Elastic Progress

Creates a button that turns into a progress bar with a elastic effect. Based on a Dribbble shot by xjw. By Lucas Bebber.

Article on Codrops

Demo

Instructions

This project requires GSAP. You can use either TweenMax...

<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.18.0/TweenMax.min.js"></script>

...or TweenLite, with EasePack and the CSS and attr plugins:

<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.18.0/TweenLite.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.18.0/easing/EasePack.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.18.0/plugins/CSSPlugin.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.18.0/plugins/AttrPlugin.min.js"></script>

Then, include the elastic-progress.min.js file, located in the dist folder:

<script src="path/to/js/elastic-progress.min.js"></script>

Usage

Create the element you want to turn into a button:

<div class="Upload" role="button" aria-label="Upload file"></div>

_{Note: We are using a div element with role="button" instead of a button element because, according to W3C recommendation, button elements should have no interactive elements as descendants.}

Then, via JS:

var element=document.querySelector('.Upload');
var progress=new ElasticProgress(element, { /*options*/ });

// or...

var progress=new ElasticProgress('.Upload', { /*options*/});

Or, in case you are using jQuery:

$('.Upload').ElasticProgress({/*options*/});

Setting Options

Options are set on the constructor, like this:

var progress=new ElasticProgress('.Upload', {
  colorFg:"#FF0000",
  buttonSize:80,
  //...
})

A complete list of options can be found below.

Calling Methods

The button doesn't do much by itself - controlling the opening, bar progress, etc. is in your charge.

var progress=new ElasticProgress('.Upload', {
  // ...
  onClick:function(){
    progress.open();
  }
});
function theFunctionYouAreUsingToCheckProgress(){
  // ...
  progress.setValue(value);
}


// with jQuery
$(".Upload").ElasticProgress({
  // ...
  onClick:function(){
    $(this).ElasticProgress('open');
  }
});

function theFunctionYouAreUsingToCheckProgress(){
  // ...
  $(".Upload").ElasticProgress('setValue',value);
}

A complete list of methods can be found below.

Options

arrowDirection string
Either 'up' or 'down'. Defaults to 'down'.

Colors

colorFg, colorBg string
Colors of the foreground (the arrow, the filled part of the progress bar) and the background (the circle, the empty part of the progress bar), respectively. Defaults are white and black.
highlightColor string
Color of the highlight outline. Defaults to #08F.
background string
Color of the overlay during the "pop" animation. Defaults to the background color of the body.

Size

buttonSize number
Circumference of the button. Defaults to the height of the element.
width number
Width of the expanded progress bar. Defaults to the width of the element.
labelHeight number
Height of the label, in pixels. Defaults to 53.
barHeight number
Thickness of the progress bar. Defaults to 4.
barInset number
Inset of the filled part of the progress bar. Defaults to -0.5 _{Helps covering jagged edges}.
bleedTop, bleedRight, bleedLeft and bleedBottom number
Margin to draw the graphics. If there's clipping during the animation, increase these values. Performance might take a hit for values too large. Defaults to 100, 50, 50 and 60 respectively.

Text

fontFamily string
Font used for the label. Defaults to 'Helvetica Neue','Helvetica','Arial',sans-serif. This default is added to the value set, so there's no need to manually set these as fallback.
fontWeight string
Defaults to 'bold'.
textComplete, textFail and textCancel string
Texts that will be shown on these events. Defaults are 'Done', 'Failed' and 'Canceled'.

Animation

barStretch number
The maximum distance the bar will stretch. Defaults to 20.
jumpHeight number
How hight the arrow/label will jump. Defaults to 50.
barElasticOvershoot and barElasticPeriod number
Settings for the elastic animation. Defaults are 1.8 and 0.15, respectively.
labelWobbliness number
Setting for the animation of the label during progress. Defaults to 40.
arrowHangOnFail and arrowHangOnCancel boolean
Whether the arrow should 'fall' on these events or not. Default is true for both.

Events

onClick function
Called when the user clicks the button only.
onOpen function
Called when the progress bar finishes the opening animation.
onChange function
Called when the bar value is changed.
onComplete function
Called when the bar is full.
onClose function
Called when the close animation is finished.
onFail function
Called when the fail animation starts.
onCancel function
Called when the cancel animation starts.

Methods

open()
Starts the opening animation (turns the button into a progress bar).
close()
Turns the progress bar back into a button.
setValue(valuenumber)
Sets the percentage loaded of the progress bar. From 0 to 1.
getValue() number
Returns the current value of the progress bar.
fail() and cancel()
Runs the fail and the cancel animations, respectively.
complete()
Runs the complete animation, regardless of the progress. You should probably call setValue(1) instead.
onClick(callbackfunction), onOpen(callbackfunction), onChange(callbackfunction), onComplete(callbackfunction), onClose(callbackfunction), onFail(callbackfunction) and onCancel(callbackfunction)
Aliases to the options of the same name.

Build

You need node and npm installed. Clone the repo, and on the terminal enter:

$ npm install
$ npm run build

License

Integrate or build upon it for free in your personal or commercial projects. Don't republish, redistribute or sell "as-is".

Misc

Follow Lucas: Twitter, Codepen, GitHub

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