Vue 事件绑定机制详解
一、核心概念
Vue 的事件绑定系统是其交互功能的核心，通过 v-on 指令（简写 @）实现。下面我将详细解释 Vue 事件绑定的各个方面。
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Vue 事件绑定详解</title>
<script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script>
<style>
* {
box-sizing: border-box;
margin: 0;
padding: 0;
}
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
line-height: 1.6;
color: #2c3e50;
background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
min-height: 100vh;
padding: 20px;
}
.container {
max-width: 1200px;
margin: 0 auto;
}
header {
text-align: center;
padding: 30px 0;
margin-bottom: 30px;
}
h1 {
font-size: 2.8rem;
margin-bottom: 15px;
color: #34495e;
}
.subtitle {
color: #7f8c8d;
font-size: 1.3rem;
max-width: 800px;
margin: 0 auto;
}
.content {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
gap: 25px;
margin-bottom: 40px;
}
.card {
background: white;
border-radius: 12px;
box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
padding: 30px;
transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
transform: translateY(-5px);
box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}
.card-header {
margin-bottom: 20px;
padding-bottom: 15px;
border-bottom: 2px solid #f0f4f8;
display: flex;
align-items: center;
gap: 15px;
}
.card-header h2 {
font-size: 1.8rem;
color: #2c3e50;
}
.icon {
font-size: 2rem;
color: #42b983;
width: 50px;
height: 50px;
display: flex;
align-items: center;
justify-content: center;
background: #e8f5e9;
border-radius: 50%;
}
.explanation {
margin-bottom: 25px;
}
.explanation p {
margin-bottom: 15px;
line-height: 1.7;
}
.code-block {
background: #2d2d2d;
color: #f8f8f2;
padding: 20px;
border-radius: 8px;
font-family: 'Fira Code', monospace;
font-size: 15px;
overflow-x: auto;
margin: 20px 0;
position: relative;
}
.code-header {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: 15px;
color: #a9b7c6;
}
.code-keyword {
color: #cc7832;
}
.code-function {
color: #ffc66d;
}
.code-string {
color: #6a8759;
}
.code-comment {
color: #808080;
}
.demo-area {
background: #f8fafc;
padding: 25px;
border-radius: 8px;
margin-top: 20px;
border: 1px solid #e2e8f0;
}
.demo-area h3 {
margin-bottom: 20px;
color: #2c3e50;
font-size: 1.4rem;
display: flex;
align-items: center;
gap: 10px;
}
.demo-area h3 i {
color: #42b983;
font-size: 1.8rem;
}
.control-group {
margin-bottom: 20px;
padding: 15px;
background: white;
border-radius: 8px;
box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}
.control-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: #2c3e50;
}
input[type="text"], input[type="number"], textarea {
width: 100%;
padding: 14px;
border: 1px solid #ddd;
border-radius: 8px;
font-size: 16px;
transition: border-color 0.3s, box-shadow 0.3s;
}
input:focus, textarea:focus {
outline: none;
border-color: #42b983;
box-shadow: 0 0 0 3px rgba(66, 185, 131, 0.2);
}
button {
background: #42b983;
color: white;
border: none;
padding: 14px 24px;
border-radius: 8px;
cursor: pointer;
font-size: 16px;
font-weight: 600;
transition: background 0.3s, transform 0.2s;
display: inline-flex;
align-items: center;
gap: 8px;
margin-right: 10px;
margin-bottom: 10px;
}
button:hover {
background: #3aa776;
transform: translateY(-2px);
}
button.secondary {
background: #3498db;
}
button.secondary:hover {
background: #2980b9;
}
button.warning {
background: #e74c3c;
}
button.warning:hover {
background: #c0392b;
}
.output {
margin-top: 20px;
padding: 20px;
background: white;
border-radius: 8px;
border-left: 4px solid #42b983;
font-family: 'Fira Code', monospace;
min-height: 60px;
white-space: pre-wrap;
}
.event-log {
background: #1e1e1e;
color: #d4d4d4;
padding: 20px;
border-radius: 8px;
margin-top: 20px;
font-family: 'Fira Code', monospace;
max-height: 300px;
overflow-y: auto;
font-size: 14px;
}
.log-entry {
margin-bottom: 8px;
padding-bottom: 8px;
border-bottom: 1px solid #333;
display: flex;
gap: 10px;
}
.log-time {
color: #6a9955;
flex-shrink: 0;
}
.log-content {
flex-grow: 1;
}
.highlight {
background-color: #fff9c4;
padding: 2px 4px;
border-radius: 3px;
color: #333;
}
.note {
background: #e3f2fd;
border-left: 4px solid #2196f3;
padding: 20px;
margin: 25px 0;
border-radius: 0 8px 8px 0;
}
.warning {
background: #fff3cd;
border-left: 4px solid #ffc107;
padding: 20px;
margin: 25px 0;
border-radius: 0 8px 8px 0;
}
.summary-table {
width: 100%;
border-collapse: collapse;
margin: 25px 0;
background: white;
border-radius: 8px;
overflow: hidden;
box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}
.summary-table th, .summary-table td {
border: 1px solid #e2e8f0;
padding: 16px;
text-align: left;
}
.summary-table th {
background-color: #f8fafc;
font-weight: 600;
color: #2c3e50;
}
.summary-table tr:nth-child(even) {
background-color: #f8fafc;
}
.summary-table tr:hover {
background-color: #f0f4f8;
}
@media (max-width: 768px) {
.content {
grid-template-columns: 1fr;
}
h1 {
font-size: 2.2rem;
}
}