PDF.js with text selection

render.js

// Taken from https://stackoverflow.com/questions/33063213/pdf-js-with-text-selection
PDFJS.getDocument('file.pdf').then(function(pdf){
    var page_num = 1;
    pdf.getPage(page_num).then(function(page){
        var scale = 1.5;
        var viewport = page.getViewport(scale);
        var canvas = $('#the-canvas')[0];
        var context = canvas.getContext('2d');
        canvas.height = viewport.height;
        canvas.width = viewport.width;

        var canvasOffset = $(canvas).offset();
        var $textLayerDiv = $('#text-layer').css({
            height : viewport.height+'px',
            width : viewport.width+'px',
            top : canvasOffset.top,
            left : canvasOffset.left
        });

        page.render({
            canvasContext : context,
            viewport : viewport
        });

        page.getTextContent().then(function(textContent){
           console.log( textContent );
            var textLayer = new TextLayerBuilder({
                textLayerDiv : $textLayerDiv.get(0),
                pageIndex : page_num - 1,
                viewport : viewport
            });

            textLayer.setTextContent(textContent);
            textLayer.render();
        });
    });
});