Suppress errors in .ts files using '// @ts-ignore' comments

[ahejlsberg]

We currently support suppressing errors in .js files using // @ts-ignore comments placed above the offending lines. With this PR we extend this support to .ts files as well. For example:

if (false) {
    // @ts-ignore: Unreachable code error
    console.log("hello");
}

A // @ts-ignore comment suppresses all errors that originate on the following line. It is recommended practice to have the remainder of the comment following @ts-ignore explain which error is being suppressed.

Fixes #9448.

[jhalborg]

Hey :)

I can't seem to get this to work. I'm using TS 2.5.3 and VSCode 1.16.1, and I'm trying to ignore the warning I get in the following code.

import * as devConfig from './../../config.dev.json';
import * as prodConfig from './../../config.prod.json';

interface IConfig {
  instagram: {
    clientId: string;
    scopes: object;
  };
  urls: {
    authRedirectURL: string;
    baseAPIURL: string;
    termsURL: string;
  };
  googlePlacesAPIKey: string;
}

const getConfig = (): IConfig => {
  // @ts-ignore: Type 'typeof '*.json'' is not assignable to type 'IConfig'
  return __DEV__ ? devConfig : prodConfig;
};

export { getConfig, IConfig };

Did I miss something?

[ghost]

@jhalborg This feature isn't in typescript@2.5, you'll have to install typescript@next.

[lmcarreiro]

couldn't it be done with the comment in the same line?

let v1: string = 1; // @ts-ignore
let v2: string = 2; // @ts-ignore
let v3: string = 3; // @ts-ignore
let v4: string = 4; // @ts-ignore
let v5: string = 5; // @ts-ignore
let v6: string = 6; // @ts-ignore

instead of:

// @ts-ignore
let v1: string = 1;
// @ts-ignore
let v2: string = 2;
// @ts-ignore
let v3: string = 3;
// @ts-ignore
let v4: string = 4;
// @ts-ignore
let v5: string = 5;
// @ts-ignore
let v6: string = 6;

[basarat]

couldn't it be done with the comment in the same line?

Suppresses error on the next line. Would be confusing if it did too much e.g.

error; // @ts-ignore < Would eat both errors? 
error; 

Simple does one well defined thing is better 🌹