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 CSS 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 String | Element | TextNode | Array | function

See the content argument of dom:normalizeContent

Returns:
Element -

The element with appended normalized content.

static blockTextSelection()

Attempt to block the ability to select text while dragging controls

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

Creates an element and applies properties.

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 String | Element | TextNode | Array | function <optional>

Contents for the element (see: dom:normalizeContent)

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}

Offset Left. 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 -

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 (which shouldn't be used with HTML) This will return true or false for boolean attributes.

Parameters:
Name Type Description
tag Element

Element from which to get tag attributes.

Returns:
Object -

All attributes of the element.

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

static getPointerPosition(el, event) → {Dom~Coordinates}

Get pointer position in element Returns an object with x and y coordinates. 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:
Dom~Coordinates -

A Coordinates object corresponding to the mouse position.

static hasClass(element, classToCheck) → {boolean}

Check if an element has a CSS class

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 -
  • True if the element had the 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 String | Element | TextNode | Array | function

See the content argument of dom:normalizeContent

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 thing to check

Returns:
boolean -
  • True if it is a DOM element
      - False otherwise

static isReal() → {Boolean}

Whether the current DOM interface appears to be real.

Returns:
Boolean

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 -
  • True if it 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 protects from falling into the trap of simply writing to innerHTML, which is 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 String | Element | TextNode | Array | function
  • String: Normalized into a text node.
     - Element/TextNode: Passed through.
     - Array: A one-dimensional array of strings, elements, nodes, or functions
       (which return single strings, elements, or nodes).
     - Function: If the sole argument, is expected to produce a string, element,
       node, or array as defined above.
Returns:
Array -

All of the content that was passed in normalized.

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 CSS 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 CSS class name on 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 | PredicateCallback <optional>

See the return value for Dom~PredicateCallback

Returns:
Element -

The element with a class that has been toggled.

static unblockTextSelection()

Turn off text selection blocking

inner classRegExp(className) → {RegExp}

Produce a regular expression for matching a className within an elements className.

Parameters:
Name Type Description
className string

The className to generate the RegExp for.

Returns:
RegExp -

The RegExp that will check for a specific className in an elements className.

inner createQuerier(method) → {function}

Creates functions to query the DOM using a given method.

Parameters:
Name Type Description
method string

The method to create the query with.

Returns:
function -

The query method

inner isNonBlankString(str) → {boolean}

Detect if a value is a string with any non-whitespace characters.

Parameters:
Name Type Description
str string

The string to check

Returns:
boolean -
  • True if the string is non-blank
      - False otherwise

inner throwIfWhitespace(str)

Throws an error if the passed string has whitespace. This is used by class methods to be relatively consistent with the classList API.

Parameters:
Name Type Description
str string

The string to check for whitespace.

Throws:

Throws an error if there is whitespace in the string.

Type
Error

Type Definitions

Position

The postion of a DOM element on the page.

Properties:
Name Type Description
left number

Pixels to the left

top number

Pixels on top