Package org.apache.juneau.bean.html5

Class Meta

java.lang.Object
org.apache.juneau.bean.html5.HtmlElement
org.apache.juneau.bean.html5.HtmlElementVoid
org.apache.juneau.bean.html5.Meta
@Bean(typeName="meta") public class Meta extends HtmlElementVoid
DTO for an HTML <meta> element.

The meta element represents metadata about the document. It provides information about the document that is not displayed to users but is used by browsers, search engines, and other web services. Common uses include character encoding, viewport settings, SEO information, and social media tags.

Examples:

// Character encoding Meta meta1 = meta().charset("utf-8"); // Viewport for responsive design Meta meta2 = meta() .name("viewport") .content("width=device-width, initial-scale=1.0"); // SEO description Meta meta3 = meta() .name("description") .content("This is a sample web page with meta information"); // Open Graph tags for social media Meta meta4 = meta() .property("og:title") .content("My Web Page"); // HTTP-equiv for cache control Meta meta5 = meta() .httpequiv("Cache-Control") .content("no-cache, no-store, must-revalidate");

The following convenience methods are provided for constructing instances of this bean:

See Also:

  • Constructor Details

    • Meta

      public Meta()
      Creates an empty Meta element.

  • Method Details

    • charset

      public Meta charset(String value)
      charset attribute.

      Specifies the character encoding for the HTML document. Should be placed early in the document head.

      Common values:

      • "UTF-8" - Unicode UTF-8 encoding (recommended)
      • "ISO-8859-1" - Latin-1 encoding
      • "windows-1252" - Windows-1252 encoding
      Parameters:
      charset - The character encoding for the document.
      Returns:
      This object.

    • content

      public Meta content(String value)
      content attribute.

      Specifies the value associated with the name or http-equiv attribute. The content varies depending on the type of metadata being defined.

      Parameters:
      content - The metadata value (e.g., description text, viewport settings, etc.).
      Returns:
      This object.

    • httpequiv

      public Meta httpequiv(String value)
      http-equiv attribute.

      Specifies a pragma directive that simulates an HTTP header. Used with the content attribute.

      Common values:

      • "content-type" - Document content type and character encoding
      • "refresh" - Page refresh or redirect timing
      • "expires" - Document expiration date
      • "cache-control" - Caching directives
      • "pragma" - Cache control (legacy)
      • "set-cookie" - Cookie settings
      • "x-ua-compatible" - Browser compatibility mode
      Parameters:
      httpequiv - The HTTP header name to simulate.
      Returns:
      This object.

    • name

      public Meta name(String value)
      name attribute.

      Specifies the name of the metadata property. Used with the content attribute to define document metadata.

      Common values:

      • "description" - Page description for search engines
      • "keywords" - Keywords for search engines
      • "author" - Page author
      • "viewport" - Viewport settings for mobile devices
      • "robots" - Instructions for search engine crawlers
      Parameters:
      name - The name of the metadata property.
      Returns:
      This object.

    • _class

      public Meta _class(String value)
      Description copied from class: HtmlElement
      class attribute.

      Specifies one or more CSS class names for the element, separated by spaces. These classes can be used for styling and JavaScript selection.

      Overrides:
      _class in class HtmlElementVoid
      Returns:
      This object.

    • accesskey

      public Meta accesskey(String value)
      Description copied from class: HtmlElement
      accesskey attribute.

      Defines a keyboard shortcut to activate or focus an element. The value should be a single character that, when pressed with a modifier key (usually Alt), activates the element.

      Overrides:
      accesskey in class HtmlElementVoid
      Returns:
      This object.

    • contenteditable

      public Meta contenteditable(Object value)
      Description copied from class: HtmlElement
      contenteditable attribute.

      Indicates whether the element's content is editable by the user.

      Possible values:

      • "true" or empty string - Element content is editable
      • "false" - Element content is not editable
      • "plaintext-only" - Element content is editable, but rich text formatting is disabled
      Overrides:
      contenteditable in class HtmlElementVoid
      Returns:
      This object.

    • dir

      public Meta dir(String value)
      Description copied from class: HtmlElement
      dir attribute.

      Specifies the text direction of the element's content.

      Possible values:

      • "ltr" - Left-to-right text direction
      • "rtl" - Right-to-left text direction
      • "auto" - Browser determines direction based on content
      Overrides:
      dir in class HtmlElementVoid
      Returns:
      This object.

