HTML 5.2 W3C Recommendation

Key Points:

Payment Request API
allowpaymentrequest
Presentation API
allowpresentation
iframe


Ref:
https://www.w3.org/TR/2017/REC-html52-20171214/index.html
https://www.infoq.com/news/2017/12/html-5-2-recommendation
http://www.infoq.com/cn/news/2018/01/html-5-2-recommendation
https://jakearchibald.com/2017/es-modules-in-browsers/

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