[wp-trac] [WordPress Trac] #12009: Add support for HTML 5 "async" and "defer" attributes

[WordPress Trac]

#12009: Add support for HTML 5 "async" and "defer" attributes
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 Reporter:  Otto42         |       Owner:  azaozz
     Type:  enhancement    |      Status:  reopened
 Priority:  normal         |   Milestone:  Future Release
Component:  Script Loader  |     Version:  4.6
 Severity:  normal         |  Resolution:
 Keywords:                 |     Focuses:
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Comment (by mor10):

 For clarity: We should not blanket `defer` all scripts. A decision as to
 what approach is best (default, `async`, or `defer`) needs to be done on a
 script-by-script basis to optimize performance. The behavior of the two
 options is significantly different and can be taken advantage of in
 different circumstances.

 Separately, just to add more numbers to the convo,  the Can I Use stats on
 support are relevant: https://caniuse.com/#search=http2

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Ticket URL: <https://core.trac.wordpress.org/ticket/12009#comment:48>
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