goog.dom.DomHelper

Provided By	`goog.dom.DomHelper`

Alias for getElement.

Deprecated	Use `goog.dom.DomHelper.prototype.getElement` instead.

Parameters

`element`	`(string\|Element\|null)`
	Element ID or a DOM node.

Returns

(Element|null)

The element with the given ID, or the node passed in.

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Alias for getElementsByTagNameAndClass.

Deprecated	Use DomHelper getElementsByTagNameAndClass.

Parameters

`opt_tag`	`(string\|goog.dom.TagName<(T\|null)>\|null)=`
	Element tag name.
`opt_class`	`(string\|null)=`
	Optional class name.
`opt_el`	`(Element\|null)=`
	Optional element to look in.

Returns

IArrayLike<(R|null)>

Array-like list of elements (only a length property and numerical indices are guaranteed to exist). The members of the array are {!Element} if opt_tag is a string or more specific types if it is a member of goog.dom.TagName (e.g. {!HTMLAnchorElement} for goog.dom.TagName.A).

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Alias for createDom.

Deprecated	Use `goog.dom.DomHelper.prototype.createDom` instead.

Parameters

`tagName`	`(string\|goog.dom.TagName<(T\|null)>)`
	Tag to create.
`opt_attributes`	`(Object\|string\|null)=`
	If object, then a map of name-value pairs for attributes. If a string, then this is the className of the new element. If an array, the elements will be joined together as the className of the new element.
`var_args`	`...(Object\|string\|null\|undefined)`
	Further DOM nodes or strings for text nodes. If one of the var_args is an array, its children will be added as childNodes instead.

Returns

R

Reference to a DOM node. The return type is {!Element} if tagName is a string or a more specific type if it is a member of goog.dom.TagName (e.g. {!HTMLAnchorElement} for goog.dom.TagName.A).

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Appends a node with text or other nodes.

Parameters

`parent`	`Node`
	The node to append nodes to.
`var_args`	`...(Object\|string\|null)`
	The things to append to the node. If this is a Node it is appended as is. If this is a string then a text node is appended. If this is an array like object then fields 0 to length - 1 are appended.

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Appends a child to a node.

Parameters

`parent`	`(Node\|null)`
	Parent.
`child`	`(Node\|null)`
	Child.

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Determines if the given node can contain children, intended to be used for HTML generation.

Parameters

`node`	`(Node\|null)`
	The node to check.

Returns

boolean

Whether the node can contain children.

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Compares the document order of two nodes, returning 0 if they are the same node, a negative number if node1 is before node2, and a positive number if node2 is before node1. Note that we compare the order the tags appear in the document so in the tree text the B node is considered to be before the I node.

Parameters

`node1`	`(Node\|null)`
	The first node to compare.
`node2`	`(Node\|null)`
	The second node to compare.

Returns

number

0 if the nodes are the same node, a negative number if node1 is before node2, and a positive number if node2 is before node1.

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Whether a node contains another node.

Parameters

`parent`	`(Node\|null)`
	The node that should contain the other node.
`descendant`	`(Node\|null)`
	The node to test presence of.

Returns

boolean

Whether the parent node contains the descendant node.

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Replaces child nodes of target with child nodes of source. This is roughly equivalent to target.innerHTML = source.innerHTML which is not compatible with Trusted Types.

Parameters

`target`	`(Node\|null)`
	Node to clean and replace its children.
`source`	`(Node\|null)`
	Node to get the children from. The nodes will be cloned so they will stay in source.

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Returns a dom node with a set of attributes. This function accepts varargs for subsequent nodes to be added. Subsequent nodes will be added to the first node as childNodes.

So: createDom(goog.dom.TagName.DIV, null, createDom(goog.dom.TagName.P), createDom(goog.dom.TagName.P)); would return a div with two child paragraphs

An easy way to move all child nodes of an existing element to a new parent element is: createDom(goog.dom.TagName.DIV, null, oldElement.childNodes); which will remove all child nodes from the old element and add them as child nodes of the new DIV.

Parameters

`tagName`	`(string\|goog.dom.TagName<(T\|null)>)`
	Tag to create.
`opt_attributes`	`(Object\|string\|null)=`
	If object, then a map of name-value pairs for attributes. If a string, then this is the className of the new element. If an array, the elements will be joined together as the className of the new element.
`var_args`	`...(Object\|string\|null\|undefined)`
	Further DOM nodes or strings for text nodes. If one of the var_args is an array or NodeList, its elements will be added as childNodes instead.

