How to set configuration? about tslab HOT 9 OPEN

Hi are there future plans to support a tsconfig file? I need to enable -resolveJsonModule in order to import JSON files.

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Internal compiler flags of tslab are defined in https://github.com/yunabe/tslab/blob/master/src/converter.ts (Ctrl-F esModuleInterop).

At this moment, it's not possible to control the internal compiler flags in tslab. As a short-term solution, I enabled experimentalDecorators in tslab (4ba7e17) and released the new version (v1.0.9).

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thanks

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I'm having an issue which may be related, i.e. a configuration option. I am unable to use console, as it will produce the following error:

Cannot find name 'console'. Do you need to change your target library? Try changing the `lib` compiler option to include 'dom'.

Looking at how the config is set up I see an isBrowser flag which adds dom (which is required to be able to use console). Apparently this is not being set, any pointers to track down why this is happening would be apprectated!

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I am unable to use console, as it will produce the following error:

It's weird. Although we don't set dom to lib, tslab still should be able to find the definition of console from @types/node. Can you use other Node.js libraries like process.version? If you can not, tslab failed to load @types/node in your environment for some reason.

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That will probably be it, same message when calling process.version. @types/nodes are on my system though (via debian packages node-typescript and node-typescript-types with nodejs v12.16.2). I won't be investigating further since I noticed jslab is actually doing typechecking and more which isn't what I expected (was looking to use as educational JS tool). E.g. was expecting this to just work:

var a = "world";
a = 42;

Apart from this, I really like the work you have done with this kernel implementation, will surely revisit some other time!

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I have the same problem, and after run yarn add @types/node, the error was disappered.
But there are another errors, i have no idea how to fix it.

when I run the https://github.com/yunabe/tslab-examples/blob/master/notebooks/getting_started.ipynb file locally, the following error occurs:

    // This is 40x slower if you use Python.
    const n = 40;
    const start = Date.now()
    console.log(`naiveFib(${n}) = ${naiveFib(n)} (took ${Date.now() - start}ms)`)

4:19 - Cannot find name 'Date'.
5:58 - Cannot find name 'Date'.

my tsconfig.json is the same as the example:

{
  "compilerOptions": {
    "outDir": "lib",
    "module": "commonjs",
    "esModuleInterop": true,
    "target": "ES2017",
    "lib": ["es2017"],
    "newLine": "LF",
    "rootDir": "src",
    "skipLibCheck": true,
    "declaration": true,
    "noImplicitAny": true
  },
  "include": ["src/**/*"]
}

and then I test Set and other parsts of the example file, the same as Date:

let a=new Set()
1:11 - Cannot find name 'Set'. Do you need to change your target library? Try changing the `lib` compiler option to es2015 or later.

let sleep = (ms: number) => new Promise(resolve => setTimeout(resolve, ms));
const start = Date.now();
// Top-level await.
await sleep(500);
`Slept ${Date.now() - start}[ms]`


1:33 - Cannot find name 'Promise'. Do you need to change your target library? Try changing the `lib` compiler option to es2015 or later.
2:15 - Cannot find name 'Date'.
5:10 - Cannot find name 'Date'.


{
    // class
    class MyObj {
        abc: number;
        xyz: string;
        constructor(abc: number, xyz: string) {
            this.abc = abc;
            this.xyz = xyz;
        }
    }
    // const and let
    const obj = new MyObj(123, 'hello');
    // Destructuring
    let {abc, xyz: klm} =  obj;
    // Enhanced Object Literals
    console.log({abc, klm});
    
    // Spread
    let [x, y, z] = [1, 2, 3];
    console.log({x, y, z})
    
    // Generator and for-of
    let array: number[] = [];
    for (let e of (function*(n: number) {
        for (let i = 0; i < n; i += 2) {
            yield i;
        }
    })(10)) {
        array.push(e * e);
    }
    console.log('array =', array);
}
19:9 - Type '[number, number, number]' must have a '[Symbol.iterator]()' method that returns an iterator.
24:19 - Type '{}' must have a '[Symbol.iterator]()' method that returns an iterator.
29:15 - Property 'push' does not exist on type '{}'.

what's wrong about my config?

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I am having a similar issue. I am trying to use the new VSCode native integration.

fetch()
1:1 - Cannot find name 'fetch'.

However, Date() works.

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