You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
52 lines
1.4 KiB
52 lines
1.4 KiB
3 years ago
|
<!DOCTYPE html>
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<meta charset="UTF-8">
|
||
|
|
<title>总结生命周期</title>
|
||
|
|
<script type="text/javascript" src="../vue.js"></script>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div id="root">
|
||
|
|
<h2 v-if="isShowHello">你好</h2>
|
||
|
|
<h2 :style="{opacity}">欢迎学习Vue</h2>
|
||
|
|
<button @click="opacity = 1">透明度设置为1</button>
|
||
|
|
<button @click="stop">停止变换</button>
|
||
|
|
</div>
|
||
|
|
<script type="text/javascript">
|
||
|
|
Vue.config.productionTip = false // 组织开发环境提示
|
||
|
|
|
||
|
|
// 创建Vue实例
|
||
|
|
const vm = new Vue({
|
||
|
|
el: '#root',
|
||
|
|
data: {
|
||
|
|
isShowHello: true,
|
||
|
|
opacity: 1
|
||
|
|
},
|
||
|
|
methods: {
|
||
|
|
stop() {
|
||
|
|
this.$destroy()
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
// Vue完成模板解析，并把真实的DOM放入页面后调用mounted注意这里是方法函数，不是对象，刷新页面不会调用mounted
|
||
|
|
mounted() {
|
||
|
|
console.log('mounted')
|
||
|
|
this.timer = setInterval(() => {
|
||
|
|
console.log("setInterval")
|
||
|
|
this.opacity -= 0.01
|
||
|
|
if (this.opacity <= 0) this.opacity = 1
|
||
|
|
}, 16)
|
||
|
|
},
|
||
|
|
beforeDestroy() {
|
||
|
|
console.log("beforeDestroy-清除定时器")
|
||
|
|
clearInterval(this.timer)
|
||
|
|
}
|
||
|
|
})
|
||
|
|
// setInterval(()=>{
|
||
|
|
// vm.opacity -= 0.01
|
||
|
|
// if (vm.opacity <= 0) vm.opacity = 1
|
||
|
|
// },16)
|
||
|
|
</script>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|