TimerBar JS

Introduction

TimerBar JS brings a visual and minimalist way to put a timer in your website. It is simple, lightweight and easy to use.

Basic usage

const fancyTimerBar = new TimerBar(myElement, myOptions);
fancyTimerBar.trigger();

Options

You might easily customize your TimerBar through its options.

It can either be passed in the constructor like this:

const fancyTimerBar = new TimerBar(myElement, {
    mode: "fill",
    anchor: "bottom",
    height: "50px",
    width: "10px",
});

Or after, accessing the properties directly:

const fancyTimerBar = new TimerBar(myElement);
fancyTimerBar.mode = "fill";
fancyTimerBar.anchor = "bottom";
fancyTimerBar.height = "50px";
fancyTimerBar.width = "10px";

Styling

• width - Sets the width of the TimerBar. It comports all CSS units, like px and em. Integer values like 100 will not work.

• height - Works in the same way as the width property.

• barBackground - Sets the color of the animated bar. It is supported any CSS background definitions such as plain colors, gradients and images.

• background - Change the background of the container likewise the barBackground option.

Behavior

• mode - Defines the main behavior of the TimerBar. It can be:

  • empty - Starts filled and empties out.
  • fill - Starts empty and get filled.

• anchor - Sets the anchor point of the animation, being possible the values: left, right, top and bottom

  For better understanding: A TimerBar with left anchor empties out to the left and gets filled from the left.

  Notice: when the anchor is left or right, the bar will have its width animated. If it is top or bottom, its height will be instead.

• duration - Determine, in milisseconds, how long the animation will take.

• delay - Delays the animation start and the finish event. To define the delay, it is necessary to pass an array whose first index sets the animationStartDelay and the second sets the finishDelay.

  Example: {delay: [200, 400]} - the animation starts after 200ms and the finish event is triggered 400ms later.

• timingFunction - Set the timing function which the animation will operate on. All CSS timing-function types are supported.

Callback functions

{
    triggered: function() {
        console.log("I have been triggered!");
    }
}

• triggered - Do something when the TimerBar starts to act, regardless of the delay.
• finished - Do something when everything is done, even the finish delay.
• started - [future implementation] - Do something when the animation starts, considering the delay.
• ended - [future implementation] - Do something when the animation ends.
• paused - [future implementation]
• resumed - [future implementation]
• reseted - [future implementation]

Notice: In the callback functions, the this keyword will be binded to the TimerBar instance. It's handy to use this.el to access the DOM element of it or even manipulate its options. Eg.: this.background = "#000".

Default values

Option	Value
width	"100%"
height	"20px"
barBackground	"#ccc"
background	"#007bff"
mode	"empty"
anchor	"left"
duration	2000
delay	[0, 0]
timingFunction	"ease"

Events

• trigger() - Starts the show!
• reset() - Redefine the TimerBar to its initial state.
• reverse() - Plays the contrary animation.
• pause() - [future implementation]
• resume() - [future implementation]