There is a schema how it works, when it has each attribute
but how it would work with both? Both because instagram generates like that for embeds
<script async defer src="//platform.instagram.com/en_US/embeds.js"></script>
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Roar
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It does *not* work. – Bergi Jul 01 '16 at 09:59
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@Bergi why does facebook generate lake this? – Roar Jul 01 '16 at 15:06
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As the answer to the duplicate says, for "*legacy Web browsers that only support defer (and not async) to fall back*" – Bergi Jul 01 '16 at 15:18
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https://stackoverflow.com/a/68929270/7186739 – Billu Oct 21 '21 at 18:10