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Editorial Team
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Asked: 2026-05-27T23:39:16+00:00

Is there a way to do the following in JavaScript? get a div by

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Is there a way to do the following in JavaScript?

  1. get a div by a class name,
  2. get the iframe inside the div
  3. and add an attribute (frameborder = 0) 
<html>
    <body>
        <div class="calendar">
            <iframe></iframe>
        </div>
    </body>
</html>
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1 Answer

  1. Editorial Team

    To get a div by class name:

    var allDivs = document.getElementsByClassName("calendar");

    Assuming there’s only one

    var calendarDiv = document.getElementsByClassName("calendar")[0];

    Get the iFrame inside:

    var iFrame = calendarDiv.getElementsByTagName("iframe")[0];

    set an attribute:

    iFrame.setAttribute("frameborder", "0");

    Or, since getElementsByClassName isn’t supported in old versions of IE, consider setting the id on the iFrame and simply doing:

    document.getElementById("iFrameId").setAttribute("frameborder", "0");
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