Hammer.JS: Utils

forEach over arrays and objects

• obj <Object | Array>
• iterator <Function>
  • item <Any>
  • index <Number>
  • obj <Object | Array>

    the source object

• context <Object>

  value to use as this in the iterator

extend method, could also be used for cloning when dest is an empty object. changes the dest object

• dest <Object>
• src <Object>
• [merge=false] <Boolean>

  do a merge

calculate the angle between two coordinates

• touch1 <Touch>
• touch2 <Touch>

get the center of all the touches

• touches <Array>

do a small comparision to get the direction between two touches.

• touch1 <Touch>
• touch2 <Touch>

calculate the distance between two touches

• touch1 <Touch>
• touch2 <Touch>

calculate the rotation degrees between two touchLists

• start <Array>

  array of touches

• end <Array>

  array of touches

calculate the scale factor between two touchLists no scale is 1, and goes down to 0 when pinched together, and bigger when pinched out

• start <Array>

  array of touches

• end <Array>

  array of touches

calculate the velocity between two points. unit is in px per ms.

• deltaTime <Number>
• deltaX <Number>
• deltaY <Number>

find if a node is in the given parent

• node <HTMLElement>
• parent <HTMLElement>

find if a array contains the object using indexOf or a simple polyfill

• src <String>
• find <String>

find if a string contains the string using indexOf

• src <String>
• find <String>

find out if the direction is vertical *

• direction <String>

  matches DIRECTION_UP|DOWN

simple removeEventListener wrapper

• element <HTMLElement>
• type <String>
• handler <Function>

simple addEventListener wrapper

• element <HTMLElement>
• type <String>
• handler <Function>

convert an array-like object (arguments, touchlist) to an array

• obj <Object>

toggle browser default behavior by setting css properties. userSelect='none' also sets element.onselectstart to false userDrag='none' also sets element.ondragstart to false

• element <HtmlElement>
• props <Object>
• [toggle=true] <Boolean>