when I initial a new project, I used commands as follows: vue init webpack my-pro cd my-pro/ npm install npm run dev then, it shows : " DONE Compiled successfully in 5653ms Your application is running here: http://localhost:8080" in command line", but when I open chrome and address in localhost:8080, there is an error: "Uncaught SyntaxError: Use of const in strict mode. " so, how could I solve it? ps: node version v8.8.0