dom

dom.js

Members

static, constant $

Finds a single DOM element matching selector within the optional context of another DOM element (defaulting to document).

static, constant $$

Finds a all DOM elements matching selector within the optional context of another DOM element (defaulting to document).

Methods

static addClass(element, classToAdd) → {Element}

Add a class name to an element.

Parameters:
Name Type Description
element Element

Element to add class name to.

classToAdd string

Class name to add.

Returns:
Element -

The DOM element with the added class name.

static appendContent(el, content) → {Element}

Normalizes and appends content to an element.

Parameters:
Name Type Description
el Element

Element to append normalized content to.

content module:dom~ContentDescriptor

A content descriptor value.

Returns:
Element -

The element with appended normalized content.

static blockTextSelection()

Attempt to block the ability to select text.

static createEl(tagNameopt, propertiesopt, attributesopt, content) → {Element}

Creates an element and applies properties, attributes, and inserts content.

Parameters:
Name Type Attributes Default Description
tagName string <optional>
'div'

Name of tag to be created.

properties Object <optional>
{}

Element properties to be applied.

attributes Object <optional>
{}

Element attributes to be applied.

content module:dom~ContentDescriptor

A content descriptor object.

Returns:
Element -

The element that was created.

static emptyEl(el) → {Element}

Empties the contents of an element.

Parameters:
Name Type Description
el Element

The element to empty children from

Returns:
Element -

The element with no children

static findPosition(el) → {module:dom~Position}

Get the position of an element in the DOM.

Uses getBoundingClientRect technique from John Resig.

Parameters:
Name Type Description
el Element

Element from which to get offset.

Returns:
module:dom~Position -

The position of the element that was passed in.

See:

static getAttribute(el, attribute) → {string}

Get the value of an element's attribute.

Parameters:
Name Type Description
el Element

A DOM element.

attribute string

Attribute to get the value of.

Returns:
string -

The value of the attribute.

static getAttributes(tag) → {Object}

Get an element's attribute values, as defined on the HTML tag.

Attributes are not the same as properties. They're defined on the tag or with setAttribute.

Parameters:
Name Type Description
tag Element

Element from which to get tag attributes.

Returns:
Object -

All attributes of the element. Boolean attributes will be true or false, others will be strings.

static getBoundingClientRect(el) → {Object|undefined}

Identical to the native getBoundingClientRect function, but ensures that the method is supported at all (it is in all browsers we claim to support) and that the element is in the DOM before continuing.

This wrapper function also shims properties which are not provided by some older browsers (namely, IE8).

Additionally, some browsers do not support adding properties to a ClientRect/DOMRect object; so, we shallow-copy it with the standard properties (except x and y which are not widely supported). This helps avoid implementations where keys are non-enumerable.

Parameters:
Name Type Description
el Element

Element whose ClientRect we want to calculate.

Returns:
Object | undefined -

Always returns a plain object - or undefined if it cannot.

static getPointerPosition(el, event) → {module:dom~Coordinates}

Get the pointer position within an element.

The base on the coordinates are the bottom left of the element.

Parameters:
Name Type Description
el Element

Element on which to get the pointer position on.

event EventTarget~Event

Event object.

Returns:
module:dom~Coordinates -

A coordinates object corresponding to the mouse position.

static hasClass(element, classToCheck) → {boolean}

Check if an element has a class name.

Parameters:
Name Type Description
element Element

Element to check

classToCheck string

Class name to check for

Throws:

Throws an error if classToCheck has white space.

Type
Error
Returns:
boolean -

Will be true if the element has a class, false otherwise.

static insertContent(el, content) → {Element}

Normalizes and inserts content into an element; this is identical to appendContent(), except it empties the element first.

Parameters:
Name Type Description
el Element

Element to insert normalized content into.

content module:dom~ContentDescriptor

A content descriptor value.

Returns:
Element -

The element with inserted normalized content.

static isEl(value) → {boolean}

Determines, via duck typing, whether or not a value is a DOM element.

Parameters:
Name Type Description
value Mixed

The value to check.

Returns:
boolean -

Will be true if the value is a DOM element, false otherwise.

static isInFrame() → {boolean}

Determines if the current DOM is embedded in an iframe.

