Node.js
Add Image to HTML Email

See more Email Object Examples
Demonstrates how to add an image to an HTML email.
Chilkat Node.js Downloads

Node.js
NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var email = new chilkat.Email();

    email.From = "Matt <matt@example.com>";
    email.AddTo("Joe","joe@example.com");
    email.Subject = "This is a test";

    // Add an HTML body with an image tag.
    var html = "<html><body><p>Test with image:</p><p><img src=\"/wildlife/starfish.jpg\" /></p></body></html>";
    email.SetHtmlBody(html);

    // Add the image data from a file.  The pathInHtml must match the value of the img tag's src attribute.
    var pathInHtml = "/wildlife/starfish.jpg";
    // The actual path of the JPG file in the local filesystem:
    var pathOnDisk = "qa_data/jpg/starfish20.jpg";

    success = email.AddRelatedFile2(pathOnDisk,pathInHtml);
    if (success == false) {
        console.log(email.LastErrorText);
        return;
    }

    // The email is now properly constructed with an image that will be visible in the HTML.
    // In this example, we'll save it to a .eml file and verify by loading the .eml in an email client such as Mozilla Thunderbird.

    success = email.SaveEml("qa_output/starfish.eml");

    // Also, we can examine the MIME to understand how the image data in the MIME is associated with the img tag in the HTML.
    // It is the Content-Location header value that must match the value of the img tag's src attribute.

    console.log(email.GetMime());

    // Here's the MIME:

    // MIME-Version: 1.0
    // Date: Thu, 26 May 2022 11:09:12 -0500
    // Message-ID: <B1D499F74F533E287BFE04BBD79AAF1D973B61E3@SLICE>
    // Content-Type: multipart/related; boundary="------------000205040704010904010706"
    // X-Priority: 3 (Normal)
    // From: Matt <matt@example.com>
    // To: Joe <joe@example.com>
    // Subject: This is a test
    // 
    // --------------000205040704010904010706
    // Content-Type: text/html; charset=us-ascii
    // Content-Transfer-Encoding: 7bit
    // 
    // <html><body><p>Test with image:</p><p><img src="/wildlife/starfish.jpg" /></p></body></html>
    // --------------000205040704010904010706
    // Content-Type: image/jpeg; name="/wildlife/starfish.jpg"
    // Content-Transfer-Encoding: base64
    // Content-Disposition: inline; filename="/wildlife/starfish.jpg"
    // Content-Location: /wildlife/starfish.jpg
    // 
    // /9j/4AAQSkZJRgABAQEASABIAAD//gAmRmlsZSB3cml0dGVuIGJ5IEFkb2JlIFBob3Rvc2hvcD8g
    // NC4w/9sAQwAQCwwODAoQDg0OEhEQExgoGhgWFhgxIyUdKDozPTw5Mzg3QEhcTkBEV0U3OFBtUVdf
    // YmdoZz5NcXlwZHhcZWdj/9sAQwEREhIYFRgvGhovY0I4QmNjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj
    // Y2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj/8IAEQgAFAAUAwERAAIRAQMRAf/EABcAAAMBAAAA
    // AAAAAAAAAAAAAAIDBAX/xAAYAQADAQEAAAAAAAAAAAAAAAABAgMEAP/aAAwDAQACEAMQAAAB2kZY
    // NNEijWKddfTmLgALWH//xAAbEAACAgMBAAAAAAAAAAAAAAABAgMRAAQSE//aAAgBAQABBQL0XqN+
    // pM2aqJGMiqFFCyg7z//EABwRAAICAgMAAAAAAAAAAAAAAAERAAIQIQMSUf/aAAgBAwEBPwHqU5aq
    // Axx+y1tMQl4elj//xAAcEQEAAQUBAQAAAAAAAAAAAAABEQACEBIhA1H/2gAIAQIBAT8B3Bhqy7Zc
    // enyiwmGgDhiOzj//xAAdEAABAwUBAAAAAAAAAAAAAAABAAIREBIhIkFR/9oACAEBAAY/ArZyn+Cg
    // xtxWuJaoCnqDuin/xAAcEAABBAMBAAAAAAAAAAAAAAABABEhYRAxQVH/2gAIAQEAAT8hkEwPUUR9
    // DYfE4nxtRpIkBTsayuALIiuY/9oADAMBAAIAAwAAABDWPTsf/8QAGhEAAwADAQAAAAAAAAAAAAAA
    // AAEREDFBIf/aAAgBAwEBPxC0DVPcWm+Ce4OesrkE6bjH/8QAGBEBAQEBAQAAAAAAAAAAAAAAAREA
    // QRD/2gAIAQIBAT8QahMiOc8YgSrnTY3ELclHXn//xAAcEAEBAAIDAQEAAAAAAAAAAAABEQAhMUFx
    // EFH/2gAIAQEAAT8Qn3igmSZSj+c4N4zapMy9IjFV98wncN2iuLFsCEbDGxQkI6RO/n//2Q==
    // 
    // --------------000205040704010904010706--

}

chilkatExample();