vm
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <title>Title</title> </head> <body> <!--视图层变成了 模板--> <div id="app"> <p> {{message}} </p> </div> <!--导入vue.js--> <script> var a=new Vue({ el:'#app', data:{ message: "hello,你好" } }) </script> </body> </html>