    • hidden

      public Meta hidden(Object value)
      Description copied from class: HtmlElement
      hidden attribute.

      This attribute uses deminimized values:

      • false - Attribute is not added
      • true - Attribute is added as "hidden"
      • Other values - Passed through as-is
      Overrides:
      hidden in class HtmlElementVoid
      Returns:
      This object.

    • id

      public Meta id(String value)
      Description copied from class: HtmlElement
      id attribute.

      Specifies a unique identifier for the element. The ID must be unique within the document and can be used for CSS styling, JavaScript selection, and anchor links.

      Overrides:
      id in class HtmlElementVoid
      Returns:
      This object.

    • lang

      public Meta lang(String value)
      Description copied from class: HtmlElement
      lang attribute.

      Specifies the primary language of the element's content using a language tag. This helps with accessibility, search engines, and browser features like spell checking.

      Overrides:
      lang in class HtmlElementVoid
      Returns:
      This object.

    • onabort

      public Meta onabort(String value)
      Description copied from class: HtmlElement
      onabort attribute.

      Event handler for when an operation is aborted (e.g., image loading is cancelled).

      Overrides:
      onabort in class HtmlElementVoid
      Returns:
      This object.

    • onblur

      public Meta onblur(String value)
      Description copied from class: HtmlElement
      onblur attribute.

      Event handler for when the element loses focus.

      Note:

      If your HTML serializer is configured to use single quotes for attribute values, you should use double quotes in your JavaScript code, and vice versa. Otherwise, the quotes will be converted to HTML entities. For example:

      • If using single quotes for attributes: onblur("validate(\"email\")")
      • If using double quotes for attributes: onblur("validate('email')")
      Overrides:
      onblur in class HtmlElementVoid
      Returns:
      This object.

    • oncancel

      public Meta oncancel(String value)
      Description copied from class: HtmlElement
      oncancel attribute.

      Event handler for when a dialog is cancelled.

      Overrides:
      oncancel in class HtmlElementVoid
      Returns:
      This object.

    • oncanplay

      public Meta oncanplay(String value)
      Description copied from class: HtmlElement
      oncanplay attribute.

      Event handler for when the media can start playing (enough data has been buffered).

      Overrides:
      oncanplay in class HtmlElementVoid
      Returns:
      This object.

    • oncanplaythrough

      public Meta oncanplaythrough(String value)
      Description copied from class: HtmlElement
      oncanplaythrough attribute.

      Event handler for when the media can play through to the end without buffering.

      Overrides:
      oncanplaythrough in class HtmlElementVoid
      Returns:
      This object.

    • onchange

      public Meta onchange(String value)
      Description copied from class: HtmlElement
      onchange attribute.

      Event handler for when the value of a form element changes and loses focus.

      Note:

      If your HTML serializer is configured to use single quotes for attribute values, you should use double quotes in your JavaScript code, and vice versa. Otherwise, the quotes will be converted to HTML entities. For example:

      • If using single quotes for attributes: onchange("validate(\"field\")")
      • If using double quotes for attributes: onchange("validate('field')")
      Overrides:
      onchange in class HtmlElementVoid
      Returns:
      This object.

    • onclick

      public Meta onclick(String value)
      Description copied from class: HtmlElement
      onclick attribute.

      Event handler for when the element is clicked.

      Note:

      If your HTML serializer is configured to use single quotes for attribute values, you should use double quotes in your JavaScript code, and vice versa. Otherwise, the quotes will be converted to HTML entities. For example:

      • If using single quotes for attributes: onclick("alert(\"Hello\")")
      • If using double quotes for attributes: onclick("alert('Hello')")
      Overrides:
      onclick in class HtmlElementVoid
      Returns:
      This object.

    • oncuechange

      public Meta oncuechange(String value)
      Description copied from class: HtmlElement
      oncuechange attribute.

      Event handler for when a text track cue changes.

      Overrides:
      oncuechange in class HtmlElementVoid
      Returns:
      This object.

    • ondblclick

      public Meta ondblclick(String value)
      Description copied from class: HtmlElement
      ondblclick attribute.

      Event handler for when the element is double-clicked.

      Overrides:
      ondblclick in class HtmlElementVoid
      Returns:
      This object.

    • ondurationchange

      public Meta ondurationchange(String value)
      Description copied from class: HtmlElement
      ondurationchange attribute.

      Event handler for when the duration of the media changes.

      Overrides:
      ondurationchange in class HtmlElementVoid
      Returns:
      This object.

