Create a QR code using JavaScript (Table/canvas)

Because the QR code encoding standards are public and simple, zxing or D-project provides codec libraries in multiple programming environments.

The D-project provides JavaScript scripts. Http://www.d-project.com/qrcode/index.html

A qrcode encoding matrix can be generated based on the input content, version number, and fault tolerance level, and then displayed as a QR code by setting the cell of the table to black or white.

Based on jquery-qrcode, it provides a rendering method other than table: canvas. Http://jeromeetienne.github.com/jquery-qrcode/

After obtaining the matrix of qrcode, you can draw a black box on the canvas to display the QR code. The advantage is that you can easily process the QR code based on canvas.

The following is a simple example: