Roll Dice in High-Fidelity 3D
Gameification PWA Tutorial Emerging Tech

Roll Dice in High-Fidelity 3D

Scott C. Krause | Monday, Nov 2, 2020

Rolling dice virtually is not the same experience as rolling dice physically. It just doesn't feel real. The dice do not appear to tumble or make sounds. This disconnected experience makes one suspect that maybe these on-line dice are not really random.

It would be great to recreate the experience of actually rolling dice in the browser. It would be reminiscent of marathon Monopoly with your friends. It would be like Vegas baby!

In this article I introduce a gamified micro-interaction in which dice are rolled virtually by shaking the phone. The sensation is complete with haptic and audio feedback making it seem like the bones are rattling in your sweaty palm. The mathematical integrity of the roll result is achieved through the high entropy of the Web Crypto API.

"Why?", you might and should ask. I prefer to answer the "Why" in terms of business value.

  1. The PWA proposition: It is not uncommon for startups to develop a web app, an iPhone app, and an Android app. When management is convinced that a web app can be just as engaging as native they will decide to focus solely on the web app and get to market much quicker (PWA=MVP). Making a web app installable results in increased traffic, visitor retention, sales per customer, and conversions. I believe that this project proves beyond doubt the immersive potential of browser APIs.

  2. The argument for Gamification: Framing a customer touch-point as a playful game has the potential to differentiate, engage, and persuade like nothing else.

  3. Professional Branding: I am doing this because it allows me to integrate emerging browser APIs in such a way that I have a slick deliverable to demonstrate when I am done.

You will learn these skills while building this project:

  • Accelerometer API
  • Audio API
  • Blender 3D Modeling
  • Git
  • glTF
  • HTML canvas
  • JavaScript
  • NPM
  • Three.js
  • Vibration API
  • UV Mapping
  • Web Crypto API
  • WebGL
  • Webpack

This is totally doable for you because you are a smart developer, designer, and magical unicorn.

Project Overview

We will write custom JavaScript that will animate the dice by changing 3D properties exposed by the Three.js framework. This script will also implement the following browser based APIs: Accelerometer, Audio, Vibration, Web Crypto, and WebGL (via Three.js). Hopefully the end result will behave more like a native app than a web page.

3D Model Preview

Creating the 3D model

I will use the open source Blender v2.90 to create the 3D dice (or die singular). This is by no means a Blender tutorial, there are plenty of those on youtube however we will cover the basic steps to produce this particular 3D model.

If you don't want to learn how to create the model you can skip this section then download the pre-made assets from the git repo.

Download Blender and fire it up. Conveniently Blender starts up with a sample cube in the project, that's pretty close to a die so let's go with that.

  1. Select the cube and change its size to 1.6 CM (all dimensions). Thats going to make it small so use your mouse wheel to zoom in.

  2. Smooth the edges with a "Bevel Modifier". In the lower-right panel click the wrench icon to view modifiers. Select the cube and click the Add Modifier drop-down > Bevel. Amount 0.2 and Segments 8. The cube should now look smooooooth. Save your work!

  3. UV Mapping is the process by which one wraps a 2D image around a 3D model. For us that means the little black dots (called pips) that determine the dice's value are actually in a flat JPG file derived from a layered Adobe Illustrator AI file. UV Mapping can be a difficult endeavor with complex geometries but a square die is about as simple as it gets. How convenient!

  4. To add the image map; Click into the Shading workspace (top horz menu). Click Add > Texture > Image Texture from the dropdown menu. Click the folder icon then navigate to the dice_uv_map.jpg file. Drag the Color (little dot on the right) onto the Base Color node attaching the new image to the objects texture. The cube should be an orange color and have numbers.

  5. glTF is a relatively new open format for transporting 3D assets. We need to export from Blender in this format so that we can load it into Three.js to display it in the browser. Click the Layout workspace (up top). Select the die then choose File > Export > glTF 2.0 from the application menu. You will be presented with a dialog for saving your model. On the right is a configuration section titled Geometry. Open that and tick Apply Modifiers. Now save your model as dice.glb into your project's root folder.

    Self-check: You can preview your model in a browser by uploading the GLB file to the glTF Viewer website.

Blender 3D Modeling

Create 3D Dice with Strong Random Entropy
Neodigm
Blender 3D UX Blender 3D glTF Three.js Dice Web APIs 2D Flat Dice Texture

Install Three.js

NPM Install Command
npm install --save three
WebPack Config
const path = require('path')

module.exports = {
  entry: './a55_3d_template.js',
  output: {
    path: path.resolve(__dirname, '../static/js'),
    filename: 'a55_3d.js',
  },
  devServer: {
    publicPath: '/public/',
    compress: true,
    port: 9000,
  },
}
a55_3d_template.js
import * as THREE from 'three'

import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader';

window.o3 = THREE;
window.o3loadr = GLTFLoader;
window.o3orbit = OrbitControls;

Rendering 3D object in the browser - three.js

Three.js is a JavaScript framework for implementing WebGL in the browser. It is a popular way to make high-touch experiences on the web.

You will need a recent version of Node.js and NPM installed. This is kind of a must for any modern knowledge worker. Install Three.js via the NPM command then make the required changes to the webpack and template config files.