    • onemptied

      public Meta onemptied(String value)
      Description copied from class: HtmlElement
      onemptied attribute.

      Event handler for when the media element becomes empty (e.g., network error).

      Overrides:
      onemptied in class HtmlElementVoid
      Returns:
      This object.

    • onended

      public Meta onended(String value)
      Description copied from class: HtmlElement
      onended attribute.

      Event handler for when the media playback reaches the end.

      Overrides:
      onended in class HtmlElementVoid
      Returns:
      This object.

    • onerror

      public Meta onerror(String value)
      Description copied from class: HtmlElement
      onerror attribute.

      Event handler for when an error occurs (e.g., failed resource loading).

      Overrides:
      onerror in class HtmlElementVoid
      Returns:
      This object.

    • onfocus

      public Meta onfocus(String value)
      Description copied from class: HtmlElement
      onfocus attribute.

      Event handler for when the element receives focus.

      Note:

      If your HTML serializer is configured to use single quotes for attribute values, you should use double quotes in your JavaScript code, and vice versa. Otherwise, the quotes will be converted to HTML entities. For example:

      • If using single quotes for attributes: onfocus("highlight(\"field\")")
      • If using double quotes for attributes: onfocus("highlight('field')")
      Overrides:
      onfocus in class HtmlElementVoid
      Returns:
      This object.

    • oninput

      public Meta oninput(String value)
      Description copied from class: HtmlElement
      oninput attribute.

      Event handler for when the value of an input element changes (fires on every keystroke).

      Overrides:
      oninput in class HtmlElementVoid
      Returns:
      This object.

    • oninvalid

      public Meta oninvalid(String value)
      Description copied from class: HtmlElement
      oninvalid attribute.

      Event handler for when form validation fails.

      Overrides:
      oninvalid in class HtmlElementVoid
      Returns:
      This object.

    • onkeydown

      public Meta onkeydown(String value)
      Description copied from class: HtmlElement
      onkeydown attribute.

      Event handler for when a key is pressed down.

      Overrides:
      onkeydown in class HtmlElementVoid
      Returns:
      This object.

    • onkeypress

      public Meta onkeypress(String value)
      Description copied from class: HtmlElement
      onkeypress attribute.

      Event handler for when a key is pressed (deprecated, use onkeydown instead).

      Overrides:
      onkeypress in class HtmlElementVoid
      Returns:
      This object.

    • onkeyup

      public Meta onkeyup(String value)
      Description copied from class: HtmlElement
      onkeyup attribute.

      Event handler for when a key is released.

      Overrides:
      onkeyup in class HtmlElementVoid
      Returns:
      This object.

    • onload

      public Meta onload(String value)
      Description copied from class: HtmlElement
      onload attribute.

      Event handler for when the element and its resources have finished loading.

      Note:

      If your HTML serializer is configured to use single quotes for attribute values, you should use double quotes in your JavaScript code, and vice versa. Otherwise, the quotes will be converted to HTML entities. For example:

      • If using single quotes for attributes: onload("init(\"config\")")
      • If using double quotes for attributes: onload("init('config')")
      Overrides:
      onload in class HtmlElementVoid
      Returns:
      This object.

    • onloadeddata

      public Meta onloadeddata(String value)
      Description copied from class: HtmlElement
      onloadeddata attribute.

      Event handler for when the first frame of media has finished loading.

      Overrides:
      onloadeddata in class HtmlElementVoid
      Returns:
      This object.

    • onloadedmetadata

      public Meta onloadedmetadata(String value)
      Description copied from class: HtmlElement
      onloadedmetadata attribute.

      Event handler for when metadata (duration, dimensions, etc.) has been loaded.

      Overrides:
      onloadedmetadata in class HtmlElementVoid
      Returns:
      This object.

    • onloadstart

      public Meta onloadstart(String value)
      Description copied from class: HtmlElement
      onloadstart attribute.

      Event handler for when the browser starts loading the media.

      Overrides:
      onloadstart in class HtmlElementVoid
      Returns:
      This object.

    • onmousedown

      public Meta onmousedown(String value)
      Description copied from class: HtmlElement
      onmousedown attribute.

      Event handler for when a mouse button is pressed down on the element.

      Overrides:
      onmousedown in class HtmlElementVoid
      Returns:
      This object.

    • onmouseenter

      public Meta onmouseenter(String value)
      Description copied from class: HtmlElement
      onmouseenter attribute.

