my system is windows8, and now I am developing Mini Program with mpvue. After downloading demo, it is no problem to use npm run dev to change the contents inside, and cmd can also be displayed successfully. But I have been using cmd:npm run dev since I wrote the template into src. I have been displaying this all the time. Do not show successful interface 
mpvuedemo
the script of some components is useless and script will be added as soon as it is deleted.
solved! First of all, delete the dist and node-module files, and run them again. Finally, the format of tarBar is wrong
encounter the same problem, depressed, not even a prompt
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