vue定义全局组件

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<link href="https://cdn.bootcss.com/twitter-bootstrap/4.1.3/css/bootstrap.css" rel="stylesheet">
</head>
<body>
<div id="app">
<my-com1></my-com1>
<my2></my2>
<mycon3></mycon3>
<counter></counter>
</div>
<script src="https://cdn.bootcss.com/vue/2.5.20/vue.min.js"></script>
<script src="https://cdn.bootcss.com/vue-resource/1.5.1/vue-resource.min.js"></script>
<script>
let com1 = Vue.extend({
template:'<h2>vue创建组件</h2>'
})
Vue.component('myCom1',com1);
Vue.component('my2',{
template:'<div><h1>myw</h1></div>'
})

Vue.component('mycon3',{
template:'<h1>{{msg}}</h1>',
data:function(){
return{
msg:'组件定义data数据'
}
}
})
//var dataObj = {count:0}//共享
Vue.component('counter',{
template:'<div><input type="button" value="+1" @click="inc"><h3>{{count}}</h3></div>',
data:function(){
return {count:0};
},
methods:{
inc(){
this.count++;
}
}
})
var vm = new Vue({
el:'#app',
data:{

},
methods:{

}
})
</script>
</body>
</html>