Returns

R

Reference to a DOM node. The return type is {!Element} if tagName is a string or a more specific type if it is a member of goog.dom.TagName (e.g. {!HTMLAnchorElement} for goog.dom.TagName.A).

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Creates a new element.

Parameters

`name`	`(string\|goog.dom.TagName<(T\|null)>)`
	Tag to create.

Returns

R

The new element. The return type is {!Element} if name is a string or a more specific type if it is a member of goog.dom.TagName (e.g. {!HTMLAnchorElement} for goog.dom.TagName.A).

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Create a table.

Parameters

`rows`	`number`
	The number of rows in the table. Must be >= 1.
`columns`	`number`
	The number of columns in the table. Must be >= 1.
`opt_fillWithNbsp`	`boolean=`
	If true, fills table entries with `goog.string.Unicode.NBSP` characters.

Returns

HTMLElement

The created table.

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Creates a new text node.

Parameters

`content`	`(number\|string)`
	Content.

Returns

Text

The new text node.

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Find the deepest common ancestor of the given nodes.

Parameters

`var_args`	`...(Node\|null)`
	The nodes to find a common ancestor of.

Returns

(Node|null)

The common ancestor of the nodes, or null if there is none. null will only be returned if two or more of the nodes are from different documents.

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Finds the first descendant node that matches the filter function. This does a depth first search.

Parameters

`root`	`(Node\|null)`
	The root of the tree to search.
`p`	`function((Node\|null)): boolean`
	The filter function.

Returns

(Node|null|undefined)

The found node or undefined if none is found.

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Finds all the descendant nodes that matches the filter function. This does a depth first search.

Parameters

`root`	`(Node\|null)`
	The root of the tree to search.
`p`	`function((Node\|null)): boolean`
	The filter function.

Returns

(Array<(Node|null)>|null)

The found nodes or an empty array if none are found.

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Flattens an element. That is, removes it and replace it with its children.

Parameters

`element`	`(Element\|null)`
	The element to flatten.

Returns

(Element|null|undefined)

The original element, detached from the document tree, sans children, or undefined if the element was already not in the document.

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Determines the active element in the given document.

Parameters

`opt_doc`	`(Document\|null)=`
	The document to look in.

Returns

(Element|null)

The active element.

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Walks up the DOM hierarchy returning the first ancestor that passes the matcher function.

Parameters

`element`	`(Node\|null)`
	The DOM node to start with.
`matcher`	`function((Node\|null)): boolean`
	A function that returns true if the passed node matches the desired criteria.
`opt_includeNode`	`boolean=`
	If true, the node itself is included in the search (the first call to the matcher will pass startElement as the node to test).
`opt_maxSearchSteps`	`number=`
	Maximum number of levels to search up the dom.

Returns

(Node|null)

DOM node that matched the matcher, or null if there was no match.

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Walks up the DOM hierarchy returning the first ancestor that has the passed class name. If the passed element matches the specified criteria, the element itself is returned.

Parameters

`element`	`(Node\|null)`
	The DOM node to start with.
`class`	`string`
	The class name to match.
`opt_maxSearchSteps`	`number=`
	Maximum number of levels to search up the dom.

Returns

(Element|null)

The first ancestor that matches the passed criteria, or null if none match.

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Walks up the DOM hierarchy returning the first ancestor that has the passed tag name and/or class name. If the passed element matches the specified criteria, the element itself is returned.

Parameters

`element`	`(Node\|null)`
	The DOM node to start with.
`opt_tag`	`(goog.dom.TagName<(T\|null)>\|string\|null)=`
	The tag name to match (or null/undefined to match only based on class name).
`opt_class`	`(string\|null)=`
	The class name to match (or null/undefined to match only based on tag name).
`opt_maxSearchSteps`	`number=`
	Maximum number of levels to search up the dom.

Returns

The first ancestor that matches the passed criteria, or null if no match is found. The return type is {?Element} if opt_tag is not a member of goog.dom.TagName or a more specific type if it is (e.g. {?HTMLAnchorElement} for goog.dom.TagName.A).

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Gets '2d' context of a canvas. Shortcut for canvas.getContext('2d') with a type information.

