Regarding the writeBarcode API, how to specify width and height? The sizeHint parameter doesn't seem to work.

[xiaoqiaotq]

[Sec-ant]

For bitmaps (.png), a general way to specify accurate pixels for barcode generation is not possible, because each block or bar in a barcode has to follow certain spec to be distinguishable for it to be decoded. For vector images (.svg), there's no point specifiying dimensions where it can be scaled easily as you wish.

You can use CSS style or post process the image with canvas API or other tools to transform it, depending on how you'd use it.