How to print pdf.js document?

I’ve generated a document with pdf.js and it shows correctly. I’don’t have print button. How to add the button to allow users to print it ? I was using Chrome.

Answer

Try using the javascript-function window.print();, which opens the print-dialog.

You will have to add an button to your html, which triggers the command – its not possible within the pdf.

For this reason, you will need an iFrame, and use something like this:

function printIt() {
    var wnd = window.open('http://your-pdf-url');
    wnd.print();
}

<input type="button" value="Print" onclick=printIt()>

window.print() wouldn’t work, because it would also print the surrounding html.

EDIT:

From your comment, I now know, that you want to print the content of a canvas-element – which is much easier.

You don’t need an iframe, you can put the button on the same page, and use window.print();.

In order to only print the canvas-element, and to hide the surroundings (like the button), you can use css-Syntax like this:

@media print
{    
    .no-print, .no-print *
    {
        display: none !important;
    }
}

@media print specifies css-code, which only applies for a webpage, if it gets printed. If you now asign the class .no-print to everything except the canvas-element, only your pdf will be printed.

You can also use this css-code, if it’s easier:

@media print
{    
    *
    {
        display: none;
    }
    canvas 
    {
        display: inline;
    }
}