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9demo.html
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9demo.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 9demo</title>
<script type="text/javascript" src="./js/vue.js"></script>
<script type="text/javascript" src="./js/vuex.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({});
// 记得 new 单词， new Vuex.Store 而非 Vuex.Store
var store = new Vuex.Store({
state: {
count: 0
},
mutations: {
add: function(state) {
state.count++
},
remove: function(state) {
state.count--
}
}
})
var vm3 = new Vue({
el: "#app",
computed:{
count : function(){
return store.state.count;
}
},
components: {
"my-addbtn": {
template: `<button @click="setCount">+</button>`,
// props:["count"],
methods: {
setCount: function() {
// busVm.$emit("changeEvents",this.count + 1)
store.commit("add")
}
},
},
"my-removebtn": {
template: `<button @click="setCount">-</button>`,
// props:["count"],
methods: {
setCount: function() {
// busVm.$emit("changeEvents",this.count - 1)
store.commit("remove")
}
},
},
},
})
/*
1. 空实例与自定义事件
$emit
$on
2.Vuex 状态管理
state
mutations
commit
*/
</script>
</body>
</html>