Parameters

`canvas`	`HTMLCanvasElement`

Returns

CanvasRenderingContext2D

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Returns an array containing just the element children of the given element.

Parameters

`element`	`(Element\|null)`
	The element whose element children we want.

Returns

(Array<Element>|NodeList<Element>)

An array or array-like list of just the element children of the given element.

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Gets the document object being used by the dom library.

Parameters

None.

Returns

Document

Document object.

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Calculates the height of the document.

Parameters

None.

Returns

number

The height of the document.

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Gets the document scroll distance as a coordinate object.

Parameters

None.

Returns

goog.math.Coordinate

Object with properties 'x' and 'y'.

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Gets the document scroll element.

Parameters

None.

Returns

Element

Scrolling element.

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Gets the dom helper object for the document where the element resides.

Parameters

`opt_node`	`(Node\|null)=`
	If present, gets the DomHelper for this node.

Returns

goog.dom.DomHelper

The DomHelper.

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Alias for getElementById. If a DOM node is passed in then we just return that.

Parameters

`element`	`(string\|Element\|null)`
	Element ID or a DOM node.

Returns

(Element|null)

The element with the given ID, or the node passed in.

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Returns the first element we find matching the provided class name.

Parameters

`className`	`string`
	the name of the class to look for.
`opt_el`	`(Element\|Document\|null)=`
	Optional element to look in.

Returns

(Element|null)

The first item found with the class name provided.

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Gets the first element matching the tag and the class.

Parameters

`opt_tag`	`(string\|goog.dom.TagName<(T\|null)>\|null)=`
	Element tag name.
`opt_class`	`(string\|null)=`
	Optional class name.
`opt_el`	`(Document\|Element\|null)=`
	Optional element to look in.

Returns

Reference to a DOM node. The return type is {?Element} if tagName is a string or a more specific type if it is a member of goog.dom.TagName (e.g. {?HTMLAnchorElement} for goog.dom.TagName.A).

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Returns an array of all the elements with the provided className.

Parameters

`className`	`string`
	the name of the class to look for.
`opt_el`	`(Element\|Document\|null)=`
	Optional element to look in.

Returns

IArrayLike<Element>

The items found with the class name provided.

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Gets elements by tag name.

Parameters

`tagName`	`goog.dom.TagName<(T\|null)>`

`opt_parent`	`(Document\|Element)=`
	Parent element or document where to look for elements. Defaults to document of this DomHelper.

Returns

NodeList<(R|null)>

List of elements. The members of the list are {!Element} if tagName is not a member of goog.dom.TagName or more specific types if it is (e.g. {!HTMLAnchorElement} for goog.dom.TagName.A).

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Looks up elements by both tag and class name, using browser native functions (querySelectorAll, getElementsByTagName or getElementsByClassName) where possible. The returned array is a live NodeList or a static list depending on the code path taken.

Parameters

`opt_tag`	`(string\|goog.dom.TagName<(T\|null)>\|null)=`
	Element tag name or * for all tags.
`opt_class`	`(string\|null)=`
	Optional class name.
`opt_el`	`(Document\|Element\|null)=`
	Optional element to look in.

Returns

IArrayLike<(R|null)>

Array-like list of elements (only a length property and numerical indices are guaranteed to exist). The members of the array are {!Element} if opt_tag is not a member of goog.dom.TagName or more specific types if it is (e.g. {!HTMLAnchorElement} for goog.dom.TagName.A).

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Returns the first child node that is an element.

Parameters

`node`	`(Node\|null)`
	The node to get the first child element of.

Returns

(Element|null)

The first child node of node that is an element.

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Cross browser function for getting the document element of an iframe.

Parameters

`iframe`	`(Element\|null)`
	Iframe element.

Returns

Document

The frame content document.

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Cross browser function for getting the window of a frame or iframe.

Parameters

`frame`	`(Element\|null)`
	Frame element.

Returns

(Window|null)

The window associated with the given frame.

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Returns the last child node that is an element.

Parameters

`node`	`(Node\|null)`
	The node to get the last child element of.

Returns

(Element|null)

The last child node of node that is an element.

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Returns the first next sibling that is an element.

Parameters

`node`	`(Node\|null)`
	The node to get the next sibling element of.

Returns

(Element|null)

The next sibling of node that is an element.

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Returns the next node in source order from the given node.

