### Install js-jsonl using npm

Source: https://github.com/leonsilicon/js-jsonl/blob/main/readme.md

Installs the js-jsonl package from npm. This is the first step to using the library in your project.

```shell
npm install js-jsonl
```

--------------------------------

### Parse and Stringify JSONL Data in TypeScript

Source: https://github.com/leonsilicon/js-jsonl/blob/main/readme.md

Demonstrates how to parse a JSONL string into a JavaScript array and stringify a JavaScript array back into a JSONL string using the js-jsonl library. It also shows type safety with TypeScript generics.

```typescript
import { jsonl } from 'js-jsonl';

const jsonlString = `
  ["Name", "Session", "Score", "Completed"]
  ["Gilbert", "2013", 24, true]
  ["Alexa", "2013", 29, true]
  ["May", "2012B", 14, false]
  ["Deloise", "2012A", 19, true]
`;

const jsonlParsed = [
  ["Name", "Session", "Score", "Completed"],
  ["Gilbert", "2013", 24, true],
  ["Alexa", "2013", 29, true],
  ["May", "2012B", 14, false],
  ["Deloise", "2012A", 19, true]
];

expect(jsonl.parse(jsonlString)).toEqual(jsonlParsed);
expect(jsonl.stringify(jsonlParsed)).toEqual(jsonlString);

// Also works with TypeScript!

const fooBar = jsonl.parse<{ foo: 'bar' }>("{foo: 'bar'}");
const fooBarString = jsonl.stringify(fooBar)
const fooBarParsed: { foo: 'bar' } = jsonl.parse(fooBarString); // no type error!
```

--------------------------------

### Infer JSONL Type with JsonlInfer in TypeScript

Source: https://github.com/leonsilicon/js-jsonl/blob/main/readme.md

Illustrates how to use the `JsonlInfer` helper from the js-jsonl library to infer the TypeScript type of parsed JSONL data. This enhances type safety when working with structured JSONL content.

```typescript
import { jsonl } from 'js-jsonl';
import type { JsonlInfer } from 'js-jsonl';

const fooBar = jsonl.parse<{ foo: string }>("{foo: 'bar'}\n{foo: 'baz'}");
type FooBarParsed = JsonlInfer<typeof fooBar> // { foo: string }
```

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