https://github.com/fibo/read-file-utf8

reads content from file using utf-8 encoding
https://github.com/fibo/read-file-utf8

promise readfile utf8

Last synced: 7 days ago
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reads content from file using utf-8 encoding

• Host: GitHub
• URL: https://github.com/fibo/read-file-utf8
• Owner: fibo
• Created: 2016-04-19T09:40:27.000Z (over 8 years ago)
• Default Branch: main
• Last Pushed: 2023-10-22T11:08:52.000Z (about 1 year ago)
• Last Synced: 2024-04-23T11:18:26.819Z (7 months ago)
• Topics: promise, readfile, utf8
• Language: JavaScript
• Homepage: http://g14n.info/read-file-utf8
• Size: 47.9 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# read-file-utf8

> reads content from file using utf-8 encoding, also imports JSON files easily

## Installation

With [npm](https://npmjs.org/) do

```sh

npm install read-file-utf8

```

## Usage

`read(filePath: string): Promise`

Read from a text file.

```js

import read from "read-file-utf8";

const filePath = "path/to/file.txt";

try {

  // Read file content.

  const content = await read(filePath)

  console.log(content)

} catch (error) {

  // In case you do not have permissions,

  // you may want to handle it here.

  console.error(error)

}

```

## Examples

### Import JSON

This makes sense at the time of this writing (2020) since it is not possibile to import JSON using `require` when ES modules are enabled in Node.

Update (2023): you can use import assertions like `import pkg from "./package.json" assert { type: "json" }` but you can a warning:

```

ExperimentalWarning: Import assertions are not a stable feature of the JavaScript language. Avoid relying on their current behavior and syntax as those might change in a future version of Node.js.

```

So, to get attributes from a *package.json* you can do something like the following.

```js

// Read version from package.json file.

// Given the `.json` extension, it is assumed the content is JSON

// and `JSON.parse` is used to parse it.

const { version } = await read("./package.json");

console.log(version)

```

If you are using TypeScript you may need to provide the type of your JSON.

```ts

const { version } = await read<{ version: string }>("./package.json");

```

Or you may want to double check the input declaring it as `unknown` and  use a type-guard.

```ts

const pkg = await read("./package.json");

if (isPackageJson(pkg)) console.log(pkg.version);

```

### Read SQL files

Suppose you have some SQL queries. It is really better to put every query

in its own *queryFile.sql* good old SQL file, instead then inside *someOtherFile.js* JavaScript file.

Create a *sql/* folder and put there all your queries.

Add also a *sql/index.js* with the following content

```js

import { join } from "node:path";

export const sql (fileName) =>

  read(path.join(__dirname, `${fileName}.sql`));

```

Suppose there is a *sql/count_winners.sql* file with the following content

```sql

SELECT COUNT(*) AS num

FROM foo.contest

WHERE is_winner IS TRUE

```

Now you are able to do, for example

```js

import { Client } from "pg";

import sql from "./path/to/sql.js";

const client = new Client();

await client.connect();

const sqlCode = await sql("count_winners");

const res = await client.query(sqlCode);

console.log(res.rows);

```

## See also

- [write-file-utf8](https://github.com/fibo/write-file-utf8)

## License

[MIT](https://fibo.github.io/mit-license/)