Rendering Charts in PDFs

import {PdfDocument, WaitForType, CssMediaType} from "@ironsoftware/ironpdf";

(async () => {
    const htmlWithJs = `<!DOCTYPE html>
    <html>
        <head>
            <meta charset='utf-8' />
            <title>C3 Bar Chart</title>
        </head>
        <body>
            <div id='chart' style='width: 950px;'></div>
            <script src='https://d3js.org/d3.v4.js'></script>
            <!-- Load c3.css -->
            <link href='https://cdnjs.cloudflare.com/ajax/libs/c3/0.5.4/c3.css' rel='stylesheet'>
            <!-- Load d3.js and c3.js -->
            <script src='https://cdnjs.cloudflare.com/ajax/libs/c3/0.5.4/c3.js'></script>
            <script>
                Function.prototype.bind = Function.prototype.bind || function (thisp) {
                    var fn = this;
                    return function() {
                        return fn.apply(thisp, arguments);
                    };
                };
                var chart = c3.generate({
                    bindto: '#chart',
                    data: {
                        columns: [
                            ['data1', 30, 200, 100, 400, 150, 250],
                            ['data2', 50, 20, 10, 40, 15, 25]
                        ]
                    }
                });
                // Set delay
                setTimeout(function() {
                    window.ironpdf.notifyRender();
                }, 1000);
            </script>
        </body>
    </html>`;

    // Configure rendering options
    const options = {
        enableJavaScript: true,
        waitFor: {
            type: WaitForType.JavaScript,
            maxWaitTime: 1000, // 1000 milliseconds delay
        },
        cssMediaType: CssMediaType.Screen,
    };

    // Render HTML content to a PDF
    const pdf = await PdfDocument.fromHtml(htmlWithJs, { renderOptions: options })

    await pdf.saveAs("js-chart.pdf");
})();

Rendering Charts in PDFs

When loading charts using JavaScript, it's important to allow sufficient time for JavaScript execution. Below is an example demonstrating how to configure this process:

In the code above, we've enabled JavaScript execution using the enableJavaScript property. The waitFor property is used to delay the rendering process and wait for the JavaScript to execute. This specific configuration, using WaitForType.JavaScript, will wait until the window.ironpdf.notifyRender function is called in the script or until the maximum wait time is reached.

Additionally, the CSS media option will ensure that the view and layout of the HTML content adheres to the screen settings.

Explore our GitHub examples to master rendering JS Charts to PDF with IronPDF for Node.js!