The objective is to have Webpack rollup only the JavaScript we need into one JS file that we can load like this:

 <script type="module" src ="/js/a55_3d.js"></script>


var o3 = null;
var o3Config = (function(){
    var camera, scene, renderer, controls;
    return {
    "autoSpin": function(){
        controls.update();
        requestAnimationFrame( o3Config.autoSpin );
        renderer.render( scene, camera );
    },
    "spin": function(){
        renderer.render( scene, camera );
    },
    "init": function( e3ds ){
            var sPath = e3ds.dataset.thr3Load, sW = e3ds.dataset.thr3W, sH = e3ds.dataset.thr3H;
                scene = new o3.Scene();/* Scene */

                var pointLightOrange = new o3.PointLight( 0xC9F4ED, 2, 800 );
                pointLightOrange.position.set( -4000, -400, -66 ).normalize();
                scene.add( pointLightOrange );

                camera = new o3.PerspectiveCamera( 4, 1, 1, 1000 );/* Camera */
                camera.position.x = 56; camera.position.y = 56; camera.position.z = 56;
                scene.add( camera );
                camera.add( pointLightOrange ); // Add light to camera

                renderer = new o3.WebGLRenderer( { antialias: true, alpha: true } );/* Renderer */
                renderer.setPixelRatio( window.devicePixelRatio );
                renderer.setSize( sW, sH );
                e3ds.appendChild( renderer.domElement );

                var loader = new o3loadr();/* Loader */
                loader.load( sPath , function ( gltf ) {
                scene.add( gltf.scene );
                o3Config.spin();
                } );

                controls = new o3orbit( camera, renderer.domElement );/* Controls */
                controls.autoRotate = true; controls.autoRotateSpeed = 9.4;
                controls.addEventListener( 'change', o3Config.spin );
                controls.update();
                setTimeout( o3Config.autoSpin, 256);

                window.addEventListener( 'resize', onWindowResize, false );
                function onWindowResize() {
                camera.aspect = 1;
                camera.updateProjectionMatrix();
                renderer.setSize( sW, sH );
                o3Config.spin();
                }
            }
    }
})();
var e3 = document.querySelector("[data-thr3-load]");
if( e3 ) { // Delay 3d call if still null
    setTimeout(function(){
    o3Config.init( e3 );
    }, (o3===null) ? 3800 : 800 )
}
            

High Entropy Dice Roll

The Web Crypto API provides pretty good random numbers. The numbers have greater entropy and less bias. Here is a simple function that returns a random whole number between 1 and 6. Digital computers struggle to produce quality random numbers. They need a seed that represents something that is truly random like a dice throw. See how I brought it full circle. A computer needs a physical representation to create a true random value, even a digital dice would benefit from a physical dice throw. It’s a self referencing meta rabbit hole thought experiment.

Web Crypto API

Crypto Random Number
function getCryptoRange(min, max) {
    const range = max - min + 1
    const mBits = Math.ceil(Math.log2(range))
    const mBytes = Math.ceil(mBits / 8)
    const nAllowed = Math.floor((256 ** mBytes) / range) * range
    const arBytes = new Uint8Array(mBytes)
    let value
    do {
        crypto.getRandomValues(arBytes)
        value = arBytes.reduce((acc, x, n) => acc + x * 256 ** n, 0)
    } while (value >= nAllowed)
    return min + value % range
}

console.log( getCryptoRange( 1, 6 ))



Javascript Generate and Download CSV
Javascript Generate and Download CSV
Produce CSV with client-side JS. Construct Blog and Download as CSV file.
// Desc: Produce CSV with client-side JS. Contruct Blob and Download as CSV file
/*    _________   _____________   ____ __________.__        ___.    
 *    \_   ___ \ /   _____/\   \ /   / \______   \  |   ____\_ |__  
 *    /    \  \/ \_____  \  \   Y   /   |    |  _/  |  /  _ \| __ \ 
 *    \     \____/        \  \     /    |    |   \  |_(  <_> ) \_\ \
 *     \______  /_______  /   \___/     |______  /____/\____/|___  /
 *            \/        \/                     \/                \/    CSV Report */

  The resulting CSV files will contain a header row deterministic column names
  The resulting CSV files will be quoted
  The file name is auto-generated timestamp
  Cell string data may contain a comma , however quotes will be removed
  Cell string data may contain only utf-8 characters

let nativeCSV = ( ( _d )=>{
    let oCnt, jnCSV, sCSV, blCSV, elCSV;  //  config, json, array, blob, and element
    let retObj = {
        "init": ( _oCnt )=>{
            oCnt = _oCnt;
            if( oCnt.fileName.indexOf("####") !== -1) {
                oCnt.fileName = oCnt.fileName.replace("####", Date.now() );}
            jnCSV = sCSV = blCSV = elCSV = "";
            return retObj;
        },
        "setArray": ( _jnCSV )=>{  //  An array (rows) of arrays (cols) !jagged
            jnCSV = _jnCSV;
            if( oCnt.header ) jnCSV.unshift( oCnt.header );
            jnCSV.forEach(( aRow )=>{
                aRow.forEach(( sCol )=>{
                    if( typeof sCol === "string"){
                        sCSV += oCnt.delimQuote + sCol
                            .split( oCnt.delimQuote ).join("");
                        sCSV += oCnt.delimQuote + oCnt.delimCol;                       
                    }
                });
                sCSV = sCSV.slice(0, -1) + oCnt.delimLine;
            });
            return retObj;
        },
        "getBlob": ()=>{
            blCSV = new Blob([ sCSV ], { type: "text/csv;charset=utf-8;" });
            return retObj;
        },
        "createLink": ()=>{
            elCSV = _d.createElement("a");
            elCSV.setAttribute("href", URL.createObjectURL( blCSV ));
            elCSV.setAttribute("download", oCnt.fileName );
            elCSV.style.visibility = 'hidden';
            _d.body.appendChild( elCSV );
            return retObj;
        },
        "clickLink": ()=>{
            elCSV.click();
            return retObj;
        },
        "removeLink": ()=>{
            _d.body.removeChild( elCSV );
            return retObj;
        }
    };
    return retObj;
})( document );

console.log( nativeCSV.init({  //  Usage: 
    "delimCol": ",",
    "delimQuote": '"',
    "delimLine": "\n",
    "fileName": "graph_nodes_####.csv",
    "header": ["id","name", "FQDN"]})
    .setArray( currentGraph2Array(jCurrentGraph) )
    .getBlob()
    .createLink()
    .clickLink()
    .removeLink()    
);

