class dom::Elem

sys::Obj
  dom::Elem

@Js

Source

Elem models a DOM element object.

See pod doc for details.

add

@Operator
virtual This add(Elem child)

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Add a new element as a child to this element. Return this.

addAll

This addAll(Elem[] elems)

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Add all elements to this element. Returns this.

animateStart

Void animateStart(KeyFrames frames, [Str:Obj]? opts, Duration dur)

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Start an animation on this element using the given key frames.

frames := KeyFrames([
  KeyFrame("0%",   ["transform": "scale(1)"]),
  KeyFrame("50%",  ["transform": "scale(1.1)"]),
  KeyFrame("100%", ["transform": "scale(1)"]),
])

animate(frames, null, 5sec)
animate(frames, ["animation-iteration-count":"infinite"], 1sec)
animateStop

Void animateStop()

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Stop the current animation on this element, or do nothing if no animation in progress.

attr

Str? attr(Str name)

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Get the given HTML attribute value for this element. Returns null if attribute not defined.

attrs

Str:Str attrs()

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Get name:value map of all attributes.

blur

virtual Void blur()

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Remove focus from this elem.

children

Elem[] children()

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Get the child nodes of this element.

clone

Elem clone(Bool deep := true)

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Return a duplicate of this node.

containsChild

Bool containsChild(Elem elem)

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Return true if given element is a descendant of this node, or false if not.

enabled

virtual Bool? enabled

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The enabled attribute for this element, or null if one not applicable. This is typically only valid for form elements.

firstChild

Elem? firstChild()

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Get the first child node of this element, or null if this element has no children.

focus

virtual Void focus()

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Request keyboard focus on this elem.

fromNative

const static Elem fromNative(Obj elem)

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Create a Elem instance from a native JavaScript DOM object.

get

@Operator
Obj? get(Str name)

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Convenience for attr.

hasChildren

Bool hasChildren()

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Return true if children is non-zero, false otherwise.

hasFocus

virtual Bool hasFocus()

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Return true if this elem has focus.

html

Str html

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The HTML markup contained in this element.

id

Str? id

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The id for this element. Returns null if id is not defined.

insertBefore

virtual This insertBefore(Elem child, Elem ref)

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Insert a new element as a child to this element before the specified reference element. The reference element must be a child of this element. Returns this.

invoke

Obj? invoke(Str name, Obj?[]? args := null)

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Invoke the given native DOM function with optional arguments.

lastChild

Elem? lastChild()

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Get the last child node of this element, or null if this element has no children.

make

new make(Str tagName := "div", Uri? ns := null)

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Create a new Elem in the current Doc. Optionally a namespace can be specified with ns.

nextSibling

Elem? nextSibling()

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Get the next sibling to this element, or null if this is the last element under its parent.

ns

Uri ns()

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The namespace URI of this element.

onEvent

Func onEvent(Str type, Bool useCapture, |Event| handler)

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Attach an event handler for the given event on this element. Returns callback function instance.

pagePos

Point pagePos()

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Position of element relative to the whole document.

parent

Elem? parent()

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Get the parent Elem of this element, or null if this element has no parent.

pos

Point pos

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Position of element relative to its parent in pixels.

prevSibling

Elem? prevSibling()

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Get the previous sibling to this element, or null if this is the first element under its parent.

prop

Obj? prop(Str name)

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Get the given DOM property value for this element. Returns null if property does not exist.

querySelector

Elem? querySelector(Str selectors)

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Returns the first element that is a descendant of this element on which it is invoked that matches the specified group of selectors.

querySelectorAll

Elem[] querySelectorAll(Str selectors)

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Returns a list of all elements descended from this element on which it is invoked that match the specified group of CSS selectors.

relPos

Point relPos(Point p)

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Given a page position, return p relative to this element.

remove

virtual This remove(Elem child)

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Remove a child element from this element. Return this.

removeAll

This removeAll()

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Remove all children from this element. Returns this.

removeAttr

This removeAttr(Str name)

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Remove the given HTML attribute from this element.

removeEvent

Void removeEvent(Str type, Bool useCapture, Func handler)

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Remove the given event handler from this element. If this handler was not registered, this method does nothing.

replace

virtual This replace(Elem oldChild, Elem newChild)

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Replace existing child node with a new child. Returns this.

scrollPos

Point scrollPos

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Top left scroll position of element.

scrollSize

Size scrollSize()

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Scrollable size of element.

set

@Operator
Void set(Str name, Str? val)

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Conveneince for setAttr.

setAttr

This setAttr(Str name, Str? val, Uri? ns := null)

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Set the given HTML attribute value for this element. If val is null the attribute is removed (see removeAttr). Optionally a namespace can be specified with ns.

setProp

This setProp(Str name, Obj? val)

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Set the given DOM properity value for this element.

size

Size size

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Size of element in pixels.

style

Style style()

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Get the Style instance for this element.

tagName

Str tagName()

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Get the tag name for this element.

text

Str text

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Text content contained in this element.

transition

Void transition(Str:Obj props, [Str:Obj]? opts, Duration dur, |Elem|? onComplete := null)

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Transition a set of CSS properties.

transition(["opacity": "0.5"], null, 1sec) { echo("done!") }
transition(["opacity": "0.5"], ["transition-delay": 500ms], 1sec) { echo("done!") }
trap

virtual override Obj? trap(Str name, Obj?[]? args := null)

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The trap operator will behave slightly differently based on the namespace of the element.

For HTML elements, trap works as a convenience for prop and setProp:

div := Elem("div")
div->tabIndex = 0   // equivalent to div.setProp("tabIndex", 0)

For SVG elements (where ns is `http://www.w3.org/2000/svg`), trap routes to attr and setAttr:

svg := Svg.line(0, 0, 10, 10)
svg->x1 = 5      // equivalent to svg.setAttr("x1", "5")
svg->y1 = 5      // equivalent to svg.setAttr("y1", "5")
svg->x2 == "10"  // equivalent to svg.attr("x2")