accept

Specifies the types of files that the server accepts for file input.

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accept-charset

Specifies the character encoding used when form data is submitted.

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accesskey

Defines a keyboard shortcut to activate or focus an element.

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action

Specifies the URL to which the form data should be submitted.

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align

Specifies the alignment of an element (deprecated in HTML5; use CSS instead).

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alt

Provides alternative text for an image when it cannot be displayed.

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async

Indicates that the script should be executed asynchronously.

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autocomplete

Specifies whether an input field should have autocomplete enabled or disabled.

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autofocus

Specifies that an element should automatically get focus when the page loads.

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autoplay

Specifies that audio or video should start playing automatically.

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bgcolor

Sets the background color of an element (deprecated in HTML5; use CSS instead).

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border

Specifies the border width around an element (deprecated in HTML5; use CSS instead).

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buffered

Contains the time ranges of the media resource that have been buffered.

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challenge

Specifies the key name of the challenge sent to the server (for `<keygen>`).

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charset

Specifies the character encoding of an external script or resource.

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checked

Specifies that an input element should be pre-selected when the page loads.

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cite

Specifies the source URL of a quote or citation.

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class

Defines one or more class names for an element to be targeted with CSS or JavaScript.

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code

Specifies the computer code within the `<code>` element.

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codebase

Specifies the base URL for the `<object>` element (deprecated in HTML5).

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color

Specifies the text color of an element (deprecated in HTML5; use CSS instead).

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cols

Specifies the visible width of a `<textarea>` element, in columns.

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colspan

Specifies the number of columns a table cell should span.

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content

Provides the value for a meta tag's metadata.

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contenteditable

Specifies whether an element is editable by the user.

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contextmenu

Specifies a context menu for an element.

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controls

Specifies that audio or video should have player controls displayed.

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coords

Defines coordinates for an area element in an image map.

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crossorigin

Specifies how the element should handle cross-origin requests.

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data-*

Allows storing custom data private to the page or application.

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datetime

Specifies date and time information for a specific element.

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default

Specifies that a track should be enabled by default in a `<video>` or `<audio>` element.

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defer

Indicates that the script should be executed after the page has finished parsing.

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dir

Specifies the text direction of the content.

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dirname

Specifies the name of the input field that contains direction information.

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disabled

Specifies that an input element should be disabled.

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download

Specifies that the target should be downloaded when a user clicks on the link.

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draggable

Specifies whether an element is draggable by the user.

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enctype

Specifies the content type of the form data when submitting it to the server.

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for

Associates a `<label>` element with a form control (e.g., `<input>`, `<select>`).

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form

Specifies the form element that an input element belongs to.

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formaction

Specifies the URL to which the form data should be submitted.

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formenctype

Specifies the content type of the form data when submitting it to the server.

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formmethod

Specifies the HTTP method used when submitting a form.

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formnovalidate

Specifies that a form should not be validated upon submission.

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headers

Specifies the header cells a data cell is associated with in a table.

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height

Specifies the height of an element (e.g., `<img>`, `<iframe>`).

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hidden

Specifies that an element is not yet, or is no longer, relevant.

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high

Specifies the upper bound of a gauge or meter element.

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href

Specifies the URL of a hyperlink (e.g., `<a>`, `<link>`).

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hreflang

Specifies the language of the linked document.

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http-equiv

Provides an HTTP header for the information/value of the meta element.

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id

Defines a unique identifier for an element to be targeted with CSS or JavaScript.

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imagesrcset

Specifies multiple sources for an image, allowing responsive image loading.

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inputmode

Specifies the preferred input method for an element.

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integrity

Specifies the integrity checksum of a resource, such as a script or stylesheet.

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intrinsicsize

Specifies the intrinsic size of an image for better loading performance.

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is

Specifies a custom element's tag name in the context of a custom element definition.

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ismap

Specifies that an image is part of a server-side image map.

