A collection of useful functions to make mobile prototyping with Framer easier. For full reference, check our annotated source code in library.coffee.

• Save your project and open the project folder
• Download library.js into the framer folder inside your project folder
• Include at the top of your code:

Utils.domLoadScriptSync("framer/library.js")

Include library.js right before app.js in your Framer index.html file.

• After importing your PSD/Sketch layers, call initialize to create global Javascript variables for every layer for quick access:

myLayers = Framer.Importer.load "..."
Framer.Shortcuts.initialize(myLayers)

• This will let you access PSD["My Layer"] as simply My_Layer
• Note that some Javascript variable names are reserved and using them as layer names can cause problems.
• layer.originalFrame stores the initial position and size of each exported layer, so you can easily revert back to them later

• layer.animateTo({x: 100}, [time], [curve], [callback]) is a shorthand that mirrors jQuery's animation syntax. You can specify a duration, curve and callback in order, and omit the ones you'd like. Note that in Framer 3, time is now specified in seconds.
• layer.slideFromLeft() layer.slideToLeft() (and similarly Left, Bottom, Top) are quick animation functions to animate full screen layers in and out of the viewport. Very useful for prototyping mobile flows.
• layer.show() layer.hide() shows and hides layers.
• layer.fadeIn() layer.fadeOut() fades in/out layers with an animation. You can use a custom duration too: layer.fadeIn(0.5)
• show, hide, fadeIn and fadeOut can take layers or arrays containing layers.

• Free hover and tap/click states: append touchable to a group's name, and include children that have hover and down in their name. Events will be automatically bound to show these hover and tap/click states.
• Shortcut: instead of layer.on('touchup', function() {}) use layer.tap(function() {}). This also works with mouse events.
• Shortcut: instead of layer.on('mouseover', function() {}); layer.on('mouseout', function() {}); use layer.hover(function() {}, function() {})

• If your prototype has a parent Phone group, we automatically add a phone image around your prototype and resize to fit in a browser screen. Great for presenting!
• By default, the parent group is called Phone and the device is an iPhone in a 640x1136 canvas. Check the Display In Device section in the source code to see how you can configure for different devices.
• Press the space bar key to toggle this on and off.

• layer.getChild('name') and layer.getChildren('name') retrieve the children of a layer by name. Useful when traversing the layer hierarchy.
• Framer.utils.convertRange(OldMin, OldMax, OldValue, NewMin, NewMax, [capped]) converts a number oldValue from one range (oldMin, oldMax) to another (newMin, newMax). If you'd like to cap the output to NewMin and NewMax, enable capped.

All the animation functions use curves and times that can be customized. In addition, the Display in Device functionality can be changed to enable different devices, to add a holding hand image, or a background. Check the very top of library.js to see all the options.

Feel free to contact the project's maintainer, Cemre Gungor, on gem-at-fb-dot-com or @gem_ray on Twitter.