Returns:
boolean -

Will be true if the DOM is embedded in an iframe, false otherwise.

static isReal() → {boolean}

Whether the current DOM interface appears to be real (i.e. not simulated).

Returns:
boolean -

Will be true if the DOM appears to be real, false otherwise.

static isSingleLeftClick(event) → {boolean}

Check if an event was a single left click.

Parameters:
Name Type Description
event EventTarget~Event

Event object.

Returns:
boolean -

Will be true if a single left click, false otherwise.

static isTextNode(value) → {boolean}

Determines, via duck typing, whether or not a value is a text node.

Parameters:
Name Type Description
value Mixed

Check if this value is a text node.

Returns:
boolean -

Will be true if the value is a text node, false otherwise.

static normalizeContent(content) → {Array}

Normalizes content for eventual insertion into the DOM.

This allows a wide range of content definition methods, but helps protect from falling into the trap of simply writing to innerHTML, which could be an XSS concern.

The content for an element can be passed in multiple types and combinations, whose behavior is as follows:

Parameters:
Name Type Description
content module:dom~ContentDescriptor

A content descriptor value.

Returns:
Array -

All of the content that was passed in, normalized to an array of elements or text nodes.

static prependTo(child, parent)

Insert an element as the first child node of another

Parameters:
Name Type Description
child Element

Element to insert

parent Element

Element to insert child into

static removeAttribute(el, attribute)

Remove an element's attribute.

Parameters:
Name Type Description
el Element

A DOM element.

attribute string

Attribute to remove.

static removeClass(element, classToRemove) → {Element}

Remove a class name from an element.

Parameters:
Name Type Description
element Element

Element to remove a class name from.

classToRemove string

Class name to remove

Returns:
Element -

The DOM element with class name removed.

static setAttribute(el, attribute, value)

Set the value of an element's attribute.

Parameters:
Name Type Description
el Element

A DOM element.

attribute string

Attribute to set.

value string

Value to set the attribute to.

static setAttributes(el, attributesopt)

Apply attributes to an HTML element.

Parameters:
Name Type Attributes Description
el Element

Element to add attributes to.

attributes Object <optional>

Attributes to be applied.

static textContent(el, text) → {Element}

Injects text into an element, replacing any existing contents entirely.

Parameters:
Name Type Description
el Element

The element to add text content into

text string

The text content to add.

Returns:
Element -

The element with added text content.

static toggleClass(element, classToToggle, predicateopt) → {Element}

Adds or removes a class name to/from an element depending on an optional condition or the presence/absence of the class name.

Parameters:
Name Type Attributes Description
element Element

The element to toggle a class name on.

classToToggle string

The class that should be toggled.

predicate boolean | module:dom~PredicateCallback <optional>

See the return value for module:dom~PredicateCallback

Returns:
Element -

The element with a class that has been toggled.

static unblockTextSelection()

Turn off text selection blocking.

Type Definitions

ContentDescriptor()

This is a mixed value that describes content to be injected into the DOM via some method. It can be of the following types:

Type Description
string The value will be normalized into a text node.
Element The value will be accepted as-is.
TextNode The value will be accepted as-is.
Array A one-dimensional array of strings, elements, text nodes, or functions. These functions should return a string, element, or text node (any other return value, like an array, will be ignored).
Function A function, which is expected to return a string, element, text node, or array - any of the other possible values described above. This means that a content descriptor could be a function that returns an array of functions, but those second-level functions must return strings, elements, or text nodes.

Coordinates

Represents x and y coordinates for a DOM element or mouse pointer.

Properties:
Name Type Description
x number

x coordinate in pixels

y number

y coordinate in pixels

Position

Represents the position of a DOM element on the page.

Properties:
Name Type Description
left number

Pixels to the left.

top number

Pixels from the top.

PredicateCallback(element, classToToggle) → {boolean|undefined}

The callback definition for toggleClass.

Parameters:
Name Type Description
element Element

The DOM element of the Component.

classToToggle string

The className that wants to be toggled

Returns:
boolean | undefined -

If true is returned, the classToToggle will be added to the element. If false, the classToToggle will be removed from the element. If undefined, the callback will be ignored.