HTMLElement

The base interface for every HTML element. A tag with no more specific interface below is a plain HTMLElement. Extends Element.

Reflected properties

All setters are guarded and throw NoModificationAllowedError on a read-only document.

Property	Attribute	Type	Notes
`dir`	`dir`	enum	Keywords: `ltr` · `rtl` · `auto`. Missing or invalid → `""`.
`inputMode`	`inputmode`	enum	Keywords: `none` · `text` · `tel` · `url` · `email` · `numeric` · `decimal` · `search`. Missing or invalid → `""`.
`enterKeyHint`	`enterkeyhint`	enum	Keywords: `enter` · `done` · `go` · `next` · `previous` · `search` · `send`. Missing or invalid → `""`.
`autocapitalize`	`autocapitalize`	enum	Keywords: `""` · `off` · `none` · `on` · `sentences` · `words` · `characters`. `off`→`none` and `on`→`sentences` are synonyms; missing or present-empty → `""`; any other invalid value → `"sentences"` (the WHATWG Sentences default, matching Chrome).
`contentEditable`	`contenteditable`	string, read/write (bespoke accessor)	Getter returns `"true"` / `"false"` / `"plaintext-only"` / `"inherit"` (missing or invalid → `"inherit"`, present-empty → `"true"`). Setter accepts only those four keywords case-insensitively — `"inherit"` removes the attribute, any other value throws `SyntaxError`.
`isContentEditable`	(computed)	boolean, read-only	Walks ancestors: the nearest ancestor (inclusive) with a defined `contentEditable` state of `true`/`plaintext-only` → editable; `false` → not editable; none found → `false`.