Which is the difference between srcdoc=“…” and src=“data:text/html,…” in an <iframe>?

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不要未来只要你来 2020-12-04 16:33
For example, which is the difference between these:
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                <span>(楼主)</span>
            
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                <span>2020-12-04 16:43</span>
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<p>From MDN :</p>

<blockquote>
  <p><sup>1.</sup> The content of the page that the embedded context is to contain. This
  attribute is expected to be used together with the sandbox and
  seamless attributes. If a browser supports the srcdoc attribute, it
  will override the content specified in the src attribute (if present).
  If a browser does NOT support the srcdoc attribute, it will show the
  file specified in the src attribute instead (if present).</p>
</blockquote>

<p>So, the <code>srcdoc</code> attribute overrides the content embedded using <code>src</code> attribute.</p>

<p>Demo</p>

<hr>

<p>Also, what you are saying about the following snippet <code>data:text/html</code> is called Data URI and it has limitations..</p>

<blockquote>
  <p><sup>2.</sup> Data URIs cannot be larger than 32,768 characters.</p>
</blockquote>

<p><sup>
1. MDN, 2. MSDN
</sup></p>
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