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It's like iScroll, except not for scrolling. Supports mouse and touch events.\r\n\r\nCheck out the demos on the [home page](http://chrisbateman.github.io/impetus).\r\n\r\nImpetus will probably never support anything other than simple momentum. If you need scrolling or touch carousels or anything like that, this probably isn't the tool you're looking for.\r\n\r\n\r\n### Usage ###\r\n```javascript\r\nvar myImpetus = new Impetus({\r\n source: myNode,\r\n update: function(x, y) {\r\n // whatever you want to do with the values\r\n }\r\n});\r\n```\r\nYou give it an area to listen to for touch or mouse events, and it gives you the `x` and `y` values with some momentum.\r\n\r\nImpetus will register itself as an AMD module if it's available.\r\n\r\n\r\n### Constructor Options ###\r\n\r\n\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\r\n\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\r\n
TypeDefaultDescription
sourceHTMLElement|StringdocumentElement reference or query string for the target on which to listen for movement.
update (required)function(x, y)-This function will be called with the updated x and y values.
multiplierNumber1The relationship between the input and output values.
frictionNumber0.92Rate at which values slow down after you let go.
initialValues[Number, Number][0, 0]Array of initial x and y values.
boundX[Number, Number]-Array of low and high values. x-values will remain within these bounds.
boundY[Number, Number]-Array of low and high values. y-values will remain within these bounds.
bounceBooleantrueWhether to stretch and rebound values when pulled outside the bounds.
\r\n\r\n\r\n### Methods ###\r\n\r\n\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\r\n\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\r\n
Description
.pause()Disable movement processing.
.resume()Re-enable movement processing.
.setMultiplier( <number> )Adjust the multiplier in flight.
.setValues( <number> , <number> )Adjust the current x and y output values.
.setBoundX( <number[2]> )Adjust the X bound
.setBoundY( <number[2]> )Adjust the Y bound
.destroy()\r\n\t\t\t\tThis will remove the previous event listeners. Returns null so you can use it to destroy your variable if you wish, i.e. instance = instance.destroy()\r\n\t\t\t
\r\n\r\n\r\n### Browser Support ###\r\nChrome, Firefox, Safari, Opera, IE 9+, iOS, Android. Support for IE 8 can be achieved by adding a polyfill for `addEventListener`.\r\n\r\n","maintainers":[{"name":"chrisbateman","email":"chris@cbateman.com"}],"time":{"modified":"2022-06-19T00:52:52.796Z","created":"2015-09-26T22:40:04.530Z","0.8.1":"2015-09-26T22:40:04.530Z","0.8.3":"2015-09-29T20:28:41.826Z","0.8.4":"2017-06-09T04:38:32.460Z","0.8.5":"2017-06-09T05:36:38.772Z","0.8.6":"2017-06-10T03:21:24.576Z","0.8.7":"2017-06-10T04:20:27.092Z","0.8.8":"2018-11-23T23:03:44.111Z"},"homepage":"http://chrisbateman.github.io/impetus/","keywords":["momentum","touch"],"repository":{"type":"git","url":"git+ssh://git@github.com/chrisbateman/impetus.git"},"author":{"name":"Chris Bateman"},"bugs":{"url":"https://github.com/chrisbateman/impetus/issues"},"license":"MIT","readmeFilename":"README.md"}