The list of HTML changes% with% stop 5.1 is a bit extensive, but it is documented, including showing the compatibility between browsers for each new implementation. You can see the complete list here: link
The List is divided into 3 parts. Changed Resources , Removed Resources and Deployment Resources .
ThisisjustacoupleoftheDocumentedChanges,Seetherestofthelink: link
InterestingHTML5.2news
Anewwaytodobusiness:OfallthenewfeaturesimplementedwiththenewHTMLversion,theintroductionofthe5.2elementisbyfarthemostinteresting.
<dialog>
PaymentsAPIsin<dialog><h2>Cabeçalhodomodal</h2><p>Conteúdodomodal,podendoincluirtexto,imagens,links,vídeosetc.</p></dialog>
Stylesinthebodyofthepage:Althoughstyledefinitionsareusuallyenteredinthedocuments,HTML5.2makesitpossibletodefinestyleswithinthe<main>elementaswell,althoughW3Citselfrecommendpractice.
iframes
Headersincaptions:FromHTML5.2,headers(<body>to<body><pclass="azul">Texto azul!</p>
<style>
.azul { color: #0000FF; }
</style>
</body> ) can be entered into <h1> elements of forms.
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What becomes obsolete or invalid with HTML 5.2
The <h6> element previously used to generate public keys in forms has been removed from the specifications.
The elements <legend> and <keygen> are no longer part of the HTML specifications. They were used until then for creating navigation menus or context.
From now on, the <menu> element can only contain <menuitem> elements as valid children. That is, elements of types <p> , inline or inline-block can no longer be nested inside a inline-table element in a semantically valid way.
Exited HTML 5.2
The elements block , <p> and <keygen> .
Attribute inputmode for elements <menu> and attributes of <menuitem> .
Method <text> .
The Plugin API has been marked as deprecated .
The following constructs are now valid in HTML 5.2:
Use of the dropzone element within the showModalDialog element.
Multiple elements <style> no <body> , as long as only one is visible to the user.
Possible to have a <main> element as the child of a DOM element.
Headers within an element <div> in a <dl> >.
Source 1:
Source 2: link
Version 5.1: This is the list of implementations of <legend> link
Version 5.3 Draft : List of drafts of <fieldset link
