HTML VUE
VUE
目录
- VUE
-
- 创建vue
-
- 练习 计数器
- 数据绑定
- 双向绑定
- 对象数组
- 实例 记事本
创建vue
我们再导入的时候选择第一个，第二个是压缩过得，会少的提示
注意文件名不可以为中文
webStorm 创建方式
vue 有两种方法
这里推荐上面注释掉的方法
这两种都是一样的，就是后面的东西只适配上面的一种
简写单击时间
这些都是不传值的方法
这里的方法的两种写法
下面是传值方法
双击事件
值改变时间
失去焦点
这里是输入了1，然后点击勒空白页面
键盘事件
输入值后按回车
练习 计数器
题目
css
body{
background-color: #f5f5f5;
}
#app {
width: 480px;
height: 80px;
margin: 200px auto;
}
.input-num {
margin-top:20px;
height: 100%;
display: flex;
border-radius: 10px;
overflow: hidden;
box-shadow: 4px 4px 4px #adadad;
border: 1px solid #c7c7c7;
background-color: #c7c7c7;
}
.input-num button {
width: 150px;
height: 100%;
font-size: 40px;
color: #ad2a27;
cursor: pointer;
border: none;
outline: none;
background-color:rgba(0, 0, 0, 0);
}
.input-num span {
height: 100%;
font-size: 40px;
flex: 1;
text-align: center;
line-height: 80px;
font-family:auto;
background-color: white;
}
img{
float: right;
margin-top: 50px;
}
页面
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>计数器title>
<link rel="stylesheet" href="./css/index.css" />
head>
<body>
<div id="app">
<div class="input-num">
<button >
-
button>
<span>1span>
<button >
+
button>
div>
div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js">script>
<script>
// 创建Vue实例
script>
body>
html>
答案
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<meta http-equiv="X-UA-Compatible" content="ie=edge"/>
<title>计数器title>
<link rel="stylesheet" href="./css/index.css"/>
head>
<body>
<div id="app">
<div class="input-num">
<button @click="num--">
-
button>
<span>{{num}}span>
<button @click="num++">
+
button>
div>
div>
<script src="../js/vue.js" type="text/javascript" charset="utf-8">script>
<script>
// 创建Vue实例
new Vue({
el:"#app",
data: {
num:1
},
<!--复杂版-->
// methods: {
// deletenum() {
// // 数字减一
// // num = num - 1;
// this.num--;
// },
// addnum() {
// // 数字加一
// num = num + 1;
// }
// }
})
script>
body>
html>
数据绑定
双向绑定
实例1
实例2
这里点击按钮后所有的值会变成你好
对象数组
获取对象中对象的值
数组取值
遍历数组
循环行
h1
循环列
实例 记事本
页面
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<title>小黑记事本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>小黑记事本h1>
<input autofocus="autofocus" autocomplete="off" placeholder="请输入任务"
class="new-todo" />
header>
<section class="main">
<ul class="todo-list">
<li class="todo" >
<div class="view">
<span class="index">span>
<label>label>
<button class="destroy" @click="">button>
div>
li>
ul>
section>
<footer class="footer" >
<span class="todo-count">
<strong>1strong> items left
span>
<button class="clear-completed">
Clear
button>
footer>
section>
<footer class="info">
footer>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js">script>
<script>
script>
body>
html>
js
const app = new Vue({
el: "#todoapp",
data: {
// 总数据
todoList: ["吃饭饭", "睡觉觉", "写代码"],
// 输入的内容
inputValue: "",
},
// 方法
methods: {
// 增加任务
addTodo() {
this.todoList.push(this.inputValue);
},
// 删除任务
delTodo(index) {
this.todoList.splice(index, 1);
},
clearTodo() {
this.todoList = [];
}
}
});
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;
}
}
下面是页面截图，可以参考
答案
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<title>小黑记事本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>小黑记事本h1>
<input autofocus="autofocus" autocomplete="off" placeholder="请输入任务"
class="new-todo" v-model="testmsg" @keyup.enter="addtestmsg"/>
header>
<section class="main">
<ul class="todo-list">
<li class="todo" v-for="(x,i) in arr">
<div class="view">
<span class="index">{{i+1}}.span>
<label>{{x}}label>
<button class="destroy" @click="deleteArr(i)">button>
div>
li>
ul>
section>
<footer class="footer" >
<span class="todo-count">
<strong>{{arr.length}}}strong> items left
span>
<button class="clear-completed" @click="clearArr">
Clear
button>
footer>
section>
<footer class="info">
{{testmsg}}--{{arr}}
footer>
<script src="../js/vue.js" type="text/javascript" charset="utf-8">script>
<script>
new Vue({
el:'#todoapp',
data:{
testmsg:'',
arr:[]
},
methods:{
addtestmsg(){
// 添加数据到最后一位
this.arr.push(this.testmsg)
},
clearArr(){
// 清空数组
this.arr = [];
},
deleteArr(v){
console.log(v)
this.arr.splice(v,1)
}
}
})
script>
body>
html>