Cannot do 'npm start'

Hi there,

I was trying to follow the instruction in:

Daml 101: Meet Your Tools: Script, Sandbox, & Navigator [2021]

at 7:25 / 15:00, the guy typed in ‘npm start’, which was working, but when I did that it was just errors like this:

image1310×910 108 KB

why it was like that and how can I fix it? Thank you!
Btw, I have no coding experience.

Great question, and welcome to the Forum.

I do not have a Mac but I did a quick look at the video from 7:00 minutes plus and I think it is possible that you missed a step.

Rough process:

• You make the app
• Change into the /ui directory
• Install the NPM components globally into the system
• Install the project specific NPM bits
• Start the app with the installed NPM bits

A screenshot attached with the step highlighted in Red.

Hope this helps.

Screenshot from 2022-03-02 16-34-41749×592 353 KB

Hi @JimYe

The error points to a path /User/yezhi0827/package.json suggesting that you’re trying to run the command from your user folder and not a daml project folder.

As @Ben_M suggested you need to first create a Daml project using daml assistant and then go through the process

Hi Ben,

Thank you very much! It works!

There are no errors anymore.

However, I still did not get the result like this:

image1258×884 80.9 KB

And once the guy got this result, a login window pops up:

image1634×1122 76.8 KB

Instead, this is what I got, and there was no login window:

image1646×1162 149 KB

why?

Did you run npm install first in the ui folder?

Omg, it works!

but why it was just blank? I’ve checked the address, they are the same:

image2326×1750 166 KB

image1672×1098 80.4 KB

And it seems I got another error in Terminal:

image1170×742 41.3 KB

That looks like you may have skipped the daml start step.

Once a topic is marked as solved, people tend not to look at it anymore. If you have further questions, it’s usually better to open a new topic.