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itemprop

Specifies the property name for an element in the context of microdata.

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keytype

Specifies the type of cryptographic key used in a `<keygen>` element.

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kind

Specifies the kind of text track in a `<track>` element.

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label

Provides a label or name for an element.

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lang

Specifies the primary language of the content.

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language

Defines the script language for the content in a `<script>` element (deprecated).

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list

Refers to a `<datalist>` element to provide auto-completion options for an `<input>`.

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loop

Specifies that audio or video should loop and play repeatedly.

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low

Specifies the lower bound of a gauge or meter element.

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manifest

Specifies the URL of the cache manifest file.

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max

Specifies the maximum value for an `<input>` element.

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maxlength

Specifies the maximum number of characters allowed in an input field.

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media

Specifies the media query for linked external resources (e.g., `<link>`, `<source>`).

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method

Specifies the HTTP method used when submitting a form (e.g., GET or POST).

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min

Specifies the minimum value for an `<input>` element.

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minlength

Specifies the minimum number of characters required in an input field.

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multiple

Specifies that an input element can accept multiple values.

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muted

Specifies that audio should be muted by default.

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name

Defines a name for an element to be submitted to the server.

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novalidate

Specifies that a form should not be validated upon submission.

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open

Specifies that details of a `<details>` element should be visible by default.

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optimum

Specifies the optimal value of a gauge or meter element.

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pattern

Specifies the regular expression pattern that an `<input>` element's value must match.

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ping

Specifies a list of URLs to be notified when a user follows a hyperlink.

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placeholder

Provides a hint or example text for an input field when it is empty.

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poster

Specifies an image to be shown while a video is downloading or before playback.

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preload

Specifies how a media resource should be preloaded for better performance.

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radiogroup

Specifies the name of the group of radio buttons to which an `<input>` belongs.

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readonly

Specifies that an input field is read-only and cannot be edited.

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rel

Specifies the relationship between the current document and the linked resource.

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required

Specifies that an input field must be filled out before submitting a form.

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reversed

Specifies that the order of a list should be reversed.

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rows

Specifies the visible number of lines in a `<textarea>` element.

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rowspan

Specifies the number of rows a table cell should span.

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sandbox

Specifies restrictions for the content within an `<iframe>` element.

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scope

Specifies the scope of a header cell in a table.

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scoped

Specifies that styles defined within a `<style>` element apply only to the parent document.

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selected

Specifies that an option within a `<select>` element should be pre-selected.

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shape

Specifies the shape of an area element in an image map.

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size

Specifies the width of an `<input>` element (for some input types) or the number of visible options in a `<select>` element.

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sizes

Specifies the size variations for responsive images.

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slot

Specifies the name of the slot that a `<slot>` element is assigned to in a shadow tree.

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span

Specifies the number of columns that a table cell should span.

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spellcheck

Specifies whether an element's spelling and grammar should be checked.

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src

Specifies the URL of a media resource, script, or image.

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srcdoc

Specifies the HTML content of an `<iframe>`.

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srclang

Specifies the language of the text track in a `<track>` element.

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srcset

Specifies multiple sources for an image, allowing responsive image loading.

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start

Specifies the starting value of a numbered list.

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step

Specifies the step value for an `<input>` element with a numeric or range type.

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style

Specifies inline CSS styles for an element.

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tabindex

Specifies the tabbing order of an element within the document.

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target

Specifies where to open linked resources or forms.

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title

Provides additional information about an element, often displayed as a tooltip.

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translate

Specifies whether the content of an element should be translated or not.

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type

Specifies the type of an `<input>` element or the media type of a linked resource.

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typemustmatch

Specifies that the resource specified by `src` must be of the same type as the current document.

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usemap

Specifies an image map to associate with an `<img>` element.

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value

Specifies the initial value of an `<input>` element.

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width

Specifies the width of an element (e.g., `<img>`, `<iframe>`).

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