QR Code Encoder
A lightweight library generating stylish QR codes that also support gradient fills and rounded corners in only 12.2kB minified (4.75kB gzipped). Try out the demo!
This library is a trimmed down version of Lars Jung's jQuery.qrcode library. Our library is however not based on jQuery anymore and doesnt make use of it. Lars Jung's library itself is based on this QR code Generator.
All parts are licensed under the MIT License.
To install via npm:
npm install --save qr-creator
To install via yarn:
yarn add qr-creator
Or simply copy
qr-creator.min.js over to your project.
Call the QrCreator API with a configuration object and a DOM element or canvas to render the QR code into:
|text||String||""||Any kind of text, also links, email addresses, any thing. The library will figure out the size of the QR code to fit all the text inside.|
|radius||0 .. 0.5||0.5||Defines how round the blocks should be. Numbers from 0 (squares) to 0.5 (maximum round) are supported.|
|ecLevel||L, M, Q, H||L||Means "Error correction levels". The four values L, M, Q, and H will use %7, 15%, 25%, and 30% of the QR code for error correction respectively. So on one hand the code will get bigger but chances are also higher that it will be read without errors later on.|
|fill||color or gradient||#000000||What color you want your QR code to be. Use the demo to try different colors.|
|background||color code||null||The background color or null for transparent background.|
|size||int||200||The total size of the final QR code in pixels - it will be a square.|
If you want to fill the QR code with a gradient, use the following format:
type: 'radial-gradient' // or 'linear-gradient'position: ...colorStops:offset0 color0offset1 color1...
Where the position is specified as in createLinearGradient / createRadialGradient. However, each value is relative to the QR code size, i.e. will be multiplied by that size to yield the absolute position.
Trimmed down to be low weight
The goal of the library is to generate QR codes only. For that reason we have removed all additional code such as GIF image generation, background image support, rendering a label on top, removed some dead code, and freed it from depending on jQuery. Also, the resulting library does not use any global variables, is all strict mode, and relies on modern browser standards instead.
|Lines of code||2332||1556 (-33%)|
To install the dependencies run:
and then to build the project:
npm run build