2021-02-27

PWA Add to Home Screen
PWA Add to Home Screen
Progressive Web App ⚡ Advanced Cache && Notification Patterns
/*     ______   __     __     ______    
      /\  == \ /\ \  _ \ \   /\  __ \   
      \ \  _-/ \ \ \/ ".\ \  \ \  __ \  
       \ \_\    \ \__/".~\_\  \ \_\ \_\ 
        \/_/     \/_/   \/_/   \/_/\/_/  ✨ Add to Home Screen
        chrome://serviceworker-internals/
 */
 if ("serviceWorker" in navigator) {
    window.addEventListener("load", () => {
      navigator.serviceWorker.register("sw.js");
    });
}

let eA2hs = oD.getElementsByClassName("js-a2hs")[0];
let eA2hsP = oD.getElementsByClassName("js-a2hs--post")[0];

eA2hs.addEventListener("click", (e) => {
    eA2hs.style.display = "none";
    eA2hsP.style.display = "block";
    evDefPrompt.prompt();
    evDefPrompt.userChoice
      .then((choiceResult) => {
        if (choiceResult.outcome === "accepted") {
          if( snck ) neodigmToast.q("Wow, Now I'm an App on your Desktop|How Convenient!");
          playAudioFile( 7 );  //  ggl tag event | User accepted the A2HS prompt
        } else {
          playAudioFile( 3 );  //  ggl tag event | User dismissed the A2HS prompt
        }
        evDefPrompt = null;
      });
  });

function displayMsg( sMsg ){
    //    System Tray Notification
    if (!("Notification" in window)) {
        console.log('Notification API not supported.');
        return;
    } else if (Notification.permission === "granted") {
        // If it's okay let's create a notification
        var notification = new Notification( Nowish(), {icon: "https://repository-images.githubusercontent.com/178555357/2b6ad880-7aa0-11ea-8dde-63e70187e3e9", body: sMsg} );
    } else if (Notification.permission !== "denied") {
        // Otherwise, we need to ask the user for permission
        Notification.requestPermission(function (permission) {
            // If the user accepts, let's create a notification
            if (permission === "granted") {
                var notification = new Notification( Nowish(), {icon: "https://repository-images.githubusercontent.com/178555357/2b6ad880-7aa0-11ea-8dde-63e70187e3e9", body: sMsg} );
            }
        });
    }
}

/*    ╔═╗┌─┐┬─┐┬  ┬┬┌─┐┌─┐
 *    ╚═╗├┤ ├┬┘└┐┌┘││  ├┤ 
 *    ╚═╝└─┘┴└─ └┘ ┴└─┘└─┘
 *    ╦ ╦┌─┐┬─┐┬┌─┌─┐┬─┐  
 *    ║║║│ │├┬┘├┴┐├┤ ├┬┘  
 *    ╚╩╝└─┘┴└─┴ ┴└─┘┴└─  Advanced Cache ⚡ Notifications
 */
importScripts('https://storage.googleapis.com/workbox-cdn/releases/4.0.0/workbox-sw.js');
workbox.LOG_LEVEL = "debug";
self.addEventListener("fetch", event => {
  event.respondWith(caches.match(event.request)
    .then(cachedResponse => {
        if (cachedResponse) {
          return cachedResponse;
        }
        return fetch(event.request);
      })
    );
});
workbox.routing.registerRoute(
  // Cache CSS files
  /.*\.css/,
  // Use cache but update in the background ASAP
  workbox.strategies.staleWhileRevalidate({
    cacheName: 'css-cache',
  })
);
workbox.routing.registerRoute(
  // Cache image files
  /\.(?:png|gif|jpg|jpeg|webp|avif|svg|mp3|mp4|json|html|js)$/,
  // Use the cache if it's available
  workbox.strategies.cacheFirst({
    cacheName: 'image-cache',
    plugins: [
      new workbox.expiration.Plugin({
        maxEntries: 256, maxAgeSeconds: 172800,
      })
    ],
  })
);

2020-12-21

HTML data attrib to JavaScript camel-case dataset
HTML data attrib to JavaScript camel-case dataset
Convert an HTML formatted data attrib name to a JS formatted name.
// Desc: data-is-whatever will be converted to isWhatever
// Usage: element.dataset[ data2prop("data-is-whatever") ]
/*______ _____ __  __           _____           _       _   
 |  ____/ ____|  \/  |   /\    / ____|         (_)     | |  
 | |__ | |    | \  / |  /  \  | (___   ___ _ __ _ _ __ | |_ 
 |  __|| |    | |\/| | / /\ \  \___ \ / __| '__| | '_ \| __|
 | |___| |____| |  | |/ ____ \ ____) | (__| |  | | |_) | |_ 
 |______\_____|_|  |_/_/    \_\_____/ \___|_|  |_| .__/ \__|
                                                 | |        
                                                 |_|        ES2021*/

function data2prop( sDset ){  //  Convert HTML data attrib name to JS dataset name
    sDset = sDset.replace("data-", "").toLowerCase();
    let aDset = sDset.split(""), aDret = [], bUpper = false;
    aDset.forEach( ( sChar ) => {
        if( sChar == "-" ){
            bUpper = true;
        }else{
            aDret.push( ( bUpper ) ? sChar.toUpperCase() : sChar );
            bUpper = false;
        }
    });
    return aDret.join("");
}

