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Editorial Team
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Asked: 2026-06-01T23:31:35+00:00

I have a JavaScript function that does a combination of AJAX and string manipulation

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I have a JavaScript function that does a combination of AJAX and string manipulation to produce a full HTML page as a string. I.e.:

var markup='<html><body>Hello world!</body></html>';

That is very simplified and I cannot guarantee that the HTML structure is predictable. How can I display that content on the page? I think an iframe makes the most sense since string contains a full HTML page but I don’t know how to inject the markup into the iframe.

I don’t want to create another physical file just to use as a “proxy” so I am hoping for a solution that can be encompassed entirely in one HTML page.

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1 Answer

  1. Editorial Team
    var iframe = document.createElement("iframe");
var doc = iframe.contentDocument; // a about:blank
doc.open();
doc.write(htmlstring);
doc.close();

    works for me. I also did use <object>s with a data-uri in their data attribute, e.g. to display xml documents:

    var object = document.createElement("object");
object.setAttribute('data', "data:text/xml, "+xmlstring);

    You also can use a <object data="about:blank"> instead of the iframe to get a contentDocument to overwrite.

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