1.0.0 • Public • Published


(CosmicAnimation) is an alternative for creating dynamic CSS animations using JavaScript, it is easy to use, easy to implement and requires no additional effort.

Import CosmicAnimation

Use the NPM package manager to install the CosmicAnimation library.

    npm install cosmic-animation

Import the library using CosmicAnimation.

    import CosmicAnimation from 'cosmic-animation';


Assuming you have an element you want to animate.

    <div id="idDiv"></div>

You can instantiate a CosmicAnimation class using the following instruction.

    // Receives a CSS selector, as does (document.querySelector).

    /* Instantiate an object of type (CosmicAnimation), receives by parameters: 
        --- The selector of our element.
        --- The name of our animation. */
    const cosmicDiv = new CosmicAnimation('#idDiv', 'div-animation');

If you do not define the second parameter, a random animation name is assigned.

    const cosmicDiv = new CosmicAnimation('#idDiv');

More elements

Now you have more elements.

    <div id="idDiv"></div>
    <div id="div"></div>

You can define more than one CosmicAnimation object at a time.

    /* Returns CosmicAnimation[]: 
        --- Selectors.
        --- Names for each animation. */
    const arrElementsCosmic = new CosmicAnimation(
        ['#idDiv', '.div', 'div'], 
        ['animacion-1', 'animacion-2', 'animacion-3']

    arrElementsCosmic[0]; // CosmicAnimation

The third element will have an automatic animation name.

    const arrElementsCosmic = new CosmicAnimation(
        ['#idDiv', '.div', 'div'], 
        ['animacion-1', 'animacion-2']

Animation names are assigned automatically.

    const arrElementsCosmic = new CosmicAnimation(['#idDiv', '.div', 'div']);

Like any array, the returned array CosmicAnimation[] can be iterated.

    arrElementsCosmic.forEach(elementCosmic => {
        // ...

Animation settings

Like any CSS animation, if you already know the common CSS animation settings, you will see that it is the same.

These are the default settings.

    const cosmicDiv = new CosmicAnimation('#idDiv');

    // Settings for this element.
    cosmicDiv.animation = {
        // Animation name for this element.
        name: 'name',
        // Animation time.
        delay: 0,
        // Duration time.
        duration: 1500,
        // How many times the animation will be repeated.
        iterationCount: 1, 
        // Direction of the animation, (normal, reverse, alternate, etc).
        direction: 'normal', 
        // Type of functionality, (smooth, fast, same, etc).
        timingFunction: 'linear',
        // Save final styles, (save changes or not).
        fillMode: 'forwards'


We can configure the ObserverViewport to determine whether the animation is executed when it enters or exits the ObserverViewport.

The ObserveViewport object has two properties.

    cosmicDiv.observeViewport = {
        // Defines if the object will take the animation only when it is inside the viewport, that is, the visible part of the user's page.
        enabled: false,
        // Defines whether the animation will be repeated only once or indefinitely.
        infinite: false

Create (start) and (end) animations

The methods receive two parameters: --- The value with which to start the element in the animation. --- The value to end the element in the animation with.

Add the properties on the element, (start of animation, end of animation).

Normal properties.

    cosmicDiv.width(0, 200);
    cosmicDiv.height(0, 200);
    cosmicDiv.color('red', 'blue');
    cosmicDiv.bgColor('yellow', 'green');
    cosmicDiv.opacity(0, 1);
    cosmicDiv.padding(0, 30);
    cosmicDiv.margin(0, 30);

Properties that transform.

    cosmicDiv.rotate(0, 360);
    cosmicDiv.translateX(0, 300);
    cosmicDiv.translateY(0, 300);
    cosmicDiv.scale(0, 1);

Method chaining

How? Is it unpleasant to use this form?

Then let's use the method chaining.

        .width(0, 200).height(0, 200)
        .color('red', 'blue').bgColor('yellow', 'green')
        .translateX(0, 300).translateY(0, 300).scale(0, 1)
        .padding(0, 30).margin(0, 30);

Other properties

If you want to use a property that is not among these, use the following method.

    // Property, (start, end).
        'border: 2px solid #000;', 
        'border: 6px solid blue;'


    @keyframes animation-name{
            border: 2px solid #000;
            border: 6px solid blue;

Now run the animation.