2020-12-19

Oracle PL/SQL Stored Procedure
Oracle PL/SQL Stored Procedure
Vintage Stored Procedure to denormalize department codes
--  ███████  ██████  ██      
--  ██      ██    ██ ██      
--  ███████ ██    ██ ██      
--       ██ ██ ▄▄ ██ ██      
--  ███████  ██████  ███████  Relational ⚡ Transactional
--              ▀▀           
PROCEDURE post_stage
(
    in_rowid_job            cmxlb.cmx_rowid,
    in_ldg_table_name       cmxlb.cmx_table_name,
    in_stg_table_name       cmxlb.cmx_table_name,
    out_error_msg      OUT  cmxlb.cmx_message,
    out_return_code    OUT  int
)
AS
sql_stmt varchar2(2000);
t_party_acct_id varchar2(14);
t_txn_div_cd varchar2(20);
t_txn_div_display varchar2(50);
commit_count NUMBER := 0;
commit_inc NUMBER := 1000;
--
CURSOR C_PTAC_TXN IS
SELECT PARTY_ACCT_ID, TXN_DIV_CD, TXN_DIV_DISPLAY
FROM   C_STG_PTAC_TXN_DIV;
--
BEGIN
--
    commit_inc := to_number(GET_PARAMETER('post_stage_commit', commit_inc));
    IF in_ldg_table_name = 'C_LDG_PTAC_TXN_DIV' AND in_stg_table_name = 'C_STG_PTAC_TXN_DIV' THEN
    --    20130225 SCK Update the stage txn_div_display col with a denormalized string derived
    --    from an aggregate of both staging and base object. 
    --    🏄 SQL ⚡ ETL MDM ⚡ PL/SQL ORM
        cmxlog.debug ('ADDUE: Landing table name is ' || in_ldg_table_name || ' Staging table name is ' || in_stg_table_name);
        BEGIN
              FOR R_PTAC_TXN in C_PTAC_TXN LOOP
                    post_stage_concat(R_PTAC_TXN.PARTY_ACCT_ID, t_txn_div_display);
                    UPDATE C_STG_PTAC_TXN_DIV
                    SET txn_div_display = t_txn_div_display, create_date = sysdate WHERE TXN_DIV_CD = R_PTAC_TXN.TXN_DIV_CD AND
                    PARTY_ACCT_ID = R_PTAC_TXN.PARTY_ACCT_ID;  -- CURRENT OF C_PTAC_TXN;
                    commit_count := commit_count + commit_inc;
                    IF MOD(commit_count, 1000) = 0 THEN
                        cmxlog.debug ('ADDUE: post_stage_concat is: ' || commit_count || ':' || R_PTAC_TXN.PARTY_ACCT_ID || ' : ' || t_txn_div_display);
                        COMMIT;
                    END IF;
              END LOOP;
              COMMIT;
        END;
    ELSE
      CMXlog.debug ('ADDUE Post Stage - no action taken');
    END IF;
END post_stage;
END ADD_UE;

2020-12-19

Dark Mode and Reduced Motion
Dark Mode and Reduced Motion
Making Dark Mode work with both a UI switch && the OS preference.
//  Desc: Listen to the OS for user preference
//  but override with a UI toggle.
/*  ______                  __        ____    ____               __        
   |_   _ `.               [  |  _   |_   \  /   _|             |  ]       
     | | `. \ ,--.   _ .--. | | / ]    |   \/   |   .--.    .--.| | .---.  
     | |  | |`'_\ : [ `/'`\]| '' <     | |\  /| | / .'`\ \/ /'`\' |/ /__\\ 
    _| |_.' /// | |, | |    | |`\ \   _| |_\/_| |_| \__. || \__/  || \__., 
   |______.' \'-;__/[___]  [__|  \_] |_____||_____|'.__.'  '.__.;__]'.__.'  User Prefs */


let doPrefersReducedMotion = function( bMotion ){// Stop 3D rotation
    o3Config.controls.autoRotate = !bMotion; 
}
let doPrefersColorScheme = function( bScheme ){ // UI | OS Semaphore
    document.body.dataset.prefScheme = ((bScheme) ? "dark" : "light"); //  🌙  /  ☀️
}

// Capture the prefers media queries
const mqPrefReducedMotion = window.matchMedia("(prefers-reduced-motion: reduce)");
const mqPrefColorScheme = window.matchMedia("(prefers-color-scheme: dark)");

doPrefersReducedMotion( (mqPrefReducedMotion && mqPrefReducedMotion.matches) );
doPrefersColorScheme( (mqPrefColorScheme && mqPrefColorScheme.matches) );

// listen to changes in the media query's value
mqPrefReducedMotion.addEventListener("change", () => {
    doPrefersReducedMotion( mqPrefReducedMotion.matches );
});
mqPrefColorScheme.addEventListener("change", () => {
    doPrefersColorScheme( mqPrefColorScheme.matches );
});

/* Dark Mode begin */
/*@media (prefers-color-scheme: dark) {*/

    body[data-pref-scheme='dark'] [role='main'] {
        background: linear-gradient(to right, #555, #c2c2c2, #555)
    }
    body[data-pref-scheme='dark'] .h-bg__stripe, body[data-pref-scheme='dark'] .l-caro-design > article, body[data-pref-scheme='dark'] article.l-caro-design {
        background: repeating-linear-gradient(45deg,#242424,#242424 24px,#444 24px,#444 48px);
    }
    body[data-pref-scheme='dark'] section.pfmf-grid > div > article {
        border: solid 1px #888;
        border-top: solid 2px #888;
        box-shadow: 0px 2px 6px -2px rgba(164,164,164,0.6);
        background-color: #242424;
    }
    body[data-pref-scheme='dark'] .readable__doc { color: #fff; }
    body[data-pref-scheme='dark'] .readable__caption { color: #fff; }
    body[data-pref-scheme='dark'] .h-vect-line-art { stroke: #fff;}
/*}*/
/* Dark Mode end */

2020-12-19

Vanilla JS Popover Microinteraction
Vanilla JS Popover Microinteraction
A popover is a transient view that shows on a content screen when a user clicks on a control button or within a defined area.
//  A popover is a transient view that shows on a content screen when
//  a user clicks on a control button or within a defined area.
/*   __  __     __           __  __     __  __    
    /\ \/\ \   /\ \         /\ \/\ \   /\_\_\_\   
    \ \ \_\ \  \ \ \        \ \ \_\ \  \/_/\_\/_  
     \ \_____\  \ \_\        \ \_____\   /\_\/\_\ 
      \/_____/   \/_/         \/_____/   \/_/\/_/   */