Parameters

`node`	`(Node\|null)`
	The node.

Returns

(Node|null)

The next node in the DOM tree, or null if this was the last node.

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Returns the node at a given offset in a parent node. If an object is provided for the optional third parameter, the node and the remainder of the offset will stored as properties of this object.

Parameters

`parent`	`(Node\|null)`
	The parent node.
`offset`	`number`
	The offset into the parent node.
`opt_result`	`(Object\|null)=`
	Object to be used to store the return value. The return value will be stored in the form {node: Node, remainder: number} if this object is provided.

Returns

(Node|null)

The node at the given offset.

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Returns the text length of the text contained in a node, without markup. This is equivalent to the selection length if the node was selected, or the number of cursor movements to traverse the node. Images & BRs take one space. New lines are ignored.

Parameters

`node`	`(Node\|null)`
	The node whose text content length is being calculated.

Returns

number

The length of node's text content.

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Returns the text offset of a node relative to one of its ancestors. The text length is the same as the length calculated by goog.dom.getNodeTextLength.

Parameters

`node`	`(Node\|null)`
	The node whose offset is being calculated.
`opt_offsetParent`	`(Node\|null)=`
	Defaults to the node's owner document's body.

Returns

number

The text offset.

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Gets the outerHTML of a node, which islike innerHTML, except that it actually contains the HTML of the node itself.

Parameters

`element`	`(Element\|null)`
	The element to get the HTML of.

Returns

string

The outerHTML of the given element.

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Returns the owner document for a node.

Parameters

`node`	`(Node\|null)`
	The node to get the document for.

Returns

Document

The document owning the node.

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Returns an element's parent, if it's an Element.

Parameters

`element`	`(Element\|null)`
	The DOM element.

Returns

(Element|null)

The parent, or null if not an Element.

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Returns the first previous sibling that is an element.

Parameters

`node`	`(Node\|null)`
	The node to get the previous sibling element of.

Returns

(Element|null)

The first previous sibling of node that is an element.

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Returns the previous node in source order from the given node.

Parameters

`node`	`(Node\|null)`
	The node.

Returns

(Node|null)

The previous node in the DOM tree, or null if this was the first node.

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Gets an element by id, asserting that the element is found.

This is used when an element is expected to exist, and should fail with an assertion error if it does not (if assertions are enabled).

Parameters

`id`	`string`
	Element ID.

Returns

Element

The element with the given ID, if it exists.

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Ensures an element with the given className exists, and then returns the first element with the provided className.

Parameters

`className`	`string`
	the name of the class to look for.
`opt_root`	`(Element\|Document)=`
	Optional element or document to look in.

Returns

Element

The first item found with the class name provided.

Throws

{goog.asserts.AssertionError} Thrown if no element is found.

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Returns the text contents of the current node, without markup. New lines are stripped and whitespace is collapsed, such that each character would be visible.

In browsers that support it, innerText is used. Other browsers attempt to simulate it via node traversal. Line breaks are canonicalized in IE.

Parameters

`node`	`(Node\|null)`
	The node from which we are getting content.

Returns

string

The text content.

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Gets the dimensions of the viewport.

Parameters

`opt_window`	`(Window\|null)=`
	Optional window element to test. Defaults to the window of the Dom Helper.

Returns

goog.math.Size

Object with values 'width' and 'height'.

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Gets the window object associated with the document.

Parameters

None.

Returns

Window

The window associated with the given document.

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Insert a child at a given index. If index is larger than the number of child nodes that the parent currently has, the node is inserted as the last child node.

Parameters

`parent`	`(Element\|null)`
	The element into which to insert the child.
`child`	`(Node\|null)`
	The element to insert.
`index`	`number`
	The index at which to insert the new child node. Must not be negative.

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Inserts a new node after an existing reference node (i.e., as the next sibling). If the reference node has no parent, then does nothing.

Parameters

`newNode`	`(Node\|null)`
	Node to insert.
`refNode`	`(Node\|null)`
	Reference node to insert after.

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Inserts a new node before an existing reference node (i.e., as the previous sibling). If the reference node has no parent, then does nothing.

Parameters

`newNode`	`(Node\|null)`
	Node to insert.
`refNode`	`(Node\|null)`
	Reference node to insert before.

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Returns true if the browser is in "CSS1-compatible" (standards-compliant) mode, false otherwise.

Parameters

None.