This injects a tag (style) into the DOM with the animations.

Animation by fractions

CosmicAnimation allows you to animate at different points.

  • Animation at a specific point: (start) to (end).
  • Animation in fractions: (3/3), (5/5) and (9/9).

This has to be specified explicitly.

Create animations (3/3)

We can define each point of the animation in 3 steps, (3/3).

The output is the following.

	@keyframes circle-move{
        /* 1/3 */
		0%{ background-color: blue; opacity: 0; }
        /* 2/3 */
		50%{ background-color: blue; opacity: 0.5; }
        /* 3/3 */
		100%{ background-color: red; opacity: 1; }

How do we do that?

Simply with methods belonging to CosmicAnimation.

Some settings for the animation.

    cosmicDiv.animation = {
        name: 'circle-move',
        delay: 0,
        duration: 3000,
        iterationCount: 'infinite',
        direction: 'alternate',
        timingFunction: 'linear',
        fillMode: 'forwards'

Animations, now in thirds, (3/3).

        // We define each state of each property at each stage of the animation.
        .opacity(0, "1/3").opacity(0.5, "2/3").opacity(1, "3/3")
        .bgColor("blue", "1/3").bgColor("blue", "1/2").bgColor("red", "3/3")
        // We run the animation.

If some stages of the animation are the same, we can simplify it by using Arrays.

        .opacity(0, "1/3").opacity(0.5, "2/3").opacity(1, "3/3")
        // Same logic with Arrays.
        .bgColor("blue", ["1/3", "2/3"])
        .bgColor("red", "3/3")
        // We run the animation.

Create animations (5/5)

The animation is built as follows (5/5).

    @keyframes animation-name{
		0%{ transform: scale(0); background-color: red;}

		25%{ transform: scale(0.3); background-color: blue;}

		50%{ transform: scale(0.3); background-color: blue;}

		75%{ transform: scale(0.4); background-color: blue;}

		100%{ transform: scale(0.5); background-color: red;}

Defines the state of a CSS property on this DIV element indicating it at each point of the animation.

    // Some settings. = "AnimacionPulsacion";
    cosmicDiv.animation.duration = 3000;
    cosmicDiv.animation.iterationCount = Infinity;

    // Opacity at different points in the animation.
    cosmicDiv.scale(0, '1/5')
        .scale(0.3, '2/5').scale(0.3, '3/5')
        .scale(0.4, '4/5').scale(0.5, '5/5');

    // Now the background color.
    cosmicDiv.bgColor('red', '1/5')
        .bgColor('blue', '2/5')
        .bgColor('blue', '3/5')
        .bgColor('blue', '4/5')
        .bgColor('red', '5/5')

Remember that we can simplify it.

    cosmicDiv.scale(0, '1/5')
        // The state of the property is the same at these points in the animation.
        .scale(0.3, ['2/5', '3/5'])
        .scale(0.4, '4/5')
        .scale(0.5, '5/5')
        // Others.
        .bgColor('red', ['1/5', '5/5'])
        .bgColor('blue', ['2/5', '3/5', '4/5'])

Create animations (9/9)

Now we are controlling nine stages of the animation, by splitting the animation into (9/9).

CSS Output.

	@keyframes circle-move{
		0%{ transform: translateX(0px); opacity: 0; }

		12.5%{ transform: translateX(0px); opacity: 0; }

		25%{ transform: translateX(100px); opacity: 0.3; }

		37.5%{ transform: translateX(100px); opacity: 0.3; }

		50%{ transform: translateX(200px); opacity: 0.6; }

		62.5%{ transform: translateX(200px); opacity: 0.6; }

		75%{ transform: translateX(300px); opacity: 0.8; }

		87.5%{ transform: translateX(400px); opacity: 1; }

		100%{ transform: translateX(400px); opacity: 1; }

Properties with *CosmicAnimation.

