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( function() {

var func = function() {

var iframe_form = document.getElementById(‘wpcom-iframe-form-0228caabb2e2ee7e1ba78675907c165c-563233865505b’);

var iframe = document.getElementById(‘wpcom-iframe-0228caabb2e2ee7e1ba78675907c165c-563233865505b’);

if ( iframe_form && iframe ) {

iframe_form.submit();

iframe.onload = function() {

iframe.contentWindow.postMessage( {

‘msg_type’: ‘poll_size’,

‘frame_id’: ‘wpcom-iframe-0228caabb2e2ee7e1ba78675907c165c-563233865505b’

}, window.location.protocol + ‘//wpcomwidgets.com’ );

}

}

// Autosize iframe

var funcSizeResponse = function( e ) {

var origin = document.createElement( ‘a’ );

origin.href = e.origin;

// Verify message origin

if ( ‘wpcomwidgets.com’ !== origin.host )

return;

// Verify message is in a format we expect

if ( ‘object’ !== typeof e.data || undefined === e.data.msg_type )

return;

switch ( e.data.msg_type ) {

case ‘poll_size:response’:

var iframe = document.getElementById( e.data._request.frame_id );

if ( iframe && ” === iframe.width )

iframe.width = ‘100%’;

if ( iframe && ” === iframe.height )

iframe.height = parseInt( e.data.height );

return;

default:

return;

}

}

if ( ‘function’ === typeof window.addEventListener ) {

window.addEventListener( ‘message’, funcSizeResponse, false );

} else if ( ‘function’ === typeof window.attachEvent ) {

window.attachEvent( ‘onmessage’, funcSizeResponse );

}

}

if (document.readyState === ‘complete’) { func.apply(); /* compat for infinite scroll */ }

else if ( document.addEventListener ) { document.addEventListener( ‘DOMContentLoaded’, func, false ); }

else if ( document.attachEvent ) { document.attachEvent( ‘onreadystatechange’, func ); }

} )();

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