let oPopOver = ( ( _win, _doc, _qry ) => {
        let arPops = [], ePos, iOffTop=0, iOffLft=0;
        return {  // Popover UX pattern
            "init": function(){ // wire DOM events
                arPops= [].slice.call(_doc.querySelectorAll( _qry ));
                _win.addEventListener("resize", oPopOver.closeAll);
                _win.addEventListener("scroll", oPopOver.closeAll); 
                _doc.body.addEventListener("click", function( e ){ // 👁️ Outside Click
                    let eTarget = e.target, bInside = false;
                    while( eTarget.tagName !== "HTML" ){
                        if( eTarget.dataset.popover ){ bInside = true; break; }
                        eTarget = eTarget.parentNode;
                    }
                    if( !bInside ){ // Tapped Outside of Popover
                        oPopOver.closeAll();
                    }
                }, true);
            },
            "open": function(id, evPos){ // Open a single Popover
                if( arPops.length == 0) return false;
                oPopOver.closeAll();
                ePos = evPos.currentTarget;
                let elPop = arPops.filter(function(el){
                    return ( el.id == id );
                })[0];
                iOffTop = Number(elPop.dataset.popoverPos.split("|")[0]);
                iOffLft = Number(elPop.dataset.popoverPos.split("|")[1]);
                elPop.dataset.popover = "true"; // Open and Active
                elPop.style.left = oPopOver.position().left+"px";
                elPop.style.top = oPopOver.position().top+"px";
            },
            "closeAll": function(){ // Close all Popovers
                if( arPops.length == 0) return false;
                arPops.map(function(el){
                    el.dataset.popover = "false";
                });
            },
            "position": function(){ // Determine Popover position
                let rec = ePos.getBoundingClientRect(),
                pxLft = _win.pageXOffset || _doc.documentElement.scrollLeft,
                pxTop = _win.pageYOffset || _doc.documentElement.scrollTop;
                return { top: (rec.top + pxTop + iOffTop), left: (rec.left + pxLft + iOffLft) }
            }
        }
    })(window, document, "[data-popover]"); // Declarative implementation

2020-12-16

Vue.js double tap Microinteraction
Vue.js double tap Microinteraction
Firing both a tap and a double-tap on the same element
//  A Vue.js snippet that shows how to capture both a tap and
//  a double-tap on the same element within the template.
//
//  Canonical Use Case: Double-Tap to zoom into a hero image
//  and single-tap to zoom out.

/*    ____   ____                      __        
 *    \   \ /   /_ __   ____          |__| ______
 *     \   Y   /  |  \_/ __ \         |  |/  ___/
 *      \     /|  |  /\  ___/         |  |\___ \ 
 *       \___/ |____/  \___  > /\ /\__|  /____  >
 *                         \/  \/ \______|    \/ */

 methods: {
    "doHeroMobMouseUp": function( ev ){ // Double Tap
      var oHro = this.oHeroZmMob;
      if( oHro.isInit ){
        if( oHro.doubleTap ){ // Zoom In
          oHro.doubleTap = false;
          this.doHeroMobScale( .5 ); // Double Tap
        }else{
          oHro.doubleTap = true;
          setTimeout(function(){ this.doHeroMobMouseUp_expire() }, 380);
        }
      }
      this.oHeroZmMob.isDown = false;
    },
    "doHeroMobMouseUp_expire": function(){ // Single Tap
      var oHro = this.oHeroZmMob;
      if( oHro.isInit ){ // Zoom Out
        if( oHro.doubleTap ) this.doHeroMobScale( -.5 ); // Single Tap
        oHro.doubleTap = false;
      } 
    }
 }
 /*
 This is only part of a larger Vue gesture implementation supporting
 Pinch 🤏, Zoom, Pan, and Swipe. Reach out to me if you want to learn more.
 */

2020-12-15

CSS Advanced Accessibility
CSS Advanced Accessibility
Motion, theme, and skip A11Y CSS solutions
/* Skip to Main Content - CSS Focus rules that make the
link visible when focused from the omnibox.
========================================
====  ========  ========  =====  ====  =
===    =====    ======    =====   ==   =
==  ==  ======  ========  ======  ==  ==
=  ====  =====  ========  ======  ==  ==
=  ====  =====  ========  =======    ===
=        =====  ========  ========  ====
=  ====  =====  ========  ========  ====
=  ====  =====  ========  ========  ====
=  ====  ===      ====      ======  ====
======================================== */

a.skip__main:active, a.skip__main:focus {
    background-color: #fff;
    border-radius: 4px;
    border: 2px solid #000;
    color: #000;
    font-size: 1em;
    height: auto; width: 16%;
    left: auto;
    margin: 8px 42%;
    overflow: auto;
    padding: 4px;
    text-align: center;
    top: auto;
    z-index: 1024;
}
a.skip__main {
    left: -1024px;
    overflow: hidden;
    position: absolute;
    top: auto;
    width: 1px; height: 1px;
    z-index: -1024;
}
/* Dark Mode begin */
@media (prefers-color-scheme: dark) {
    body, [role='main'] {
        background: linear-gradient(to right, #555, #c2c2c2, #555)
    }
    .h-bg__stripe, .l-caro-design > article, article.l-caro-design {
        background: repeating-linear-gradient(45deg,#bbb,#bbb 24px,#ddd 24px,#ddd 48px);
    }
}
/* Dark Mode end */

/* Reduced Motion begin*/
@media (prefers-reduced-motion: reduce) {
    .hero__vect { animation: none; }
}
/* Reduced Motion end*/

<a class="js-skip__main--id skip__main"
href="#a11y-skipmain">Skip to Main Content</a>

2020-12-13

JS Airport Geo-Proximity Radius
JS Airport Geo-Proximity Radius
Airport geo-proximity logic that answers questions, like; “What are the three closest airports to me right now?”
// Desc: Get the closest airports by geolocation radius
// Usage: closestAirports.find(-99, -99, oAirports, 4); // 4 miles

