Question 207831 in Javascript Question posted in
A very good W3school tutorial can be found here.

Javascript – Stenciljs throwing build error after fresh install

So for context, I have just installed stencil. And was wanting to mess around with it. I’m using latest version from the docs "npm install -g @stencil/core@latest –save-exact" and when I ran it the first time with npm start, It threw a bunch of errors and complained about missing library. So I ran npm install it fixed all those errors but now it throws a new error, when I try to run it. Keep in mind I have not edited or added any of my own code to the project. Error below. enter image description here Ignore the border thats my screenshot tool)

[ ERROR ] TypeScript: ./node_modules/@types/babel__traverse/index.d.ts:321:6
An index signature parameter type must be either ‘string’ or ‘number’.

L320:      // this is good enough for non-visitor traverse options e.g. `noScope`
L321:      [k: `${string}|${string}`]: VisitNode<S, Node>;
L322:  };
[01:19.3] build failed, watching for changes… in 2.96 s`

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2

Answers


  1. 0

    You shouldn’t have to globally install @stencil/core (I don’t know of any advantage).

    Instead you can initialise a new Stencil project with npm init stencil which will ask for the starter project (component or app) and the project name. I just tried that and it works without problem.

    I’m not familiar with the error you’re receiving, but I’m guessing installing Stencil globally has something to do with it.

    I suggest you try:

    npm uninstall -g @stencil/core
npm init stencil component stencil-test-project
cd stencil-test-project
npm install
npm start

    This should create a new project, start the dev server and open the browser.

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  2. 0

    This is a known issue with @types/babel__traverse v7.21.0 and later. We worked around the issue by installing v7.20.0.

    npm install --save-dev @types/[email protected]

    and then modifying the package.json to remove the ^:

    "@types/babel__traverse": "7.20.0"
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