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8demo.html
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8demo.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>vue 8demo</title>
<script src="./js/vue.js"></script>
</head>
<body>
<div id="app">
<div>
{{count}}
</div>
<my-addbtn :count="count"></my-addbtn>
<my-removebtn :count="count"></my-removebtn>
</div>
<script>
var busVm = new Vue({});
var vm3 = new Vue({
el: "#app",
data: {
count: 0,
},
mounted() {
busVm.$on("changeEvents", function(num) {
this.count = num;
}.bind(this));
},
components: {
"my-addbtn": {
template: `<button @click="setCount">+</button>`,
props:["count"],
methods: {
setCount: function() {
busVm.$emit("changeEvents",this.count + 1)
}
},
// data: function () {
// return {
// message: "hello myHeader!!!"
// }
// },
// mounted() {
// busVm.$on("changeEvents", function(str){
// this.message = str;
// }.bind(this));
// },
},
"my-removebtn": {
template: `<button @click="setCount">-</button>`,
props:["count"],
methods: {
setCount: function() {
busVm.$emit("changeEvents",this.count - 1)
}
},
},
},
methods: {
show: function() {
console.log("show")
}
},
})
/*
1. 空实例与自定义事件
$emit
$on
2.Vuex 状态管理
state
mutations
commit
*/
</script>
</body>
</html>