/*       ___           _                 _   _             
 *      / _ \___  ___ | | ___   ___ __ _| |_(_) ___  _ __  
 *     / /_\/ _ \/ _ \| |/ _ \ / __/ _` | __| |/ _ \| '_ \ 
 *    / /_\\  __/ (_) | | (_) | (_| (_| | |_| | (_) | | | |
 *    \____/\___|\___/|_|\___/ \___\__,_|\__|_|\___/|_| |_|  ✈️ */

function getDistance(lat1, lon1, lat2, lon2) {
    let radlat1 = Math.PI * lat1/180;
    let radlat2 = Math.PI * lat2/180;
    let theta = lon1-lon2;
    let radtheta = Math.PI * theta/180;
    let dst = Math.sin(radlat1) * Math.sin(radlat2) + Math.cos(radlat1) * Math.cos(radlat2) * Math.cos(radtheta);
    if (dst > 1) dst = 1;
    dst = Math.acos(dst);
    dst = dst * (180/Math.PI) * (60 * 1.1515); // miles
    return dst;
  }

let closestAirports = ((_d) => {
    return {
      "find": function(nLat, nLon, objPorts, nRadius){
        if(nLat && nLon && objPorts){
          let arrPorts = [];
          for (let prop in objPorts) { // Sort Object
            if (objPorts.hasOwnProperty(prop)) {
              let lat = objPorts[prop].geoCode.split(",")[0];
              let lon = objPorts[prop].geoCode.split(",")[1];
              arrPorts.push({
                'key': prop, 'lat': lat, 'lon': lon,
                "dist": getDistance(lat, lon, nLat, nLon),
                "formattedAirport": objPorts[prop].formattedAirport
              });
            }
          }
          arrPorts.sort(function(a, b){
            // Sort by Distance
            return a.dist - b.dist;
          });
          return arrPorts.filter(function(aP){
            return (aP.dist <= nRadius);
          });
        }
      }
    };
})(document);

2020-12-13

Cypress E2E Quality Assurance
Cypress E2E Quality Assurance
End to End testing 🚀 Headless browser automation
/*    _____                               
     /  __ \                              
     | /  \/_   _ _ __  _ __ ___  ___ ___ 
     | |   | | | | '_ \| '__/ _ \/ __/ __|
     | \__/\ |_| | |_) | | |  __/\__ \__ \
      \____/\__, | .__/|_|  \___||___/___/.io
             __/ | |                      
            |___/|_|                      E2E

✅ Automatically capture a video when a test fails
✅ Test values persisted in the Vuex (Vue.js Vuex specific) store
✅ Apply optional configuration files via the command line (requires v3.6)
✅ Create custom reusable, and chainable commands, such as cy.signIn() or cy.turnOnFeature()
✅ Test responsive layout & Local Storage
✅ Test A11y WCAG success criteria  */

describe('E2E test | Hotel navigation, selection, and discovery', () => {
  context('Admin Add Hotel to Event', function () { // ignore CORS
      Cypress.on('uncaught:exception', (err, runnable) => { return false });
      it('Success Login then Save Event', () => {
          cy.viewport(1066, 600)  //  large laptop 66.563em
          cy.log( JSON.stringify(Cypress.env()) )
          let event_url;  //  The URL of the first event (default)
          let dMessage = new Date();  //  Now
          dMessage = dMessage.toDateString() + " " + dMessage.toLocaleTimeString();

          cy.tt_SignIn(Cypress.env( "mock_email" ), Cypress.env( "mock_password" ))
          .then(() => {
              cy.window().then( $win => {
                  cy.wrap( $win.system_output ).should("exist")
              })
          })
          cy.url().should('not.include', 'login.')
          cy.visit( Cypress.env( "e2e_url_events" ) )
          cy.url().should('include', 'events.')
          Cypress.Cookies.debug(true, { verbose: false })
          cy.getCookie('logintoken').should('exist')
          cy.getCookie('role_id').should('exist')
          cy.getCookie('username').should('exist')
          cy.getCookie('otapi_token').should('exist')
          cy.get("a[href*='event-edit']" ).first().click()  //  Find the first matching link in the table.
          cy.get("#messages" ).type("{selectall}{backspace}E2E Test: " + dMessage )
          cy.get("#eventForm > div.border-top.d-flex.pt-3.row > div > input" ).first().click()  //  Save change

          cy.get("#airTab" ).click()  //  select tab
          cy.get("#activate_flights" ).check();
          cy.get("#flightForm > div.border-top.d-flex.pt-3.row > div > input" ).click();           

          cy.get("#vehicleTab" ).click()  //  select tab
          cy.get("#activate_vehicle" ).uncheck();
          cy.get("#vehicleForm > div.border-top.d-flex.pt-3.row > div > input" ).click();   

          cy.get("#hotelTab" ).click()  //  select tab
          cy.get("#activate_hotels" ).check();
          cy.get("#hotelForm > div.border-top.d-flex.pt-3.row > div > input" ).click();   

          //  Extract URL from INPUT
          cy.get('#siteURL').invoke('val')
              .then( value => { event_url = value; });
          cy.then(() => { return cy.visit(event_url); });
      })
  })
  context('Choose Flight', function () {
      Cypress.on('uncaught:exception', (err, runnable) => { return false }); // ignore CORS
      it('Success Flight added to cart', () => {
          cy.viewport(1066, 600)  //  large laptop 66.563em 
          cy.get("#from_airport" ).type( "ORD" )
          cy.get("#to_airport" ).type( "LGA" )
          cy.get("input[name='from_date']" ).click({ force: true })

          cy.server()
          cy.route("*").as( "checkout" )

          cy.get("div.vdp-datepicker.flex-fill > div:nth-child(2) > div > span:nth-child(39)" ).first().click()
          cy.get("#search-widget-btn" ).click()
          cy.wait("@checkout" ).its('status').should('eq', 200)

