在 create-react-app 后 npm start 不起作用

Question

I am trying to create a react app with the below steps:

1. npm install -g create-react-app
2. create-react-app my-app
3. cd my-app
4. npm start

And I get this error:

In error have suggestion to remove webpack dependency but i cant do that because in file package.json dun have that. Here my package.json

For additional information:

• i am using windows 10
• npm 6.4.1
• create-react-app version 2.0.3
• node v8.12.0

Answer 1

Just do following steps:
- delete package-lock.json.
- delete node_modules.
- npm install.

Or

Just try steps mentioned in the error log and you will be fine .

Answer 2

Do step number 6 and delete that babel loader or webpack folder and you will be good afterwards. Chances are you have an outdated web pack or babel that you installed in a previous project.

Answer 3

I just had this very issue, and turns out to be something simple

The part of the log that says about there being a

"a different version of webpack was detected higher up in the tree"

looks to be the same case for you. I think you may have ran npm install at some point under D:\\bolehDiHapus and so have node_modules installed further up the tree that you meant.

I simply changed the name of D:\\bolehDiHapus\\node_modules (probably best to just delete it) and hey presto npm start works.

Answer 4

I had this same issue, first it started saying we found the wrong version farther up in the tree, and then i had to delete webpack up there, and then i had install their "required version" even if it is lower than latest.

npm install webpack@version --save

in your case: npm install --save webpack@4.19.1