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kjua-svg

Dynamically generated QR codes for modern browsers.
Uses kjua and QR Code Generator (MIT).

If you are looking for a solutions to generate QR Codes with Angular, you can look into ngx-kjua.

Demo

Click here

Usage

  const code = kjua(options);
  document.getElementById("container").appendChild(code);

Options

Crisp

As you can set the size of the image, the amount of 'modules' (black/white boxes that make up the QR-code) is calculated based on the size and the amount of quiet modules. The calculation can result in an odd number so that a module is e.g. 4.5 pixels big. The resulting image will be drawn fuzzy if crisp is set to false. Setting it to true will result in 'sharp' lines.

crisp false

crisp true

Label

Kjua lets you embed a text or image to the code. This can be set with the setting mode. This can reduce the readability of the code!

Image

Image as Code

Labelimage and Imagelabel

Use this, if you want a label AND an image. In these modes mSize, mPosX and mPosY can be provided as an array. In mode labelimage, the first value (index 0) of the mSize, mPosX and mPosY arrays is used for the label, the second value (index 1) is used for image and vice versa. Also in labelimage mode, the label is drawn before the image is drawn and therefore kinda "in the background" if the two overlap.

All options

• text encoded content (defaults to ``)
• render render-mode: 'image', 'canvas', 'svg' (defaults to image)
• crisp render pixel-perfect lines (defaults to true)
• minVersion minimum version: 1..40 (defaults to 1)
• ecLevel error correction level: 'L', 'M', 'Q' or 'H' (defaults to L)
• size size in pixel (defaults to 200)
• fill code color (defaults to #333)
• back background color (defaults to #fff, for transparent use '' or null)
• rounded roundend corners in pc: 0..100 (defaults to 0, not working if renderis set to svg)
• quiet quiet zone in modules (defaults to 0)
• mode modes: 'plain', 'label', 'image', 'imagelabel' or 'labelimage' (defaults to plain, set label or image property if you change this)
• mSize label/image size in pc: 0..100 (defaults to 30) or a number-array if mode is 'imagelabel' or 'labelimage'
• mPosX label/image pos x in pc: 0..100 (defaults to 50) or a number-array if mode is 'imagelabel' or 'labelimage'
• mPosY label/image pos y in pc: 0..100 (defaults to 50) or a number-array if mode is 'imagelabel' or 'labelimage'
• label additional label text (defaults to ``)
• fontname font for additional label text (defaults to sans-serif)
• fontcolor font-color for additional label text (defaults to #333)
• fontoutline draw an outline on the label text in the color of the back (defaults to true)
• image additional image (defaults to undefined, use an HTMLImageElement or base64-string)
• imageAsCode draw the image as part of the code (defaults to false)

More details can be found on larsjung.de/kjua

Differences to kjua

• ~~possibility to render QR-codes as SVG~~
• image can be provided as base64-string
• draw the image as part of the code --> imageAsCode
• new modes: labelimage and imagelabel
• Typescript-types