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Refactor ESLint config to resolve tseslint.config deprecation warnings #4228

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Refactor ESLint config to resolve tseslint.config deprecation warnings #4228

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94 changes: 47 additions & 47 deletions src/content/9/en/part9b.md
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Original file line number Diff line number Diff line change
Expand Up @@ -904,25 +904,25 @@ npm install --save-dev eslint @eslint/js @types/eslint__js typescript typescript
We will configure ESlint to [disallow explicit any](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/docs/rules/no-explicit-any.mdx). Write the following rules to *eslint.config.mjs*:

```js
import eslint from '@eslint/js';
import tseslint from 'typescript-eslint';

export default tseslint.config({
files: ['**/*.ts'],
extends: [
eslint.configs.recommended,
...tseslint.configs.recommendedTypeChecked,
],
languageOptions: {
parserOptions: {
project: true,
tsconfigRootDir: import.meta.dirname,
import eslint from "@eslint/js";
import tseslint from "typescript-eslint";

export default [
eslint.configs.recommended,
...tseslint.configs.recommendedTypeChecked,
{
files: ["**/*.ts"],
languageOptions: {
parserOptions: {
project: true,
tsconfigRootDir: import.meta.dirname,
},
},
rules: {
"@typescript-eslint/no-explicit-any": "error",
},
},
rules: {
'@typescript-eslint/no-explicit-any': 'error',
},
});
];
```

Let us also set up a *lint* npm script to inspect the files by modifying the *package.json* file:
Expand Down Expand Up @@ -955,39 +955,39 @@ npm install --save-dev @stylistic/eslint-plugin
Our final *eslint.config.mjs* looks as follows:

```js
import eslint from '@eslint/js';
import tseslint from 'typescript-eslint';
import eslint from "@eslint/js";
import tseslint from "typescript-eslint";
import stylistic from "@stylistic/eslint-plugin";

export default tseslint.config({
files: ['**/*.ts'],
extends: [
eslint.configs.recommended,
...tseslint.configs.recommendedTypeChecked,
],
languageOptions: {
parserOptions: {
project: true,
tsconfigRootDir: import.meta.dirname,
export default [
eslint.configs.recommended,
...tseslint.configs.recommendedTypeChecked,
{
files: ["**/*.ts"],
languageOptions: {
parserOptions: {
project: true,
tsconfigRootDir: import.meta.dirname,
},
},
},
plugins: {
"@stylistic": stylistic,
},
rules: {
'@stylistic/semi': 'error',
'@typescript-eslint/no-unsafe-assignment': 'error',
'@typescript-eslint/no-explicit-any': 'error',
'@typescript-eslint/explicit-function-return-type': 'off',
'@typescript-eslint/explicit-module-boundary-types': 'off',
'@typescript-eslint/restrict-template-expressions': 'off',
'@typescript-eslint/restrict-plus-operands': 'off',
'@typescript-eslint/no-unused-vars': [
'error',
{ 'argsIgnorePattern': '^_' }
],
},
});
plugins: {
"@stylistic": stylistic,
},
rules: {
"@stylistic/semi": "error",
"@typescript-eslint/no-unsafe-assignment": "error",
"@typescript-eslint/no-explicit-any": "error",
"@typescript-eslint/explicit-function-return-type": "off",
"@typescript-eslint/explicit-module-boundary-types": "off",
"@typescript-eslint/restrict-template-expressions": "off",
"@typescript-eslint/restrict-plus-operands": "off",
"@typescript-eslint/no-unused-vars": [
"error",
{ argsIgnorePattern: "^_" },
],
},
}
];
```

Quite a few semicolons are missing, but those are easy to add. We also have to solve the ESlint issues concerning the *any* type:
Expand Down