function ready()

in public/Duo-Web-v2.js [471:531]
43 lines of code
14 McCabe index (conditional complexity)

    function ready(promptElement, iframeAttributes) {
        if (!host) {
            host = getDataAttribute(promptElement, 'host');

            if (!host) {
                throwError(
                    'No API hostname is given for Duo to use.  Be sure to pass ' +
                    'a `host` parameter to Duo.init, or through the `data-host` ' +
                    'attribute on the iframe element.'
                );
            }
        }

        if (!duoSig || !appSig) {
            parseSigRequest(getDataAttribute(promptElement, 'sigRequest'));

            if (!duoSig || !appSig) {
                throwError(
                    'No valid signed request is given.  Be sure to give the ' +
                    '`sig_request` parameter to Duo.init, or use the ' +
                    '`data-sig-request` attribute on the iframe element.'
                );
            }
        }

        // if postAction/Argument are defaults, see if they are specified
        // as data attributes on the iframe
        if (postAction === '') {
            postAction = getDataAttribute(promptElement, 'postAction') || postAction;
        }

        if (postArgument === 'sig_response') {
            postArgument = getDataAttribute(promptElement, 'postArgument') || postArgument;
        }

        if (isIframe(promptElement)) {
            iframe = promptElement;
            iframe.src = generateIframeSrc();
        } else {
            // If given a container to put an iframe in, clean out any children
            // child elements in case `init()` was called more than once.
            while (promptElement.firstChild) {
                // We call `removeChild()` instead of doing `innerHTML = ""`
                // to make sure we unbind any events.
                promptElement.removeChild(promptElement.firstChild)
            }

            iframe = document.createElement('iframe');

            // Set the src and all other attributes on the new iframe.
            iframeAttributes['src'] = generateIframeSrc();
            for (var name in iframeAttributes) {
                iframe.setAttribute(name, iframeAttributes[name]);
            }

            promptElement.appendChild(iframe);
        }

        // listen for the 'message' event
        onMessage(onReceivedMessage);
    }