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Custom Elements

Custom elements is a feature that, until recently, was developed as monkeypatches onto various specifications. To help implementers have a consolidated view of how custom elements change the HTML Standard, we have a few resources.

First we have this listing of affected sections:

• Elements in the DOM:
  • The HTMLElement constructor
  • The definition of "element interface"
• Custom elements
• Window got a new customElements attribute
• Creating and inserting nodes: create an element for a token
• The XHTML syntax now mentions that "creat an element for a token" must be used.

Also, here is a listing of all relevant commits:

• https://github.com/whatwg/html/commit/6e7eaa4bd2912965fd83766f99f984f249531f3a
• https://github.com/whatwg/html/commit/785863622acc5cc9faf1ff392ae17786ee7b3b80
• https://github.com/whatwg/html/commit/1d596a555d3c2f067ae643e447eaa88137b595ac

You may also be interested in similar information for changes to the DOM Standard.