Returns

boolean

True if in CSS1-compatible mode.

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Whether the object looks like an Element.

Parameters

`obj`	`?`
	The object being tested for Element likeness.

Returns

boolean

Whether the object looks like an Element.

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Returns true if the element can be focused, i.e. it has a tab index that allows it to receive keyboard focus (tabIndex >= 0), or it is an element that natively supports keyboard focus.

Parameters

`element`	`Element`
	Element to check.

Returns

boolean

Whether the element allows keyboard focus.

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Returns true if the element has a tab index that allows it to receive keyboard focus (tabIndex >= 0), false otherwise. Note that some elements natively support keyboard focus, even if they have no tab index.

Parameters

`element`	`Element`
	Element to check.

Returns

boolean

Whether the element has a tab index that allows keyboard focus.

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Whether the object looks like a DOM node.

Parameters

`obj`	`?`
	The object being tested for node likeness.

Returns

boolean

Whether the object looks like a DOM node.

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Returns true if the object is a NodeList. To qualify as a NodeList, the object must have a numeric length property and an item function (which has type 'string' on IE for some reason).

Parameters

`val`	`(Object\|null)`
	Object to test.

Returns

boolean

Whether the object is a NodeList.

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Returns true if the specified value is a Window object. This includes the global window for HTML pages, and iframe windows.

Parameters

`obj`	`?`
	Variable to test.

Returns

boolean

Whether the variable is a window.

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Removes all the child nodes on a DOM node.

Parameters

`node`	`(Node\|null)`
	Node to remove children from.

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Removes a node from its parent.

Parameters

`node`	`(Node\|null)`
	The node to remove.

Returns

(Node|null)

The node removed if removed; else, null.

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Replaces a node in the DOM tree. Will do nothing if oldNode has no parent.

Parameters

`newNode`	`(Node\|null)`
	Node to insert.
`oldNode`	`(Node\|null)`
	Node to replace.

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Converts an HTML into a node or a document fragment. A single Node is used if html only generates a single node. If html generates multiple nodes then these are put inside a DocumentFragment. This is a safe version of goog.dom.DomHelper#htmlToDocumentFragment which is now deleted.

Parameters

`html`	`goog.html.SafeHtml`
	The HTML markup to convert.

Returns

Node

The resulting node.

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Sets the document object.

Parameters

`document`	`Document`
	Document object.

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Enables or disables keyboard focus support on the element via its tab index. Only elements for which goog.dom.isFocusableTabIndex returns true (or elements that natively support keyboard focus, like form elements) can receive keyboard focus. See http://go/tabindex for more info.

Parameters

`element`	`(Element\|null)`
	Element whose tab index is to be changed.
`enable`	`boolean`
	Whether to set or remove a tab index on the element that supports keyboard focus.

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Sets a number of properties on a node.

Parameters

`element`	`(Element\|null)`
	DOM node to set properties on.
`properties`	`(Object\|null)`
	Hash of property:value pairs.

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Sets the text content of a node, with cross-browser support.

Parameters

`node`	`(Node\|null)`
	The node to change the text content of.
`text`	`(string\|number)`
	The value that should replace the node's content.

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goog.dom.DomHelper

new DomHelper( opt_document )

Instance Methods

this.$( element ) → (Element|null)

this.$$<T>( opt_tag, opt_class, opt_el ) → IArrayLike<(R|null)>

this.$dom<T>( tagName, opt_attributes, ...var_args ) → R

this.append( parent, ...var_args ) → void

this.appendChild( parent, child ) → void

this.canHaveChildren( node ) → boolean

this.compareNodeOrder( node1, node2 ) → number

this.contains( parent, descendant ) → boolean

this.copyContents( target, source ) → void

this.createDom<T>( tagName, opt_attributes, ...var_args ) → R

this.createElement<T>( name ) → R

this.createTable( rows, columns, opt_fillWithNbsp ) → HTMLElement

this.createTextNode( content ) → Text

this.findCommonAncestor( ...var_args ) → (Node|null)

this.findNode( root, p ) → (Node|null|undefined)

this.findNodes( root, p ) → (Array<(Node|null)>|null)

this.flattenElement( element ) → (Element|null|undefined)

this.getActiveElement( opt_doc ) → (Element|null)

this.getAncestor( element, matcher, opt_includeNode, opt_maxSearchSteps ) → (Node|null)

this.getAncestorByClass( element, class, opt_maxSearchSteps ) → (Element|null)

this.getAncestorByTagNameAndClass<T>( element, opt_tag, opt_class, opt_maxSearchSteps ) → ?