          cy.get("h5.modal-title").should("not.be.visible")
              .then( ($ModalMsg) => {
                  cy.get("div.align-self-center.col-6.col-md.col-sm.col-xl.order-12.p-xs-1.text-right > button" ).first().click() 
              } )
      })
  })
  context('Hotel LightBox', function () {
      Cypress.on('uncaught:exception', (err, runnable) => { return false }); // ignore CORS
      it('Success Hotel added to cart', () => {
          cy.viewport(1066, 600)  //  large laptop 66.563em
          cy.wait(2000)
          cy.get("picture > img" ).first()
              .then( ( $picture )=>{
                  cy.wrap( $picture  ).click()
                  cy.wait( 6000 )
              })
          cy.get(".l-ltbx__image" ).first().click()  //  Cycle photos forward
          cy.get(".l-ltbx__vect--right" )
              .then( ( $arrow_right ) => {
                  cy.wait( 1000 )
                  cy.wrap( $arrow_right ).click()
                  cy.wait( 1000 )
                  cy.wrap( $arrow_right ).click()
                  cy.wait( 1000 )
                  cy.wrap( $arrow_right ).click()
          })
          cy.wait( 1000 )
          cy.get(".l-ltbx__btn" ).first()  //  Cycle photos backward
              .then( ( $arrow_left ) => {
                  cy.wrap( $arrow_left ).click()
                  cy.wait( 1000 )
              })
          cy.get(".l-ltbx__figcap").invoke("text").should("include", "4 of")
              .then( () => {
                  cy.get(".l-ltbx__vect" ).first().click()  //  Close Modal
                  cy.get("OUTPUT BUTTON.l-button" ).first().click()  //  Book Room
                      .then( () => {
                          cy.get( "A.ttfont-semibold.tttext-gray-700").first().click()  //  Change Tab
                          cy.wait( 1000 )
                          cy.get( "A.ttfont-semibold.tttext-gray-700").first().click()  //  Change Tab
                          cy.wait( 1000 )
                          cy.get( "ARTICLE SECTION BUTTON.l-button").first().click()  //  Book Room
                              .then( ()=>{
                                  cy.wait( 4000 )
                                  cy.url().should('include', '/checkout')
                              })
                      })
              })
      })
  })
})

2020-12-07

Asynchronous eCom Nav Category Count
Asynchronous eCom Nav Category Count
Asynchronous recursive crawl reports the total number of products by category.
// Desc:  Asynchronous recursive crawl report the total number of products by category
// Usage: Console SNIPPET catCount.init();

/*   @@@@@@ @@@  @@@ @@@ @@@@@@@  @@@@@@@  @@@@@@@@ @@@@@@@ 
    !@@     @@!@!@@@ @@! @@!  @@@ @@!  @@@ @@!        @!!   
     !@@!!  @!@@!!@! !!@ @!@@!@!  @!@@!@!  @!!!:!     @!!   
        !:! !!:  !!! !!: !!:      !!:      !!:        !!:   
    ::.: :  ::    :  :    :        :       : :: ::     :     run in console */

var catCount = (function(_d,_q){
    "use strict";
    let aSub = [];
    console.clear();

    return {
        init: function(){
            // Get ref to all product categories in the left nav 🛒
            aSub = [ ... _d.querySelectorAll( _q ) ].filter( ( el ) => {
                return (( el.firstChild.nodeValue ) && ( el.href ));
            } );
            aSub.forEach( ( elLink ) => {
                if( elLink ) catCount.asyncTotal( elLink );
            } );
        },
        parse: function( _Name, _Contents ){
            let aTotl = _Contents.split("sizeTotalNumRecs");
            if( aTotl[1].split('"')[2] ){
                 console.log( _Name, aTotl[1].split('"')[2]);
            }
            return true;
        },
        asyncTotal: function( _elLink ){
            let oXhr = new XMLHttpRequest();
            oXhr.open("GET", _elLink.href, true);
            oXhr.onreadystatechange = () => {
                if( this.readyState!==4 || this.status!==200 ) return;
                catCount.parse( _elLink.firstChild.nodeValue, this.responseText );
            };
            oXhr.send();
        }
    }

})(document, "LI.item nav > a" );

2020-12-07

Color of the Year CSS Styles
Color of the Year CSS Styles
Color of the Year 2000 thru 2021 CSS Utility classes
/* Tailwind like CSS Utility classes for the
Pantone Color of the Years from 2000 thru 2021
/*      ____             _                   
 *     |  _ \ __ _ _ __ | |_ ___  _ __   ___ 
 *     | |_) / _` | '_ \| __/ _ \| '_ \ / _ \  2000- 2021
 *     |  __/ (_| | | | | || (_) | | | |  __/
 *     |_|   \__,_|_| |_|\__\___/|_| |_|\___|  🟥 🟩 🟦 🟪 🟨 */

 /* Color of the Year begin */
 .bg-coy_2000  {background-color: #9BB7D4;}  /* Cerulean */
 .bg-coy_2001  {background-color: #C74375;}  /* Fuchsia Rose */
 .bg-coy_2002  {background-color: #BF1932;}  /* True Red */
 .bg-coy_2003  {background-color: #7BC4C4;}  /* Aqua Sky */
 .bg-coy_2004  {background-color: #E2583E;}  /* Tigerlily */
 .bg-coy_2005  {background-color: #53B0AE;}  /* Blue Turquoise */
 .bg-coy_2006  {background-color: #DECDBE;}  /* Sand Dollar */
 .bg-coy_2007  {background-color: #9B1B30;}  /* Chili Pepper */
 .bg-coy_2008  {background-color: #5A5B9F;}  /* Blue Iris */
 .bg-coy_2009  {background-color: #F0C05A;}  /* Mimosa */
 .bg-coy_2010  {background-color: #45B5AA;}  /* Turquoise */
 .bg-coy_2011  {background-color: #D94F70;}  /* Honeysuckle */
 .bg-coy_2012  {background-color: #DD4124;}  /* Tangerine Tango */
 .bg-coy_2013  {background-color: #009473;}  /* Emerald */
 .bg-coy_2014  {background-color: #B163A3;}  /* Radiant Orchid */
 .bg-coy_2015  {background-color: #955251;}  /* Marsala */
 .bg-coy_2016  {background-color: #F7CAC9;}  /* Rose Quartz */
 .bg-coy_2016b {background-color: #92A8D1;}  /* Serenity */
 .bg-coy_2017  {background-color: #88B04B;}  /* Greenery */
 .bg-coy_2018  {background-color: #5F4B8B;}  /* Ultra Violet */
 .bg-coy_2019  {background-color: #FF6F61;}  /* Living Coral */
 .bg-coy_2020  {background-color: #0F4C81;}  /* Classic Blue */
 .bg-coy_2021  {background-color: #939597;}  /* Ultimate Gray */
 .bg-coy_2021b {background-color: #F5DF4D;}  /* Illuminating */

