Web Touch Ripple

Version	v1.4.0

Introduction

This package provides visual representation of the pointer event to users, And using web components to implement efficient and simple and flexible touch ripple effects.

See Also, If you want the change-log by version for this package. refer to Change Log for details.

Preview

This is just a preview of a simple example of that package.

This may be different from the real thing (by gif)

How to apply ripple element

Please refer to the following codes for details!

Staticly

This is a solution of converting a string into a function and using it.

Not recommended to use it in this way and it can mainly be used for debugging purposes.

<!-- Called when a user taps or clicks. -->
<touch-ripple ontap="console.log('tap!')">
    <!-- child of the touch-ripple element must be one. -->
    <h1 style="padding: 15px;">
        Hello, world!
    </h1>
</touch-ripple>

Locally

This is the most ideal and widely used solution.

<touch-ripple id="ripple">...</touch-ripple>
<script>
    // in script.
    const ripple = document.getElementById("ripple");

    // Called when a user taps or clicks.
    ripple.ontap = () => console.log("tap!");

    // Called when a user double taps or clicks.
    ripple.ondoubletap = () => console.log("double tap!");

    // Called when a user long press or long clicks or long pointer-down.
    ripple.onlongtap = () => console.log("long tap!");
</script>

How to wait callback until ripple effects are spread all?

This is can implement by adding a attribute wait to a touch-ripple element.

<!-- Called when a ripple effect has spread all, after a user taps and clicks. -->
<touch-ripple ontap="() => ..." wait>

How to connect gestures in parent to a child touch-ripple element?

To connect gestures from a parent element to a child touch-ripple element, you need to using <touch-ripple-connection> element, so it can be done very easily.

Example

See Also
For the sake of example code simplicity, style definitions have been omitted.

<touch-ripple-connection>
    <div style="display: flex; justify-content: center; padding: 50px;"> <!-- from -->
        <touch-ripple ontap="console.log('hello world')">
            <div> <!-- to -->
                <h1>Touch Ripple Connection</h1>
                <span>When using touch-ripple-connection element (by declarating in the parent.)</span>
            </div>
        </touch-ripple>
    </div>
</touch-ripple-connection>

Example Preview

How to register an event at the parent level and apply a ripple effect to a specific child element?

To apply a ripple effect to a specific child element, you can define the selector attribute. This allows you to easily specify the exact child element where the effect will appear, ensuring that the ripple effect is triggered only on the targeted element.

This feature can be very useful in situations where you want to apply an effect to a specific element without changing the element's tree structure, and you only need to define the event on the parent element.

Example

See Also
For the sake of example code simplicity, style definitions have been omitted.

<touch-ripple ontap="console.log('hello world')" selector=".a">
    <div>
        <h1 class="a">Touch Ripple 1</h1>
        <h1 class="b">Touch Ripple 2</h1>
    </div>
</touch-ripple>

Example Preview

How to use with react in typescript?

This is can easily implement this by adding import like the code below.

Refer to Github or NPM for details about JSX.

import "web-touch-ripple";
import { TouchRipple } from "web-touch-ripple/jsx";

export function TestPage() {
    return (
        <TouchRipple onTap={() => console.log("tap!")}>
            <h1>Hello, world!</h1>
        </TouchRipple>
    );
}

Variables of CSS

Name	Description	Default Value
--ripple	The background color of touch-ripple effect.	rgba(0, 0, 0, 0.2)
--ripple-hover	The background color of touch-ripple effect when the hover state.	rgba(0, 0, 0, 0.1)
--ripple-hover-duration	This is duration of fade-in or fade-out about the hover effect.	0.25s
--ripple-spread-duration	The duration until the ripple effect completely fills the element.	0.25s
--ripple-spread-curve	This is curve for fade-in and spread animation of ripples.	cubic-bezier(.2,.3,.4,1)
--ripple-fadein-duration	The duration of fade-in animation about a ripple effect.	0.15s
--ripple-fadein-curve	This is curve for fade-in animation about a ripple effect.	default of browser
--ripple-fadeout-duration	The duration until the ripple effect disappears.	0.3s
--ripple-fadeout-curve	This is curve for fade-out animation of ripples.	default of browser
--ripple-cancel-duration	This is curve for fade-out animation of ripples when cancels.	0s
--ripple-cancel-curve	This is curve for fade-out animation of ripples when cancels.	default of browser
--ripple-blur-radius	The blur effect radius pixels or percent of touch ripple effect.	5%
--ripple-min-blur-radius	The blur effect radius minimum pixels of touch ripple effect in percentage-based environments.	0px
--ripple-max-blur-radius	The blur effect radius maximum pixels of touch ripple effect in percentage-based environments.	30px
--ripple-lower-scale	The ripple scale of start point.	0.3
--ripple-upper-scale	The ripple scale of end point.	1
--ripple-tap-preview-duration	The rejectable duration about tap event.	0.15s
--ripple-tappable-duration	After a pointer down occurs, gestures are rejected after this duration.	none
--ripple-double-tappable-duration	This duration required to define if it is a double tap.	0.1s
--ripple-long-tappable-duration	This duration required to define if it is a long tap.	1s
--ripple-long-tappable-curve	This is curve for fade-in animation of ripples about long tap.	linear
--ripple-overlap-behavior	This option defines the behavior of a touch ripple when it overlaps. (overlappable, cancel, ignoring)	overlappable
--ripple-use-hover	Whether or not to apply the hover effect.	1 (true)

How to customize gestures?

Use the Gesture Arena and Gesture Recognizer provide on this package.

// for gestures competition for accept on the place.
this.arena = new GestureArena();

// for factory function registering about the gesture-recognizer.
this.arena.registerBuilder(() =>
    new TapGestureRecognizer(...args)
);

How to make gesture recognizer?

Please refer to the following codes for details!

// in `gesture_recognizer.ts`
export class TouchRippleGestureRecogzier extends GestureRecognizer { ... }

// e.g.
export class TestGestureRecognizer extends TouchRippleGestureRecogzier {
    constructor(
        public callback1: GestureEventCallback,
        public callback2: GestureEventCallback,
        public callback3: GestureEventCallback,
    ) {
        super();
    }

    pointerDown(position: PointerPosition): void { ... }
    pointerMove(positoin: PointerPosition): void { ... }
    pointerUp(positoin: PointerPosition): void { ... }
    pointerCancel(positoin: PointerPosition): void { ... }

    dispose(): void {
        // Defines all values defined for judgment as null.
    }

    onAccept(): void { ... }
    onReject(): void { ... }
}