this.getCanvasContext2D( canvas ) → CanvasRenderingContext2D

this.getChildren( element ) → (Array<Element>|NodeList<Element>)

this.getDocument() → Document

this.getDocumentHeight() → number

this.getDocumentScroll() → goog.math.Coordinate

this.getDocumentScrollElement() → Element

this.getDomHelper( opt_node ) → goog.dom.DomHelper

this.getElement( element ) → (Element|null)

this.getElementByClass( className, opt_el ) → (Element|null)

this.getElementByTagNameAndClass<T>( opt_tag, opt_class, opt_el ) → ?

this.getElementsByClass( className, opt_el ) → IArrayLike<Element>

this.getElementsByTagName<T>( tagName, opt_parent ) → NodeList<(R|null)>

this.getElementsByTagNameAndClass<T>( opt_tag, opt_class, opt_el ) → IArrayLike<(R|null)>

this.getFirstElementChild( node ) → (Element|null)

this.getFrameContentDocument( iframe ) → Document

this.getFrameContentWindow( frame ) → (Window|null)

this.getLastElementChild( node ) → (Element|null)

this.getNextElementSibling( node ) → (Element|null)

this.getNextNode( node ) → (Node|null)

this.getNodeAtOffset( parent, offset, opt_result ) → (Node|null)

this.getNodeTextLength( node ) → number

this.getNodeTextOffset( node, opt_offsetParent ) → number

this.getOuterHtml( element ) → string

this.getOwnerDocument( node ) → Document

this.getParentElement( element ) → (Element|null)

this.getPreviousElementSibling( node ) → (Element|null)

this.getPreviousNode( node ) → (Node|null)

this.getRequiredElement( id ) → Element

this.getRequiredElementByClass( className, opt_root ) → Element

this.getTextContent( node ) → string

this.getViewportSize( opt_window ) → goog.math.Size

this.getWindow() → Window

this.insertChildAt( parent, child, index ) → void

this.insertSiblingAfter( newNode, refNode ) → void

this.insertSiblingBefore( newNode, refNode ) → void

this.isCss1CompatMode() → boolean

this.isElement( obj ) → boolean

this.isFocusable( element ) → boolean

this.isFocusableTabIndex( element ) → boolean

this.isNodeLike( obj ) → boolean

this.isNodeList( val ) → boolean

this.isWindow( obj ) → boolean

this.removeChildren( node ) → void

this.removeNode( node ) → (Node|null)

this.replaceNode( newNode, oldNode ) → void

this.safeHtmlToNode( html ) → Node

this.setDocument( document ) → void

this.setFocusableTabIndex( element, enable ) → void

this.setProperties( element, properties ) → void

this.setTextContent( node, text ) → void

new DomHelper( `opt_document` )

`this.`$( `element` ) `→` `(Element|null)`

`this.`$$`<T>`( `opt_tag`, `opt_class`, `opt_el` ) `→` `IArrayLike<(R|null)>`

`this.`$dom`<T>`( `tagName`, `opt_attributes`, `...var_args` ) `→` `R`

`this.`append( `parent`, `...var_args` ) `→` `void`

`this.`appendChild( `parent`, `child` ) `→` `void`

`this.`canHaveChildren( `node` ) `→` `boolean`

`this.`compareNodeOrder( `node1`, `node2` ) `→` `number`

`this.`contains( `parent`, `descendant` ) `→` `boolean`

`this.`copyContents( `target`, `source` ) `→` `void`

`this.`createDom`<T>`( `tagName`, `opt_attributes`, `...var_args` ) `→` `R`

`this.`createElement`<T>`( `name` ) `→` `R`

`this.`createTable( `rows`, `columns`, `opt_fillWithNbsp` ) `→` `HTMLElement`

`this.`createTextNode( `content` ) `→` `Text`

`this.`findCommonAncestor( `...var_args` ) `→` `(Node|null)`

`this.`findNode( `root`, `p` ) `→` `(Node|null|undefined)`

`this.`findNodes( `root`, `p` ) `→` `(Array<(Node|null)>|null)`

`this.`flattenElement( `element` ) `→` `(Element|null|undefined)`

`this.`getActiveElement( `opt_doc` ) `→` `(Element|null)`

`this.`getAncestor( `element`, `matcher`, `opt_includeNode`, `opt_maxSearchSteps` ) `→` `(Node|null)`

