datauri

What is datauri?

The datauri npm package is used to convert file paths or file buffers to Data URI scheme. This is particularly useful for embedding file data directly into HTML or CSS files.

What are datauri's main functionalities?

Convert File Path to Data URI

This feature allows you to convert a file path to a Data URI. The `format` method takes the file extension and the file path as arguments and returns an object containing the Data URI.

const Datauri = require('datauri');
const dUri = new Datauri();
const result = dUri.format('.png', 'path/to/file.png');
console.log(result.content);

Convert Buffer to Data URI

This feature allows you to convert a buffer to a Data URI. The `format` method takes the file extension and the buffer as arguments and returns an object containing the Data URI.

const Datauri = require('datauri');
const dUri = new Datauri();
const buffer = Buffer.from('some data');
const result = dUri.format('.txt', buffer);
console.log(result.content);

Convert File Path to Data URI (Async)

This feature allows you to convert a file path to a Data URI using an asynchronous method. The `promise` method takes the file path as an argument and returns a promise that resolves to the Data URI.

const Datauri = require('datauri');
const dUri = new Datauri();
const result = await dUri.promise('path/to/file.png');
console.log(result);

Other packages similar to datauri

base64-img

The base64-img package allows you to convert images to base64 strings and vice versa. While it is more focused on image files, it provides similar functionality for converting files to Data URIs.

file-base64

The file-base64 package is another alternative that focuses on converting files to base64 strings. It provides a simple API for encoding and decoding files, similar to datauri.

README

Node.js Module and CLI to generate Data URI scheme.

The data URI scheme is a uniform resource identifier (URI) scheme that provides a way to include data in-line in web pages as if they were external resources.

from: Wikipedia

MODULE

npm install -S datauri

Getting started

By default, datauri module returns a promise, which is resolved with data:uri string or rejected with file read error:

const datauri = require('datauri');

const content = await datauri('test/myfile.png');

console.log(content);
//=> "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA..."

Callback style and meta data

const datauri = require('datauri');

datauri('test/myfile.png', (err, content, meta) => {
  if (err) {
    throw err;
  }

  console.log(content); //=> "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA..."

  console.log(meta.mimetype); //=> "image/png"
  console.log(meta.base64); //=> "iVBORw0KGgoAAAANSUhEUgAA..."
});

CSS parser

const datauriCSS = require('datauri/css');

await datauriCSS('test/myfile.png');
//=> "\n.case {\n    background-image: url('data:image/png; base64,iVBORw..."

await datauriCSS('test/myfile.png', {
  className: 'myClass',
  width: true,
  height: true
});
//=> adds image width and height and custom class name

Synchronous calls

const Datauri = require('datauri/sync');
const meta = Datauri('test/myfile.png');

console.log(meta.content); //=> "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA..."
console.log(meta.mimetype); //=> "image/png"
console.log(meta.base64); //=> "iVBORw0KGgoAAAANSUhEUgAA..."
console.log(meta.getCSS()); //=> "\n.case {\n    background-image: url('data:image/png;base64,iVBORw..."
console.log(meta.getCSS('myClass')); //=> "\n.myClass {\n    background-image: url('data:image/png;base64,iVBORw..."

From a Buffer

If you already have a file Buffer, that's the way to go:

const DatauriParser = require('datauri/parser');
const parser = new DatauriParser();

const buffer = fs.readFileSync('./hello');

parser.format('.png', buffer); //=> "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA..."

From a string

const DatauriParser = require('datauri/parser');
const parser = new DatauriParser();

parser.format('.png', 'xkcd'); //=> "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA..."

Contribute

$ npm install

To run test specs

$ npm test

ChangeLog

Requirements

Node.js 10+

Previous Node versions and deprecated features:

Node.js 8 npm install --save datauri@3 docs: https://github.com/data-uri/datauri/blob/v3.0.0/docs/datauri.md

Node.js 4+ npm install --save datauri@2 docs: https://github.com/data-uri/datauri/blob/v2.0.0/docs/datauri.md

License

MIT License

(c) Data-URI.js

(c) Helder Santana