 .text-coy_2000  {color: #9BB7D4;}  /* Cerulean */
 .text-coy_2001  {color: #C74375;}  /* Fuchsia Rose */
 .text-coy_2002  {color: #BF1932;}  /* True Red */
 .text-coy_2003  {color: #7BC4C4;}  /* Aqua Sky */
 .text-coy_2004  {color: #E2583E;}  /* Tigerlily */
 .text-coy_2005  {color: #53B0AE;}  /* Blue Turquoise */
 .text-coy_2006  {color: #DECDBE;}  /* Sand Dollar */
 .text-coy_2007  {color: #9B1B30;}  /* Chili Pepper */
 .text-coy_2008  {color: #5A5B9F;}  /* Blue Iris */
 .text-coy_2009  {color: #F0C05A;}  /* Mimosa */
 .text-coy_2010  {color: #45B5AA;}  /* Turquoise */
 .text-coy_2011  {color: #D94F70;}  /* Honeysuckle */
 .text-coy_2012  {color: #DD4124;}  /* Tangerine Tango */
 .text-coy_2013  {color: #009473;}  /* Emerald */
 .text-coy_2014  {color: #B163A3;}  /* Radiant Orchid */
 .text-coy_2015  {color: #955251;}  /* Marsala */
 .text-coy_2016  {color: #F7CAC9;}  /* Rose Quartz */
 .text-coy_2016b {color: #92A8D1;}  /* Serenity */
 .text-coy_2017  {color: #88B04B;}  /* Greenery */
 .text-coy_2018  {color: #5F4B8B;}  /* Ultra Violet */
 .text-coy_2019  {color: #FF6F61;}  /* Living Coral */
 .text-coy_2020  {color: #0F4C81;}  /* Classic Blue */
 .text-coy_2021  {color: #939597;}  /* Ultimate Gray */
 .text-coy_2021b {color: #F5DF4D;}  /* Illuminating */
 /* Color of the Year end */

2020-12-07

Virtual Keyboard Extention Configuration
Virtual Keyboard Extention Configuration
TS Virtual Keyboard Chrome Extention
// TS Virtual Keyboard ⌨️ Chrome Extention | Configuration Class
/***
 *     _______                     _                _            
 *    (_______)                   | |              (_)      _    
 *     _      _   _ ____   ____    \ \   ____  ____ _ ____ | |_  
 *    | |    | | | |  _ \ / _  )    \ \ / ___)/ ___) |  _ \|  _) 
 *    | |____| |_| | | | ( (/ / _____) | (___| |   | | | | | |__ 
 *     \______)__  | ||_/ \____|______/ \____)_|   |_| ||_/ \___)
 *           (____/|_|                               |_|         
 npm install --save @types/chrome
 */

class AVKOptions {
    aOpts : Array<any>;
    constructor ( pAr : Array<any> = [] ) {
        this.aOpts = pAr;
    }
    setState (  sOpt : string, bState : boolean ) : boolean{
        this.aOpts = this.aOpts.filter( (e) => {
            if (e[0] === sOpt) e[1] = bState;
             return true;
        } );
        return bState;
    }
    getState ( sOpt : string ) : boolean {
        return this.aOpts.filter( (e) => {
            if (e[0] === sOpt) {
                return true;
            }            
        })[0][1];
    }
    getFeedback ( sOpt : string ) : string {
        return this.aOpts.filter( (e) => {
            if (e[0] === sOpt) {
                return true;
            }            
        })[0][2];
    }
}
export let options = new AVKOptions([["audio", false, "Click Sounds"],
["autohide", false, "Hide if not in use"], ["blur", false, "Blur Text"],
["hover", false, "Hover No Click"], ["opaque", false, "Cannot See Through"],
["scramble", false, "Rearrange Keys"], ["theme", false, "Daytime theme"]]);

2020-12-07

Web Music Ad Blocker Snippet
Web Music Ad Blocker Snippet
Automatically mute the Music player when Ads are playing and unmute when they are done (in Chrome).
/* Install: Open Chrome Dev Tools (Command+option+I on Mac). Menu > Sources > Snippets
   Install: Create a new Snippet named musicADify.js, Paste this script, Save (Command+S).
   Usage: Run the Snippet once each time you start the Music Web Player.
   Usage: Right-Click the snippet named musicADify.js and choose Run from the drop-down.
   Usage: Close Chrome Dev Tools. 🏖️ Play your Jams! 🎶

╔═╗┌─┐┌─┐┌┬┐┬┌─┐┬ ┬  ╔═╗┌┬┐┌─┐
╚═╗├─┘│ │ │ │├┤ └┬┘  ╠═╣ ││└─┐
╚═╝┴  └─┘ ┴ ┴└   ┴   ╩ ╩─┴┘└─┘ */

 let spotADify = ( (_d, _q, _t) => {
    let eS = _d.querySelector( _q ), bS = true;
    if( eS ){ // 🏖️ Play your Jams! 🎶
        bS = ( eS.getAttribute("aria-label") == "Mute" );
        setInterval( () => {spotADify.tick();}, _t);
        return {
        "tick":  () => {
          if((_d.title.indexOf("Adve") != -1) || (_d.title.indexOf("Spoti") != -1)){
              if(  bS ){ eS.click(); bS=!true; }
          }else{
              if( !bS ){ eS.click(); bS=true; }
          }
        }
      }
    }
  })( document, "[aria-label='Mute'],[aria-label='Unmute']", 256);

2020-12-07

Real-world Vetted Snippets

Accelerometer API Audio API Blender Git glTF HTML Canvas JavaScript NPM Three.js UV Mapping Web Crypto API WebGL Webpack