We're trying to resize "amp-ad" on the fly but the iframe containing the ads is displayed in 1x1 instead of 300x250
We do use "amp-ad" with "generic" creative (setup with size 1x1 as it is described here http://prebid.org/overview/how-to-simplify-line-item-setup.html) but despite the amp-ad has height and width "300x250", the ads is rendered in 1x1!
<!doctype html>
<html ⚡ lang="en">
<head>
<meta charset="utf-8">
<title>AMP Ads</title>
<link rel="canonical" href="https://www.toto.com/solar.html"/>
<meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">
<script async src="https://cdn.ampproject.org/v0.js"></script>
<script custom-element="amp-ad" src="https://cdn.ampproject.org/v0/amp-ad-latest.js"></script>
<script async custom-element="amp-iframe" src="https://cdn.ampproject.org/v0/amp-iframe-latest.js"></script>
<script async custom-element="amp-sticky-ad" src="https://cdn.ampproject.org/v0/amp-sticky-ad-latest.js"></script>
<script async custom-element="amp-analytics" src="https://cdn.ampproject.org/v0/amp-analytics-0.1.js"></script>
</head>
<body style="padding:10px">
<amp-ad width="300" height="250"
type="doubleclick"
data-slot="my-data-slot"
rtc-config='{
"vendors": {
"my-vendor": {"additional-infos":"111"}
}, "timeoutMillis": 999}'
json='{"targeting":{"test": "test"}}'
>
<div placeholder><div style="text-align: center; font-size: smaller; color: gray;">No ads for the moment....</div></div>
</amp-ad>
<amp-sticky-ad layout="nodisplay">
<amp-ad width="320" height="50"
type="doubleclick"
data-slot="my-data-slot"
rtc-config='{
"vendors": {
"my-vendor": {"additional-infos":"111"}
}, "timeoutMillis": 999}'
json='{"targeting":{"test": "test"}}'
>
<div placeholder><div style="text-align: center; font-size: smaller; color: gray;">No ads for the moment....</div></div>
</amp-ad>
</amp-sticky-ad>
our creative setup in DFP is size 1x1 but associated to a lineitem with 300x250
We did also use amp-embed instead of the amp-ad, and the ads has been successfully resized in 300x250! We understood amp-ad and amp-embed are just aliases of the same thing, but it looks like the 2 are behaving differently!
Unfortunately, the amp-embed does not work in the amp-sticky, so we need to make the ads resized using the amp-ad tag.
In the DFP creative, we tried to use:
window.context.requestResize: but the window.context is undefined! If somebody knows what's missing to get a working window.context, that would probably solve our issue!
postMessage but it did not work
window.parent.postMessage({
sentinel: 'amp',
type: 'embed-size',
width: 300,
height: 250}, '*');
Check if you are not running your creatives in a SafeFrame, try to turn it off.
Also, you should probably refer to
window.parent.context.requestResize, notwindow.context.requestResize, as far as I know DFP would render creatives only in an iframe - your code runs there, and that frame does not havewindow.context. However, it's parent frame should have it, because it is the actual amp-ad frame.