      Event handler for when the mouse pointer enters the element (does not bubble).

      Overrides:
      onmouseenter in class HtmlElementVoid
      Returns:
      This object.

    • onmouseleave

      public Meta onmouseleave(String value)
      Description copied from class: HtmlElement
      onmouseleave attribute.

      Event handler for when the mouse pointer leaves the element (does not bubble).

      Overrides:
      onmouseleave in class HtmlElementVoid
      Returns:
      This object.

    • onmousemove

      public Meta onmousemove(String value)
      Description copied from class: HtmlElement
      onmousemove attribute.

      Event handler for when the mouse pointer moves over the element.

      Overrides:
      onmousemove in class HtmlElementVoid
      Returns:
      This object.

    • onmouseout

      public Meta onmouseout(String value)
      Description copied from class: HtmlElement
      onmouseout attribute.

      Event handler for when the mouse pointer moves out of the element (bubbles).

      Overrides:
      onmouseout in class HtmlElementVoid
      Returns:
      This object.

    • onmouseover

      public Meta onmouseover(String value)
      Description copied from class: HtmlElement
      onmouseover attribute.

      Event handler for when the mouse pointer moves over the element (bubbles).

      Note:

      If your HTML serializer is configured to use single quotes for attribute values, you should use double quotes in your JavaScript code, and vice versa. Otherwise, the quotes will be converted to HTML entities. For example:

      • If using single quotes for attributes: onmouseover("showTooltip(\"info\")")
      • If using double quotes for attributes: onmouseover("showTooltip('info')")
      Overrides:
      onmouseover in class HtmlElementVoid
      Returns:
      This object.

    • onmouseup

      public Meta onmouseup(String value)
      Description copied from class: HtmlElement
      onmouseup attribute.

      Event handler for when a mouse button is released over the element.

      Overrides:
      onmouseup in class HtmlElementVoid
      Returns:
      This object.

    • onmousewheel

      public Meta onmousewheel(String value)
      Description copied from class: HtmlElement
      onmousewheel attribute.

      Event handler for when the mouse wheel is rotated over the element (deprecated, use onwheel).

      Overrides:
      onmousewheel in class HtmlElementVoid
      Returns:
      This object.

    • onpause

      public Meta onpause(String value)
      Description copied from class: HtmlElement
      onpause attribute.

      Event handler for when media playback is paused.

      Overrides:
      onpause in class HtmlElementVoid
      Returns:
      This object.

    • onplay

      public Meta onplay(String value)
      Description copied from class: HtmlElement
      onplay attribute.

      Event handler for when media playback starts.

      Overrides:
      onplay in class HtmlElementVoid
      Returns:
      This object.

    • onplaying

      public Meta onplaying(String value)
      Description copied from class: HtmlElement
      onplaying attribute.

      Event handler for when media playback starts after being paused or delayed.

      Overrides:
      onplaying in class HtmlElementVoid
      Returns:
      This object.

    • onprogress

      public Meta onprogress(String value)
      Description copied from class: HtmlElement
      onprogress attribute.

      Event handler for when the browser is downloading media data.

      Overrides:
      onprogress in class HtmlElementVoid
      Returns:
      This object.

    • onratechange

      public Meta onratechange(String value)
      Description copied from class: HtmlElement
      onratechange attribute.

      Event handler for when the playback rate of media changes.

      Overrides:
      onratechange in class HtmlElementVoid
      Returns:
      This object.

    • onreset

      public Meta onreset(String value)
      Description copied from class: HtmlElement
      onreset attribute.

      Event handler for when a form is reset.

      Overrides:
      onreset in class HtmlElementVoid
      Returns:
      This object.

    • onresize

      public Meta onresize(String value)
      Description copied from class: HtmlElement
      onresize attribute.

      Event handler for when the element is resized.

      Overrides:
      onresize in class HtmlElementVoid
      Returns:
      This object.

    • onscroll

      public Meta onscroll(String value)
      Description copied from class: HtmlElement
      onscroll attribute.

      Event handler for when the element's scrollbar is scrolled.

      Overrides:
      onscroll in class HtmlElementVoid
      Returns:
      This object.

    • onseeked

      public Meta onseeked(String value)
      Description copied from class: HtmlElement
      onseeked attribute.

      Event handler for when a seek operation completes.

      Overrides:
      onseeked in class HtmlElementVoid
      Returns:
      This object.

    • onseeking

      public Meta onseeking(String value)
      Description copied from class: HtmlElement
      onseeking attribute.