    // Every two stages the animations are the same.
        .opacity(0, ['1/9', '2/9'])
        .opacity(0.3, ['3/9', '4/9'])
        .opacity(0.6, ['5/9', '6/9'])
        // Here it is different.
        .opacity(0.8, '7/9')
        .opacity(1, ['8/9', '9/9']);

    // See that sometimes it can be neater without it (chaining of methods).
    // But it's your choice.
    cosmicDiv.translateX(100, ['1/9', '2/9', '3/9']);
    cosmicDiv.translateX(200, ['4/9', '5/9', '6/9']);
    cosmicDiv.translateX(300, ['7/9', '8/9', '9/9']);


Prefabricated animations

If we have a few methods for creating animations, we have some pre-made methods that we can take advantage of.

From screen

All of this applies to this DIV element that we are manipulating.

The parameters received are (duration) and (delay).

     * From.

    // Appears to the right from off screen.
    cosmicDiv.fromWindowTo("right", 2000, 0);
    // Appears to the left from off screen.
    cosmicDiv.fromWindowTo("left", 2000, 0);

    // A small circle comes from above and leaves a square.
    cosmicDiv.circleTo('top', 2500, 3000);

    // A small circle comes from below and leaves a square.
    cosmicDiv.circleTo('bottom', 2500, 3000);

     * Appear.

    // It only appears from a broadcast.
    cosmicDiv.appear(1300, 0);
    // Appears from a blur towards the specified direction.
    cosmicDiv.appearTo("top", 1300, 0);
    cosmicDiv.appearTo("right", 1300, 0);
    cosmicDiv.appearTo("bottom", 1300, 0);
    cosmicDiv.appearTo("left", 1300, 0);

     * Fade out.

    // It just disappears.
    cosmicDiv.fadeOut(1300, 0);
    // Disappears into a blur in the specified direction.
    cosmicDiv.fadeOutTo("top", 1300, 0);
    cosmicDiv.fadeOutTo("right", 1300, 0);
    cosmicDiv.fadeOutTo("bottom", 1300, 0);
    cosmicDiv.fadeOutTo("left", 1300, 0);

    // The element appears from top to bottom, and after a moment it is hidden again.
    cosmicDiv.appearAndFadeOut(1300, 0);

     * Fade out by letters.

    /* The letters of a text disappear one by one, receive by parameters: 
        --- Pixel spacing of text spaces.
        --- Time in which each letter disappears. */
    cosmicDiv.fadeOutLetters(6, 100);

    // The text of the element disappears letter by letter towards a specified direction.
    cosmicDiv.fadeOutLettersTo("top", 6, 100);
    cosmicDiv.fadeOutLettersTo("right", 6, 100);
    cosmicDiv.fadeOutLettersTo("bottom", 6, 100);
    cosmicDiv.fadeOutLettersTo("left", 6, 100);

    // The text disappears letter by letter to random addresses: ["top", "right", "bottom", "left", "center"].
    cosmicDiv.fadeOutLettersRandom(6, 100);

     * Scale.

    // Increase from a minimum scale to its normal scale.
    cosmicDiv.increment(2000, 0);

    // It increases from a minimum scale to its normal scale and at the end gives a pulse.
    cosmicDiv.incrementPulse(2000, 0);

    // Give a pulse.
    cosmicDiv.pulse(1000, 0);

    // Alpita indefinitely increases and decreases its scale slightly.
    cosmicDiv.palpite(3000, 0);

When (ending) and (restarting) animation

We have a few methods to finish the animation.

(terminate) Method

    // The time will be (x2) since the animation is repeated twice.
    cosmicDiv.animation.iterationCount = 2;

    // We use a prefabricated animation.

    // We run the animation.

    /* The (terminate) method is executed only when the animation ends, receive by parameter: 
        --- A callback that is executed when the animation ends. */
    cosmicDiv.terminate(function(){"The animation is over");

(deleteAnimation) Method

You can clean up all the animations you put in the element and the DOM.

    const cosmicDiv = new CosmicAnimation(".my-element");
    cosmicDiv.animation.iterationCount = 2;

    // When the animation ends.
        // We clean up the element animations.
        // New animations and we run.

Multiple animation

You can manipulate the element as many times as you want, clean up animations and define new animations.

    const cosmicDiv = new CosmicAnimation("#idOne");

    // First animations.
    cosmicDiv.animation.iterationCount = 2;

    // At the end of the animation.
        // Second animation.

        cosmicDiv.terminate(() => {
            // Third animation.

            cosmicDiv.terminate(() => {
                // Fourth animation.

          "The last animation is cleared.");

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