Add a psuedo-class CSS definietion to this element. A new class name is auto-generated and used to prefix name, name must start with the : character. Returns the generated class name.

style.addPseudoClass(":hover", "background: #eee")

classes

Str[] : classes

The CSS classes for this element.

clear

This clear()

Clear all style declarations.

computed

Obj? computed(Str name)

Get the computed property value.

effective

Obj? effective(Str name)

Get the effetive style property value, which is the most specific style or CSS rule in effect on this node. Returns null if no rule in effect for given property.

This method is restricted to stylesheets that have originated from the same domain as the document. Any rules that may be applied from an external sheet will not be included.

get

@Operator
Obj? get(Str name)

Get the given property value.

color := style["color"]

hasClass

Bool hasClass(Str name)

Return true if this element has the given CSS class name, or false if it does not.

removeClass

This removeClass(Str name)

Remove the given CSS class name to this element. If this element does not have the given class name, this method does nothing. Returns this.

set

@Operator
This set(Str name, Obj? val)

Set the given propery value. If val is null this property is removed.

style["color"] = "#f00"

setAll

This setAll(Str:Obj? map)

Set all the given property values.

style.setAll(["color":"#f00", "font-weight":"bold"])

setCss

This setCss(Str css)

Set properties via CSS text.

style.setCss("color: #f00; font-weight: bold;")

toggleClass

This toggleClass(Str name, Bool? cond)

Toggle the presence of the given CSS class name based on the cond argument:

null: remove class if present, or add if missing
true: always add class (see addClass)
false: always remove class(see removeClass)

trap

virtual Obj? trap(Str name, Obj?[]? args)

Get or set an attribute. Attribute names should be specifed in camel case:

style->backgroundColor == style["background-color"]

Haxall 4.0.5 ∙ 24-Feb-2026 14:33 EST