      Event handler for when a seek operation begins.

      Overrides:
      onseeking in class HtmlElementVoid
      Returns:
      This object.

    • onselect

      public Meta onselect(String value)
      Description copied from class: HtmlElement
      onselect attribute.

      Event handler for when text is selected in the element.

      Overrides:
      onselect in class HtmlElementVoid
      Returns:
      This object.

    • onshow

      public Meta onshow(String value)
      Description copied from class: HtmlElement
      onshow attribute.

      Event handler for when a context menu is shown.

      Overrides:
      onshow in class HtmlElementVoid
      Returns:
      This object.

    • onstalled

      public Meta onstalled(String value)
      Description copied from class: HtmlElement
      onstalled attribute.

      Event handler for when media loading is stalled.

      Overrides:
      onstalled in class HtmlElementVoid
      Returns:
      This object.

    • onsubmit

      public Meta onsubmit(String value)
      Description copied from class: HtmlElement
      onsubmit attribute.

      Event handler for when a form is submitted.

      Note:

      If your HTML serializer is configured to use single quotes for attribute values, you should use double quotes in your JavaScript code, and vice versa. Otherwise, the quotes will be converted to HTML entities. For example:

      • If using single quotes for attributes: onsubmit("return validate(\"form\")")
      • If using double quotes for attributes: onsubmit("return validate('form')")
      Overrides:
      onsubmit in class HtmlElementVoid
      Returns:
      This object.

    • onsuspend

      public Meta onsuspend(String value)
      Description copied from class: HtmlElement
      onsuspend attribute.

      Event handler for when media loading is suspended.

      Overrides:
      onsuspend in class HtmlElementVoid
      Returns:
      This object.

    • ontimeupdate

      public Meta ontimeupdate(String value)
      Description copied from class: HtmlElement
      ontimeupdate attribute.

      Event handler for when the current playback position changes.

      Overrides:
      ontimeupdate in class HtmlElementVoid
      Returns:
      This object.

    • ontoggle

      public Meta ontoggle(String value)
      Description copied from class: HtmlElement
      ontoggle attribute.

      Event handler for when a details element is opened or closed.

      Overrides:
      ontoggle in class HtmlElementVoid
      Returns:
      This object.

    • onvolumechange

      public Meta onvolumechange(String value)
      Description copied from class: HtmlElement
      onvolumechange attribute.

      Event handler for when the volume of media changes.

      Overrides:
      onvolumechange in class HtmlElementVoid
      Returns:
      This object.

    • onwaiting

      public Meta onwaiting(String value)
      Description copied from class: HtmlElement
      onwaiting attribute.

      Event handler for when media playback stops to buffer more data.

      Overrides:
      onwaiting in class HtmlElementVoid
      Returns:
      This object.

    • spellcheck

      public Meta spellcheck(Object value)
      Description copied from class: HtmlElement
      spellcheck attribute.

      Indicates whether the element should have its spelling and grammar checked.

      Possible values:

      • "true" - Enable spell checking for this element
      • "false" - Disable spell checking for this element
      Overrides:
      spellcheck in class HtmlElementVoid
      Returns:
      This object.

    • style

      public Meta style(String value)
      Description copied from class: HtmlElement
      style attribute.

      Specifies inline CSS styles for the element. The value should be valid CSS property-value pairs separated by semicolons.

      Overrides:
      style in class HtmlElementVoid
      Returns:
      This object.

    • tabindex

      public Meta tabindex(Object value)
      Description copied from class: HtmlElement
      tabindex attribute.

      Specifies the tab order of the element when navigating with the keyboard.

      Possible values:

      • Positive integer - Element is focusable and participates in tab order
      • "0" - Element is focusable but not in tab order
      • Negative integer - Element is not focusable
      Overrides:
      tabindex in class HtmlElementVoid
      Returns:
      This object.

    • title

      public Meta title(String value)
      Description copied from class: HtmlElement
      title attribute.

      Specifies additional information about the element, typically displayed as a tooltip when the user hovers over the element.

      Overrides:
      title in class HtmlElementVoid
      Returns:
      This object.

    • translate

      public Meta translate(Object value)
      Description copied from class: HtmlElement
      translate attribute.

      Specifies whether the element's content should be translated when the page is localized.

      Possible values:

      • "yes" - Content should be translated (default)
      • "no" - Content should not be translated
      Overrides:
      translate in class HtmlElementVoid
      Returns:
      This object.