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GHC 10.0.0.20260917 · lts/ghc-10.0.x · 2b27632 · 2026-10-31

value(!?) :: Attributable h => h -> (Bool, Attribute) -> h

Shorthand for setting an attribute depending on a conditional.

Example:

p !? (isBig, A.class "big") $ "Hello"

Gives the same result as:

(if isBig then p ! A.class "big" else p) "Hello"
valuecontents :: MarkupM a -> MarkupM a

Take only the text content of an HTML tree.

contents $ do
    p ! $ "Hello "
    p ! $ "Word!"

Result:

Hello World!
valuecustomAttribute
  1. :: Tag

    Name of the attribute

  2. -> AttributeValue

    Value for the attribute

  3. -> Attribute

    Resulting HTML attribtue

Create a custom attribute. This is not specified in the HTML spec, but some JavaScript libraries rely on it.

An example:

<select dojoType="select">foo</select>

Can be produced using:

select ! customAttribute "dojoType" "select" $ "foo"
valuedataAttribute
  1. :: Tag

    Name of the attribute.

  2. -> AttributeValue

    Value for the attribute.

  3. -> Attribute

    Resulting HTML attribute.

From HTML 5 onwards, the user is able to specify custom data attributes.

An example:

<p data-foo="bar">Hello.</p>

We support this in BlazeMarkup using this function. The above fragment could be described using BlazeMarkup with:

p ! dataAttribute "foo" "bar" $ "Hello."
valuetext
  1. :: Text

    Text to render.

  2. -> Markup

    Resulting HTML fragment.

Render text. Functions like these can be used to supply content in HTML.

classclass ToMarkup a where

Class allowing us to use a single function for Markup values

Methods

Instances19ToMarkup, …
classclass ToValue a where

Class allowing us to use a single function for attribute values

Methods

Instances17ToValue, …
method(!) :: h -> Attribute -> h

Apply an attribute to an element.

Example:

img ! src "foo.png"

Result:

<img src="foo.png" />

This can be used on nested elements as well.

Example:

p ! style "float: right" $ "Hello!"

Result:

<p style="float: right">Hello!</p>
newtypenewtype Tag

Type for an HTML tag. This can be seen as an internal string type used by BlazeMarkup.

Instances1IsString
  • IsString TagDefined in blaze-markup-0.8.3.0 · Text.Blaze.Internal