TS Playground does not provide ES2017 Object types

[saschanaz]

TypeScript Version: Playground

Search Terms: playground es2017

Code

Object.entries({}) // Property 'entries' does not exist on type 'ObjectConstructor'.

Expected behavior: It should get no error.

Actual behavior: It does get one.

Playground Link: https://www.typescriptlang.org/play/?ssl=1&ssc=18&pln=1&pc=1#code/PIIwVgpgxgLgdBAdjATgSwgZwBQG8C+AlEA

Related Issues:

Couldn't find a relevant place to post an issue. @orta, is it being maintained on https://github.com/orta/typescript-play ?

[jcalz]

Playground issues are found at microsoft/TypeScript-Website (maybe the new issue template here should be updated to indicate that?)

[saschanaz]

Thanks! Could someone transfer this to there? 🙏

[orta]

I think this is about the default lib.d.ts which comes with monaco-typescript

As right now there isn't a way to configure your lib options inside the playground

[mikeaustin]

If someone is exploring the use of TypeScript, this isn't good. "Wow, TS doesn't even support Object.values()". I spent a few minutes toying with the target, Googling, then finally found this thread. I could see if this was a third party site, but this is the official language site. Kudos to the language.

[orta]

Limited time and limited resources, @mikeaustin - you're welcome to take a look at it before I get back to it though?

[mikeaustin]

I can look into it (clone repo, look around), but I probably don't have enough context to work on it. I'll ask questions as they come up.

[David-Else]

@orta Please fix this. I can't ask for help with half my issues on forums as I can't provide a working example using the playground.

It does not work on v1 playground, and seemingly not on v2. I tried the 'export as markdown' option.

At the moment the playground is broken for modern JS syntax. Object.entries is in common use now. Thanks!

TypeScript Version: 3.8.0-beta

Actual behavior:
Property 'entries' does not exist on type 'ObjectConstructor'.

Related Issues:

Code

const rulesToAdd = {
  '@typescript-eslint/no-floating-promises': 'error',
  complexity: ['error', 10],
  'max-lines-per-function': [
    'error',
    {
      max: 50,
      skipBlankLines: true,
      skipComments: true,
      IIFEs: true
    }
  ],
  'max-params': ['error', 3]
};


const removedRuleNames = ['example']


export function outputToConsole(
  removedRules: string[],
  rulesAdded: string[]
): void {
  console.log(``);
}

outputToConsole(removedRuleNames, Object.entries(rulesToAdd));

Output

const rulesToAdd = {
    '@typescript-eslint/no-floating-promises': 'error',
    complexity: ['error', 10],
    'max-lines-per-function': [
        'error',
        {
            max: 50,
            skipBlankLines: true,
            skipComments: true,
            IIFEs: true
        }
    ],
    'max-params': ['error', 3]
};
const removedRuleNames = ['example'];
export function outputToConsole(removedRules, rulesAdded) {
    console.log(``);
}
outputToConsole(removedRuleNames, Object.entries(rulesToAdd));

Compiler Options

{
  "compilerOptions": {
    "noImplicitAny": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "strictBindCallApply": true,
    "noImplicitThis": true,
    "noImplicitReturns": true,
    "alwaysStrict": true,
    "esModuleInterop": true,
    "declaration": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "moduleResolution": 2,
    "target": "ES2017",
    "jsx": "React",
    "module": "ESNext"
  }
}

Playground Link: Provided

[orta]

Making sure this is linked to #7

The latest Monaco's now ship with ES2015

[orta]

@RyanCavanaugh brought up the idea that maybe the playground should just ship with ESNext's bundled dts instead which is probably the right solution

[devuxer]

@orta, What about the idea of exposing the "lib" compiler option, or is that something the Monaco editor is unable to support?

[orta]

This should probably be closed now that microsoft/monaco-typescript#64 exists, once this is in released built then I was planning on adding a lib option