npm start command not working for my react app

Question

I am trying to start my react app on localhost:3000 , but when I do npm start I get these error messages :

I am sure it has to do with either npm or my package.json file, but I can't put my finger on exactly what is causing the problem.

This is my package.json file :

Answer 1

尝试在 package.json 中的build命令末尾添加逗号，然后运行 ​​npm start。

Answer 2

Absolutely your package.json file has syntax error, I proffer to you use a better code editor or use a better configuration for your sublime to show your syntax error.

In the end of line:10 you miss a comma , :

"build": "NODE_ENV=production browserify -t [ reactify --es6 ] app.js | uglifyjs > compiled.js", //<== this comma is missed

Answer 3

You are missing a comma on line 10 in your package.json . Add it and it should be fine.