用vue实现一个简单的网页桌面时钟，主要包括时钟显示、计时、暂停、重置等几个功能。
效果图如下，页面刚进来的时候是一个时钟，时钟上显示的时、分、秒为当前实际时间，点击计时器按钮后，页面变成一个计时器，并且计时器按钮被暂停与重置两个按钮替代，分别对计时器进行暂停和重置，若点击时钟按钮会切换回时钟界面。
代码如下：
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>时钟</title> <style type="text/css"> .clock { width: 400px; height: 180px; line-height: 180px; border: 10px solid #aaa; border-radius: 10px; margin: 120px auto; background: pink; text-align: center; position: relative; box-shadow: 0px 5px 20px rgba(0,0,0,.6); } .clock .text { font-size: 70px; font-weight: bold; color: rgba(0,0,0,.7); } .clock .btn { position: absolute; /*top: -66px;*/ bottom: -66px; border: none; outline: none; width: 80px; height: 36px; border-radius: 4px; font-size: 16px; background: #aaa; cursor: pointer; box-shadow: 0px 5px 20px rgba(0,0,0,.6); } .clock .btn:hover { opacity: 0.8; } .clock .btn-clock { left: 110px; } .clock .btn-clock.to-left { left: 60px; } .clock .btn-timer { right: 110px; } .clock .btn-suspend { right: 160px; } .clock .btn-reset { right: 60px; } </style> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> </head> <body> <div> <div> <span v-if="index == 0"> {{ hour }}:{{ min }}:{{ sec }} </span> <span v-else> {{ min }}:{{ sec }}:{{ msec }} </span> <button @click="selectClock" :class="{'to-left': index != 0}">时钟</button> <button @click="selectTimer" v-if="index == 0"> <span>计时器</span> </button> <button @click="suspendTimer" v-if="index > 0"> <span v-if="index == 1">暂停</span> <span v-if="index == 2">开始</span> </button> <button @click="resetTimer" v-if="index == 1 || index == 2"> <span>重置</span> </button> </div> </div> <script type="text/javascript"> var app = new Vue({ el: '#app', data: { index: 0, // 0表示时钟页面，1表示计时器计时状态，2表示计时器暂停状态 hour: '00', // 页面显示的数值 min: '00', sec: '00', msec: '00', h: 0, // 临时保存的数值 m: 0, s: 0, ms: 0, timer: null, date: null }, // 监视器 watch: { index(newValue, oldValue) { clearInterval(this.timer); this.timer = null; this.date = null; // 从时钟页面click过来 或 从计时器页面click过来 if (oldValue == 0 || newValue == 0) { // index等于2时数据保留 this.hour = '00'; this.min = '00'; this.sec = '00'; this.msec = '00'; this.h = 0; this.m = 0; this.s = 0; this.ms = 0; } this.autoMove(); } }, methods: { // 自动计时 autoMove() { if (this.index == 0) { this.timer = setInterval(res => { this.date = new Date(); this.h = this.date.getHours(); this.m = this.date.getMinutes(); this.s = this.date.getSeconds(); this.hour = this.h > 9 ? this.h : '0' + this.h; this.min = this.m > 9 ? this.m : '0' + this.m; this.sec = this.s > 9 ? this.s : '0' + this.s; }, 1000); } else if (this.index == 1){ this.timer = setInterval(res => { this.ms ++; if (this.ms == 100) { this.s ++; this.ms = 0; } if (this.s == 60) { this.m ++; this.s = 0; } this.msec = this.ms > 9 ? this.ms : '0' + this.ms; this.min = this.m > 9 ? this.m : '0' + this.m; this.sec = this.s > 9 ? this.s : '0' + this.s; }, 10); } }, // 选择时钟 selectClock() { this.index = 0; }, // 选择计时器 selectTimer() { this.index = 1; }, // 开始、暂停计时器 suspendTimer() { if (this.index == 1) { this.index = 2; } else if (this.index == 2) { this.index = 1; } }, // 重置计时器 resetTimer() { this.index = 0; setTimeout(res => { this.index = 1; }, 1); } }, mounted() { this.autoMove(); } }) </script> </body> </html>