`this.`getAncestorByClass( `element`, `class`, `opt_maxSearchSteps` ) `→` `(Element|null)`

`this.`getAncestorByTagNameAndClass`<T>`( `element`, `opt_tag`, `opt_class`, `opt_maxSearchSteps` ) `→` `?`

`this.`getCanvasContext2D( `canvas` ) `→` `CanvasRenderingContext2D`

`this.`getChildren( `element` ) `→` `(Array<Element>|NodeList<Element>)`

`this.`getDocument() `→` `Document`

`this.`getDocumentHeight() `→` `number`

`this.`getDocumentScroll() `→` `goog.math.Coordinate`

`this.`getDocumentScrollElement() `→` `Element`

`this.`getDomHelper( `opt_node` ) `→` `goog.dom.DomHelper`

`this.`getElement( `element` ) `→` `(Element|null)`

`this.`getElementByClass( `className`, `opt_el` ) `→` `(Element|null)`

`this.`getElementByTagNameAndClass`<T>`( `opt_tag`, `opt_class`, `opt_el` ) `→` `?`

`this.`getElementsByClass( `className`, `opt_el` ) `→` `IArrayLike<Element>`

`this.`getElementsByTagName`<T>`( `tagName`, `opt_parent` ) `→` `NodeList<(R|null)>`

`this.`getElementsByTagNameAndClass`<T>`( `opt_tag`, `opt_class`, `opt_el` ) `→` `IArrayLike<(R|null)>`

`this.`getFirstElementChild( `node` ) `→` `(Element|null)`

`this.`getFrameContentDocument( `iframe` ) `→` `Document`

`this.`getFrameContentWindow( `frame` ) `→` `(Window|null)`

`this.`getLastElementChild( `node` ) `→` `(Element|null)`

`this.`getNextElementSibling( `node` ) `→` `(Element|null)`

`this.`getNextNode( `node` ) `→` `(Node|null)`

`this.`getNodeAtOffset( `parent`, `offset`, `opt_result` ) `→` `(Node|null)`

`this.`getNodeTextLength( `node` ) `→` `number`

`this.`getNodeTextOffset( `node`, `opt_offsetParent` ) `→` `number`

`this.`getOuterHtml( `element` ) `→` `string`

`this.`getOwnerDocument( `node` ) `→` `Document`

`this.`getParentElement( `element` ) `→` `(Element|null)`

`this.`getPreviousElementSibling( `node` ) `→` `(Element|null)`

`this.`getPreviousNode( `node` ) `→` `(Node|null)`

`this.`getRequiredElement( `id` ) `→` `Element`

`this.`getRequiredElementByClass( `className`, `opt_root` ) `→` `Element`

`this.`getTextContent( `node` ) `→` `string`

`this.`getViewportSize( `opt_window` ) `→` `goog.math.Size`

`this.`getWindow() `→` `Window`

`this.`insertChildAt( `parent`, `child`, `index` ) `→` `void`

`this.`insertSiblingAfter( `newNode`, `refNode` ) `→` `void`

`this.`insertSiblingBefore( `newNode`, `refNode` ) `→` `void`

`this.`isCss1CompatMode() `→` `boolean`

`this.`isElement( `obj` ) `→` `boolean`

`this.`isFocusable( `element` ) `→` `boolean`

`this.`isFocusableTabIndex( `element` ) `→` `boolean`

`this.`isNodeLike( `obj` ) `→` `boolean`

`this.`isNodeList( `val` ) `→` `boolean`

`this.`isWindow( `obj` ) `→` `boolean`

`this.`removeChildren( `node` ) `→` `void`

`this.`removeNode( `node` ) `→` `(Node|null)`

`this.`replaceNode( `newNode`, `oldNode` ) `→` `void`

`this.`safeHtmlToNode( `html` ) `→` `Node`

`this.`setDocument( `document` ) `→` `void`

`this.`setFocusableTabIndex( `element`, `enable` ) `→` `void`

`this.`setProperties( `element`, `properties` ) `→` `void`

`this.`setTextContent( `node`, `text` ) `→` `void`