Struct html_tags::Meta

pub struct Meta<'life> {

    pub accesskey: Option<&'life str>,
    pub autocapitalize: Option<&'life str>,
    pub autofocus: Option<bool>,
    pub charset: Option<&'life str>,
    pub class: Option<&'life str>,
    pub content: Option<&'life str>,
    pub contenteditable: Option<&'life str>,
    pub contextmenu: Option<&'life str>,
    pub data: Option<BTreeMap<&'life str, &'life str>>,
    pub dir: Option<&'life str>,
    pub draggable: Option<&'life str>,
    pub enterkeyhint: Option<&'life str>,
    pub exportparts: Option<&'life str>,
    pub hidden: Option<bool>,
    pub http_equiv: Option<&'life str>,
    pub id: Option<&'life str>,
    pub inert: Option<&'life str>,
    pub inputmode: Option<&'life str>,
    pub is: Option<&'life str>,
    pub name: Option<&'life str>,
}

The <meta> HTML element represents metadata that cannot be represented by other HTML meta-related elements, like <base>, <link>, <script>, <style> or <title>.

The type of metadata provided by the <meta> element can be one of the following:

More information: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/meta

Fields

accesskey: Option<&'life str>

Provides a hint for generating a keyboard shortcut for the current element. This attribute consists of a space-separated list of characters. The browser should use the first one that exists on the computer keyboard layout.

autocapitalize: Option<&'life str>

Controls whether and how text input is automatically capitalized as it is entered/edited by the user. It can have the following values:

• off or none, no autocapitalization is applied (all letters default to lowercase)
• on or sentences, the first letter of each sentence defaults to a capital letter; all other letters default to lowercase
• words, the first letter of each word defaults to a capital letter; all other letters default to lowercase
• characters, all letters should default to uppercase

autofocus: Option<bool>

Indicates that an element is to be focused on page load, or as soon as the <dialog> it is part of is displayed. This attribute is a boolean, initially false.

charset: Option<&'life str>

This attribute declares the document's character encoding. If the attribute is present, its value must be an ASCII case-insensitive match for the string "utf-8", because UTF-8 is the only valid encoding for HTML5 documents. <meta> elements which declare a character encoding must be located entirely within the first 1024 bytes of the document.

class: Option<&'life str>

A space-separated list of the classes of the element. Classes allow CSS and JavaScript to select and access specific elements via the class selectors or functions like the method Document.getElementsByClassName().

content: Option<&'life str>

This attribute contains the value for the http-equiv or name attribute, depending on which is used.

contenteditable: Option<&'life str>

An enumerated attribute indicating if the element should be editable by the user. If so, the browser modifies its widget to allow editing. The attribute must take one of the following values:

• true or the empty string, which indicates that the element must be editable;
• false, which indicates that the element must not be editable.

contextmenu: Option<&'life str>

The id of a <menu> to use as the contextual menu for this element.

data: Option<BTreeMap<&'life str, &'life str>>

Forms a class of attributes, called custom data attributes, that allow proprietary information to be exchanged between the HTML and its DOM representation that may be used by scripts. All such custom data are available via the HTMLElement interface of the element the attribute is set on. The HTMLElement.dataset property gives access to them.

dir: Option<&'life str>

An enumerated attribute indicating the directionality of the element's text. It can have the following values:

• ltr, which means left to right and is to be used for languages that are written from the left to the right (like English);
• rtl, which means right to left and is to be used for languages that are written from the right to the left (like Arabic);
• auto, which lets the user agent decide. It uses a basic algorithm as it parses the characters inside the element until it finds a character with a strong directionality, then it applies that directionality to the whole element.

draggable: Option<&'life str>

An enumerated attribute indicating whether the element can be dragged, using the Drag and Drop API. It can have the following values:

• true, which indicates that the element may be dragged
• false, which indicates that the element may not be dragged.

enterkeyhint: Option<&'life str>

Hints what action label (or icon) to present for the enter key on virtual keyboards.

exportparts: Option<&'life str>

Used to transitively export shadow parts from a nested shadow tree into a containing light tree.

hidden: Option<bool>

An enumerated attribute indicating that the element is not yet, or is no longer, relevant. For example, it can be used to hide elements of the page that can't be used until the login process has been completed. The browser won't render such elements. This attribute must not be used to hide content that could legitimately be shown.

http_equiv: Option<&'life str>

Defines a pragma directive. The attribute is named http-equiv(alent) because all the allowed values are names of particular HTTP headers:

• content-security-policy Allows page authors to define a content policy for the current page. Content policies mostly specify allowed server origins and script endpoints which help guard against cross-site scripting attacks.
• content-type Declares the MIME type and the document's character encoding. The content attribute must have the value "text/html; charset=utf-8" if specified. This is equivalent to a <meta> element with the charset attribute specified and carries the same restriction on placement within the document. Note: Can only be used in documents served with a text/html — not in documents served with an XML MIME type.
• default-style Sets the name of the default CSS style sheet set.
• x-ua-compatible If specified, the content attribute must have the value "IE=edge". User agents are required to ignore this pragma.
• refresh This instruction specifies:
  • The number of seconds until the page should be reloaded - only if the content attribute contains a non-negative integer.
  • The number of seconds until the page should redirect to another - only if the content attribute contains a non-negative integer followed by the string ';url=', and a valid URL.

  Warning:

  Pages set with a refresh value run the risk of having the time interval being too short. People navigating with the aid of assistive technology such as a screen reader may be unable to read through and understand the page's content before being automatically redirected. The abrupt, unannounced updating of the page content may also be disorienting for people experiencing low vision conditions.

  • MDN Understanding WCAG, Guideline 2.1 explanations
  • MDN Understanding WCAG, Guideline 3.1 explanations
  • Understanding Success Criterion 2.2.1 | W3C Understanding WCAG 2.0
  • Understanding Success Criterion 2.2.4 | W3C Understanding WCAG 2.0
  • Understanding Success Criterion 3.2.5 | W3C Understanding WCAG 2.0

id: Option<&'life str>

Defines a unique identifier (ID) which must be unique in the whole document. Its purpose is to identify the element when linking (using a fragment identifier), scripting, or styling (with CSS).

inert: Option<&'life str>

A boolean value that makes the browser disregard user input events for the element. Useful when click events are present.

inputmode: Option<&'life str>

Provides a hint to browsers about the type of virtual keyboard configuration to use when editing this element or its contents. Used primarily on <input> elements, but is usable on any element while in contenteditable mode.

is: Option<&'life str>

Allows you to specify that a standard HTML element should behave like a registered custom built-in element (see Using custom elements for more details).

name: Option<&'life str>

The name and content attributes can be used together to provide document metadata in terms of name-value pairs, with the name attribute giving the metadata name, and the content attribute giving the value.

See standard metadata names for details about the set of standard metadata names defined in the HTML specification.

Trait Implementations

impl<'life> Clone for Meta<'life>

fn clone(&self) -> Meta<'life>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'life> Debug for Meta<'life>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'life> Default for Meta<'life>

fn default() -> Meta<'life>

Returns the “default value” for a type.

impl<'life> Ord for Meta<'life>

fn cmp(&self, other: &Meta<'life>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl<'life> PartialEq<Meta<'life>> for Meta<'life>

fn eq(&self, other: &Meta<'life>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'life> PartialOrd<Meta<'life>> for Meta<'life>

fn partial_cmp(&self, other: &Meta<'life>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'life> Eq for Meta<'life>

impl<'life> StructuralEq for Meta<'life>

impl<'life> StructuralPartialEq for Meta<'life>