Alternatives to iframe srcdoc?

Use the new Data URI Scheme. Example:

var content = "<html></html>";
document.getElementById("my_iframe_id").src = "data:text/html;charset=UTF-8," + content;

You can write to the document of an iframe like this:

const html = '<body>foo</body>';
const iframeDocument = document.querySelector('iframe#foo').contentDocument;
const content = `<html>${html} </html>`;
iframeDocument.open('text/html', 'replace');
iframeDocument.write(content);
iframeDocument.close();

As suggested by eicto by comment, jquery could be used to fill an iframe at the ready-event. In order to adjust the height of the iframe to the height of the content some dirty hacks had to be applied, but the code I ended up using is more or less:

HTML

<!-- IMPORTANT! Do not add src or srcdoc -->
<!-- NOTICE!    Add border:none to get a more "seamless" integration -->
<iframe style="border:none" scrolling="no" id="myIframe">
    Iframes not supported on your device
</iframe>

JS

// Wait until iFrame is ready (body is then available)
$('#myIframe').ready(function() {

    var externalHtml = '<p>Hello World!</p>';

    // Find the body of the iframe and set its HTML
    // Add a wrapping div for height hack
    // Set min-width on wrapping div in order to get real height afterwords
    $('#myIframe').contents().find('body')
        .html('<div id="iframeContent" style="min-width:'+$('body').width()+'px">'
            +externalHtml
            +'</div>'
    );

    // Let the CSS load before getting height 
    setTimeout(function() {
        // Set the height of the iframe to the height of the content
         $('#myIframe').css('height', 
             $('#myIframe').contents()
             .find('#iframeContent').height() + 'px' 
         );
    },50);
});

Tags:

Html

Css

Iframe

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