The IAB Flex Ad SDK is a drop-in script helper to facilitate testing of flex ads in your existing content pages. One of the purposes of the new Flex Ad format is to have pre-defined aspect ratio placements in the content prior to arrival of the ad unit. In this manner the page does not exhibit the page stutter.

<script src="../src/js/iab-flex-ad-tester.js" type="text/javascript"></script>
<script>
(function(){
	iab.flexAds.setup({
		controls: true,
		unitsVisible: true,
		slots: [
			{ "selector" : "#top_billboard_wrap", 
				"key": "topBillboard", 
				"adtype": "flex", 
				"size": "8x1" }
		]
	});
})()
</script>

This page uses the above initialization to define flex ad placements on the page. Style has been added to make the ad slots visible.

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