: 24px;
      font-family: inherit;
      font-weight: inherit;
      line-height: 1.4em;
      border: 0;
      color: inherit;
      padding: 6px;
      border: 1px solid #999;
      box-shadow: inset 0 -1px 5px 0 rgba(0, 0, 0, 0.2);
      box-sizing: border-box;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    
    .new-todo { 
      padding: 16px;
      border: none;
      background: rgba(0, 0, 0, 0.003);
      box-shadow: inset 0 -2px 1px rgba(0, 0, 0, 0.03);
    }
    
    .main { 
      position: relative;
      z-index: 2;
      border-top: 1px solid #e6e6e6;
    }
    
    .toggle-all { 
      width: 1px;
      height: 1px;
      border: none; /* Mobile Safari */
      opacity: 0;
      position: absolute;
      right: 100%;
      bottom: 100%;
    }
    
    .toggle-all + label { 
      width: 60px;
      height: 34px;
      font-size: 0;
      position: absolute;
      top: -52px;
      left: -13px;
      -webkit-transform: rotate(90deg);
      transform: rotate(90deg);
    }
    
    .toggle-all + label:before { 
      content: "❯";
      font-size: 22px;
      color: #e6e6e6;
      padding: 10px 27px 10px 27px;
    }
    
    .toggle-all:checked + label:before { 
      color: #737373;
    }
    
    .todo-list { 
      margin: 0;
      padding: 0;
      list-style: none;
      max-height: 420px;
      overflow: auto;
    }
    
    .todo-list li { 
      position: relative;
      font-size: 24px;
      border-bottom: 1px solid #ededed;
      height: 60px;
      box-sizing: border-box;
    }
    
    .todo-list li:last-child { 
      border-bottom: none;
    }
    
    .todo-list .view .index { 
      position: absolute;
      color: gray;
      left: 10px;
      top: 20px;
      font-size: 16px;
    }
    
    .todo-list li .toggle { 
      text-align: center;
      width: 40px;
      /* auto, since non-WebKit browsers doesn't support input styling */
      height: auto;
      position: absolute;
      top: 0;
      bottom: 0;
      margin: auto 0;
      border: none; /* Mobile Safari */
      -webkit-appearance: none;
      appearance: none;
    }
    
    .todo-list li .toggle { 
      opacity: 0;
    }
    
    .todo-list li .toggle + label { 
      /* Firefox requires `#` to be escaped - https://bugzilla.mozilla.org/show_bug.cgi?id=922433 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/ */
      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");
      background-repeat: no-repeat;
      background-position: center left;
    }
    
    .todo-list li .toggle:checked + label { 
      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");
    }
    
    .todo-list li label { 
      word-break: break-all;
      padding: 15px 15px 15px 60px;
      display: block;
      line-height: 1.2;
      transition: color 0.4s;
    }
    
    .todo-list li.completed label { 
      color: #d9d9d9;
      text-decoration: line-through;
    }
    
    .todo-list li .destroy { 
      display: none;
      position: absolute;
      top: 0;
      right: 10px;
      bottom: 0;
      width: 40px;
      height: 40px;
      margin: auto 0;
      font-size: 30px;
      color: #cc9a9a;
      margin-bottom: 11px;
      transition: color 0.2s ease-out;
    }
    
    .todo-list li .destroy:hover { 
      color: #af5b5e;
    }
    
    .todo-list li .destroy:after { 
      content: "×";
    }
    
    .todo-list li:hover .destroy { 
      display: block;
    }
    
    .todo-list li .edit { 
      display: none;
    }
    
    .todo-list li.editing:last-child { 
      margin-bottom: -1px;
    }
    
    .footer { 
      color: #777;
      padding: 10px 15px;
      height: 20px;
      text-align: center;
      border-top: 1px solid #e6e6e6;
    }
    
    .footer:before { 
      content: "";
      position: absolute;
      right: 0;
      bottom: 0;
      left: 0;
      height: 50px;
      overflow: hidden;
      box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2), 0 8px 0 -3px #f6f6f6,
        0 9px 1px -3px rgba(0, 0, 0, 0.2), 0 16px 0 -6px #f6f6f6,
        0 17px 2px -6px rgba(0, 0, 0, 0.2);
    }
    
    .todo-count { 
      float: left;
      text-align: left;
    }
    
    .todo-count strong { 
      font-weight: 300;
    }
    
    .filters { 
      margin: 0;
      padding: 0;
      list-style: none;
      position: absolute;
      right: 0;
      left: 0;
    }
    
    .filters li { 
      display: inline;
    }
    
    .filters li a { 
      color: inherit;
      margin: 3px;
      padding: 3px 7px;
      text-decoration: none;
      border: 1px solid transparent;
      border-radius: 3px;
    }
    
    .filters li a:hover { 
      border-color: rgba(175, 47, 47, 0.1);
    }
    
    .filters li a.selected { 
      border-color: rgba(175, 47, 47, 0.2);
    }
    
    .clear-completed, html .clear-completed:active { 
      float: right;
      position: relative;
      line-height: 20px;
      text-decoration: none;
      cursor: pointer;
    }
    
    .clear-completed:hover { 
      text-decoration: underline;
    }
    
    .info { 
      margin: 50px auto 0;
      color: #bfbfbf;
      font-size: 15px;
      text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
      text-align: center;
    }
    
    .info p { 
      line-height: 1;
    }
    
    .info a { 
      color: inherit;
      text-decoration: none;
      font-weight: 400;
    }
    
    .info a:hover { 
      text-decoration: underline;
    }
    
    /* Hack to remove background from Mobile Safari. Can't use it globally since it destroys checkboxes in Firefox */
    @media screen and (-webkit-min-device-pixel-ratio: 0) { 
      .toggle-all, .todo-list li .toggle { 
        background: none;
      }
    
      .todo-list li .toggle { 
        height: 40px;
      }
    }
    
    @media (max-width: 430px) { 
      .footer { 
        height: 50px;
      }
    
      .filters { 
        bottom: 10px;
      }
    }

[20210206164153207.gif]: /images/20221024/100edb5bf5f542359e44caa71ba2d9e1.png